
require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
(function (global){
/**
 * @license
 * lodash 3.10.1 (Custom Build) <https://lodash.com/>
 * Build: `lodash modern -d -o ./index.js`
 * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <https://lodash.com/license>
 */
;(function() {

  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  var undefined;

  /** Used as the semantic version number. */
  var VERSION = '3.10.1';

  /** Used to compose bitmasks for wrapper metadata. */
  var BIND_FLAG = 1,
      BIND_KEY_FLAG = 2,
      CURRY_BOUND_FLAG = 4,
      CURRY_FLAG = 8,
      CURRY_RIGHT_FLAG = 16,
      PARTIAL_FLAG = 32,
      PARTIAL_RIGHT_FLAG = 64,
      ARY_FLAG = 128,
      REARG_FLAG = 256;

  /** Used as default options for `_.trunc`. */
  var DEFAULT_TRUNC_LENGTH = 30,
      DEFAULT_TRUNC_OMISSION = '...';

  /** Used to detect when a function becomes hot. */
  var HOT_COUNT = 150,
      HOT_SPAN = 16;

  /** Used as the size to enable large array optimizations. */
  var LARGE_ARRAY_SIZE = 200;

  /** Used to indicate the type of lazy iteratees. */
  var LAZY_FILTER_FLAG = 1,
      LAZY_MAP_FLAG = 2;

  /** Used as the `TypeError` message for "Functions" methods. */
  var FUNC_ERROR_TEXT = 'Expected a function';

  /** Used as the internal argument placeholder. */
  var PLACEHOLDER = '__lodash_placeholder__';

  /** `Object#toString` result references. */
  var argsTag = '[object Arguments]',
      arrayTag = '[object Array]',
      boolTag = '[object Boolean]',
      dateTag = '[object Date]',
      errorTag = '[object Error]',
      funcTag = '[object Function]',
      mapTag = '[object Map]',
      numberTag = '[object Number]',
      objectTag = '[object Object]',
      regexpTag = '[object RegExp]',
      setTag = '[object Set]',
      stringTag = '[object String]',
      weakMapTag = '[object WeakMap]';

  var arrayBufferTag = '[object ArrayBuffer]',
      float32Tag = '[object Float32Array]',
      float64Tag = '[object Float64Array]',
      int8Tag = '[object Int8Array]',
      int16Tag = '[object Int16Array]',
      int32Tag = '[object Int32Array]',
      uint8Tag = '[object Uint8Array]',
      uint8ClampedTag = '[object Uint8ClampedArray]',
      uint16Tag = '[object Uint16Array]',
      uint32Tag = '[object Uint32Array]';

  /** Used to match empty string literals in compiled template source. */
  var reEmptyStringLeading = /\b__p \+= '';/g,
      reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
      reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;

  /** Used to match HTML entities and HTML characters. */
  var reEscapedHtml = /&(?:amp|lt|gt|quot|#39|#96);/g,
      reUnescapedHtml = /[&<>"'`]/g,
      reHasEscapedHtml = RegExp(reEscapedHtml.source),
      reHasUnescapedHtml = RegExp(reUnescapedHtml.source);

  /** Used to match template delimiters. */
  var reEscape = /<%-([\s\S]+?)%>/g,
      reEvaluate = /<%([\s\S]+?)%>/g,
      reInterpolate = /<%=([\s\S]+?)%>/g;

  /** Used to match property names within property paths. */
  var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\n\\]|\\.)*?\1)\]/,
      reIsPlainProp = /^\w*$/,
      rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\n\\]|\\.)*?)\2)\]/g;

  /**
   * Used to match `RegExp` [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns)
   * and those outlined by [`EscapeRegExpPattern`](http://ecma-international.org/ecma-262/6.0/#sec-escaperegexppattern).
   */
  var reRegExpChars = /^[:!,]|[\\^$.*+?()[\]{}|\/]|(^[0-9a-fA-Fnrtuvx])|([\n\r\u2028\u2029])/g,
      reHasRegExpChars = RegExp(reRegExpChars.source);

  /** Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks). */
  var reComboMark = /[\u0300-\u036f\ufe20-\ufe23]/g;

  /** Used to match backslashes in property paths. */
  var reEscapeChar = /\\(\\)?/g;

  /** Used to match [ES template delimiters](http://ecma-international.org/ecma-262/6.0/#sec-template-literal-lexical-components). */
  var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;

  /** Used to match `RegExp` flags from their coerced string values. */
  var reFlags = /\w*$/;

  /** Used to detect hexadecimal string values. */
  var reHasHexPrefix = /^0[xX]/;

  /** Used to detect host constructors (Safari > 5). */
  var reIsHostCtor = /^\[object .+?Constructor\]$/;

  /** Used to detect unsigned integer values. */
  var reIsUint = /^\d+$/;

  /** Used to match latin-1 supplementary letters (excluding mathematical operators). */
  var reLatin1 = /[\xc0-\xd6\xd8-\xde\xdf-\xf6\xf8-\xff]/g;

  /** Used to ensure capturing order of template delimiters. */
  var reNoMatch = /($^)/;

  /** Used to match unescaped characters in compiled string literals. */
  var reUnescapedString = /['\n\r\u2028\u2029\\]/g;

  /** Used to match words to create compound words. */
  var reWords = (function() {
    var upper = '[A-Z\\xc0-\\xd6\\xd8-\\xde]',
        lower = '[a-z\\xdf-\\xf6\\xf8-\\xff]+';

    return RegExp(upper + '+(?=' + upper + lower + ')|' + upper + '?' + lower + '|' + upper + '+|[0-9]+', 'g');
  }());

  /** Used to assign default `context` object properties. */
  var contextProps = [
    'Array', 'ArrayBuffer', 'Date', 'Error', 'Float32Array', 'Float64Array',
    'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Math', 'Number',
    'Object', 'RegExp', 'Set', 'String', '_', 'clearTimeout', 'isFinite',
    'parseFloat', 'parseInt', 'setTimeout', 'TypeError', 'Uint8Array',
    'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap'
  ];

  /** Used to make template sourceURLs easier to identify. */
  var templateCounter = -1;

  /** Used to identify `toStringTag` values of typed arrays. */
  var typedArrayTags = {};
  typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
  typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
  typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
  typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
  typedArrayTags[uint32Tag] = true;
  typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
  typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
  typedArrayTags[dateTag] = typedArrayTags[errorTag] =
  typedArrayTags[funcTag] = typedArrayTags[mapTag] =
  typedArrayTags[numberTag] = typedArrayTags[objectTag] =
  typedArrayTags[regexpTag] = typedArrayTags[setTag] =
  typedArrayTags[stringTag] = typedArrayTags[weakMapTag] = false;

  /** Used to identify `toStringTag` values supported by `_.clone`. */
  var cloneableTags = {};
  cloneableTags[argsTag] = cloneableTags[arrayTag] =
  cloneableTags[arrayBufferTag] = cloneableTags[boolTag] =
  cloneableTags[dateTag] = cloneableTags[float32Tag] =
  cloneableTags[float64Tag] = cloneableTags[int8Tag] =
  cloneableTags[int16Tag] = cloneableTags[int32Tag] =
  cloneableTags[numberTag] = cloneableTags[objectTag] =
  cloneableTags[regexpTag] = cloneableTags[stringTag] =
  cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
  cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
  cloneableTags[errorTag] = cloneableTags[funcTag] =
  cloneableTags[mapTag] = cloneableTags[setTag] =
  cloneableTags[weakMapTag] = false;

  /** Used to map latin-1 supplementary letters to basic latin letters. */
  var deburredLetters = {
    '\xc0': 'A',  '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
    '\xe0': 'a',  '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
    '\xc7': 'C',  '\xe7': 'c',
    '\xd0': 'D',  '\xf0': 'd',
    '\xc8': 'E',  '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
    '\xe8': 'e',  '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
    '\xcC': 'I',  '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
    '\xeC': 'i',  '\xed': 'i', '\xee': 'i', '\xef': 'i',
    '\xd1': 'N',  '\xf1': 'n',
    '\xd2': 'O',  '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
    '\xf2': 'o',  '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
    '\xd9': 'U',  '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
    '\xf9': 'u',  '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
    '\xdd': 'Y',  '\xfd': 'y', '\xff': 'y',
    '\xc6': 'Ae', '\xe6': 'ae',
    '\xde': 'Th', '\xfe': 'th',
    '\xdf': 'ss'
  };

  /** Used to map characters to HTML entities. */
  var htmlEscapes = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#39;',
    '`': '&#96;'
  };

  /** Used to map HTML entities to characters. */
  var htmlUnescapes = {
    '&amp;': '&',
    '&lt;': '<',
    '&gt;': '>',
    '&quot;': '"',
    '&#39;': "'",
    '&#96;': '`'
  };

  /** Used to determine if values are of the language type `Object`. */
  var objectTypes = {
    'function': true,
    'object': true
  };

  /** Used to escape characters for inclusion in compiled regexes. */
  var regexpEscapes = {
    '0': 'x30', '1': 'x31', '2': 'x32', '3': 'x33', '4': 'x34',
    '5': 'x35', '6': 'x36', '7': 'x37', '8': 'x38', '9': 'x39',
    'A': 'x41', 'B': 'x42', 'C': 'x43', 'D': 'x44', 'E': 'x45', 'F': 'x46',
    'a': 'x61', 'b': 'x62', 'c': 'x63', 'd': 'x64', 'e': 'x65', 'f': 'x66',
    'n': 'x6e', 'r': 'x72', 't': 'x74', 'u': 'x75', 'v': 'x76', 'x': 'x78'
  };

  /** Used to escape characters for inclusion in compiled string literals. */
  var stringEscapes = {
    '\\': '\\',
    "'": "'",
    '\n': 'n',
    '\r': 'r',
    '\u2028': 'u2028',
    '\u2029': 'u2029'
  };

  /** Detect free variable `exports`. */
  var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;

  /** Detect free variable `module`. */
  var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;

  /** Detect free variable `global` from Node.js. */
  var freeGlobal = freeExports && freeModule && typeof global == 'object' && global && global.Object && global;

  /** Detect free variable `self`. */
  var freeSelf = objectTypes[typeof self] && self && self.Object && self;

  /** Detect free variable `window`. */
  var freeWindow = objectTypes[typeof window] && window && window.Object && window;

  /** Detect the popular CommonJS extension `module.exports`. */
  var moduleExports = freeModule && freeModule.exports === freeExports && freeExports;

  /**
   * Used as a reference to the global object.
   *
   * The `this` value is used if it's the global object to avoid Greasemonkey's
   * restricted `window` object, otherwise the `window` object is used.
   */
  var root = freeGlobal || ((freeWindow !== (this && this.window)) && freeWindow) || freeSelf || this;

  /*--------------------------------------------------------------------------*/

  /**
   * The base implementation of `compareAscending` which compares values and
   * sorts them in ascending order without guaranteeing a stable sort.
   *
   * @private
   * @param {*} value The value to compare.
   * @param {*} other The other value to compare.
   * @returns {number} Returns the sort order indicator for `value`.
   */
  function baseCompareAscending(value, other) {
    if (value !== other) {
      var valIsNull = value === null,
          valIsUndef = value === undefined,
          valIsReflexive = value === value;

      var othIsNull = other === null,
          othIsUndef = other === undefined,
          othIsReflexive = other === other;

      if ((value > other && !othIsNull) || !valIsReflexive ||
          (valIsNull && !othIsUndef && othIsReflexive) ||
          (valIsUndef && othIsReflexive)) {
        return 1;
      }
      if ((value < other && !valIsNull) || !othIsReflexive ||
          (othIsNull && !valIsUndef && valIsReflexive) ||
          (othIsUndef && valIsReflexive)) {
        return -1;
      }
    }
    return 0;
  }

  /**
   * The base implementation of `_.findIndex` and `_.findLastIndex` without
   * support for callback shorthands and `this` binding.
   *
   * @private
   * @param {Array} array The array to search.
   * @param {Function} predicate The function invoked per iteration.
   * @param {boolean} [fromRight] Specify iterating from right to left.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function baseFindIndex(array, predicate, fromRight) {
    var length = array.length,
        index = fromRight ? length : -1;

    while ((fromRight ? index-- : ++index < length)) {
      if (predicate(array[index], index, array)) {
        return index;
      }
    }
    return -1;
  }

  /**
   * The base implementation of `_.indexOf` without support for binary searches.
   *
   * @private
   * @param {Array} array The array to search.
   * @param {*} value The value to search for.
   * @param {number} fromIndex The index to search from.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function baseIndexOf(array, value, fromIndex) {
    if (value !== value) {
      return indexOfNaN(array, fromIndex);
    }
    var index = fromIndex - 1,
        length = array.length;

    while (++index < length) {
      if (array[index] === value) {
        return index;
      }
    }
    return -1;
  }

  /**
   * The base implementation of `_.isFunction` without support for environments
   * with incorrect `typeof` results.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
   */
  function baseIsFunction(value) {
    // Avoid a Chakra JIT bug in compatibility modes of IE 11.
    // See https://github.com/jashkenas/underscore/issues/1621 for more details.
    return typeof value == 'function' || false;
  }

  /**
   * Converts `value` to a string if it's not one. An empty string is returned
   * for `null` or `undefined` values.
   *
   * @private
   * @param {*} value The value to process.
   * @returns {string} Returns the string.
   */
  function baseToString(value) {
    return value == null ? '' : (value + '');
  }

  /**
   * Used by `_.trim` and `_.trimLeft` to get the index of the first character
   * of `string` that is not found in `chars`.
   *
   * @private
   * @param {string} string The string to inspect.
   * @param {string} chars The characters to find.
   * @returns {number} Returns the index of the first character not found in `chars`.
   */
  function charsLeftIndex(string, chars) {
    var index = -1,
        length = string.length;

    while (++index < length && chars.indexOf(string.charAt(index)) > -1) {}
    return index;
  }

  /**
   * Used by `_.trim` and `_.trimRight` to get the index of the last character
   * of `string` that is not found in `chars`.
   *
   * @private
   * @param {string} string The string to inspect.
   * @param {string} chars The characters to find.
   * @returns {number} Returns the index of the last character not found in `chars`.
   */
  function charsRightIndex(string, chars) {
    var index = string.length;

    while (index-- && chars.indexOf(string.charAt(index)) > -1) {}
    return index;
  }

  /**
   * Used by `_.sortBy` to compare transformed elements of a collection and stable
   * sort them in ascending order.
   *
   * @private
   * @param {Object} object The object to compare.
   * @param {Object} other The other object to compare.
   * @returns {number} Returns the sort order indicator for `object`.
   */
  function compareAscending(object, other) {
    return baseCompareAscending(object.criteria, other.criteria) || (object.index - other.index);
  }

  /**
   * Used by `_.sortByOrder` to compare multiple properties of a value to another
   * and stable sort them.
   *
   * If `orders` is unspecified, all valuess are sorted in ascending order. Otherwise,
   * a value is sorted in ascending order if its corresponding order is "asc", and
   * descending if "desc".
   *
   * @private
   * @param {Object} object The object to compare.
   * @param {Object} other The other object to compare.
   * @param {boolean[]} orders The order to sort by for each property.
   * @returns {number} Returns the sort order indicator for `object`.
   */
  function compareMultiple(object, other, orders) {
    var index = -1,
        objCriteria = object.criteria,
        othCriteria = other.criteria,
        length = objCriteria.length,
        ordersLength = orders.length;

    while (++index < length) {
      var result = baseCompareAscending(objCriteria[index], othCriteria[index]);
      if (result) {
        if (index >= ordersLength) {
          return result;
        }
        var order = orders[index];
        return result * ((order === 'asc' || order === true) ? 1 : -1);
      }
    }
    // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
    // that causes it, under certain circumstances, to provide the same value for
    // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
    // for more details.
    //
    // This also ensures a stable sort in V8 and other engines.
    // See https://code.google.com/p/v8/issues/detail?id=90 for more details.
    return object.index - other.index;
  }

  /**
   * Used by `_.deburr` to convert latin-1 supplementary letters to basic latin letters.
   *
   * @private
   * @param {string} letter The matched letter to deburr.
   * @returns {string} Returns the deburred letter.
   */
  function deburrLetter(letter) {
    return deburredLetters[letter];
  }

  /**
   * Used by `_.escape` to convert characters to HTML entities.
   *
   * @private
   * @param {string} chr The matched character to escape.
   * @returns {string} Returns the escaped character.
   */
  function escapeHtmlChar(chr) {
    return htmlEscapes[chr];
  }

  /**
   * Used by `_.escapeRegExp` to escape characters for inclusion in compiled regexes.
   *
   * @private
   * @param {string} chr The matched character to escape.
   * @param {string} leadingChar The capture group for a leading character.
   * @param {string} whitespaceChar The capture group for a whitespace character.
   * @returns {string} Returns the escaped character.
   */
  function escapeRegExpChar(chr, leadingChar, whitespaceChar) {
    if (leadingChar) {
      chr = regexpEscapes[chr];
    } else if (whitespaceChar) {
      chr = stringEscapes[chr];
    }
    return '\\' + chr;
  }

  /**
   * Used by `_.template` to escape characters for inclusion in compiled string literals.
   *
   * @private
   * @param {string} chr The matched character to escape.
   * @returns {string} Returns the escaped character.
   */
  function escapeStringChar(chr) {
    return '\\' + stringEscapes[chr];
  }

  /**
   * Gets the index at which the first occurrence of `NaN` is found in `array`.
   *
   * @private
   * @param {Array} array The array to search.
   * @param {number} fromIndex The index to search from.
   * @param {boolean} [fromRight] Specify iterating from right to left.
   * @returns {number} Returns the index of the matched `NaN`, else `-1`.
   */
  function indexOfNaN(array, fromIndex, fromRight) {
    var length = array.length,
        index = fromIndex + (fromRight ? 0 : -1);

    while ((fromRight ? index-- : ++index < length)) {
      var other = array[index];
      if (other !== other) {
        return index;
      }
    }
    return -1;
  }

  /**
   * Checks if `value` is object-like.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
   */
  function isObjectLike(value) {
    return !!value && typeof value == 'object';
  }

  /**
   * Used by `trimmedLeftIndex` and `trimmedRightIndex` to determine if a
   * character code is whitespace.
   *
   * @private
   * @param {number} charCode The character code to inspect.
   * @returns {boolean} Returns `true` if `charCode` is whitespace, else `false`.
   */
  function isSpace(charCode) {
    return ((charCode <= 160 && (charCode >= 9 && charCode <= 13) || charCode == 32 || charCode == 160) || charCode == 5760 || charCode == 6158 ||
      (charCode >= 8192 && (charCode <= 8202 || charCode == 8232 || charCode == 8233 || charCode == 8239 || charCode == 8287 || charCode == 12288 || charCode == 65279)));
  }

  /**
   * Replaces all `placeholder` elements in `array` with an internal placeholder
   * and returns an array of their indexes.
   *
   * @private
   * @param {Array} array The array to modify.
   * @param {*} placeholder The placeholder to replace.
   * @returns {Array} Returns the new array of placeholder indexes.
   */
  function replaceHolders(array, placeholder) {
    var index = -1,
        length = array.length,
        resIndex = -1,
        result = [];

    while (++index < length) {
      if (array[index] === placeholder) {
        array[index] = PLACEHOLDER;
        result[++resIndex] = index;
      }
    }
    return result;
  }

  /**
   * An implementation of `_.uniq` optimized for sorted arrays without support
   * for callback shorthands and `this` binding.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {Function} [iteratee] The function invoked per iteration.
   * @returns {Array} Returns the new duplicate-value-free array.
   */
  function sortedUniq(array, iteratee) {
    var seen,
        index = -1,
        length = array.length,
        resIndex = -1,
        result = [];

    while (++index < length) {
      var value = array[index],
          computed = iteratee ? iteratee(value, index, array) : value;

      if (!index || seen !== computed) {
        seen = computed;
        result[++resIndex] = value;
      }
    }
    return result;
  }

  /**
   * Used by `_.trim` and `_.trimLeft` to get the index of the first non-whitespace
   * character of `string`.
   *
   * @private
   * @param {string} string The string to inspect.
   * @returns {number} Returns the index of the first non-whitespace character.
   */
  function trimmedLeftIndex(string) {
    var index = -1,
        length = string.length;

    while (++index < length && isSpace(string.charCodeAt(index))) {}
    return index;
  }

  /**
   * Used by `_.trim` and `_.trimRight` to get the index of the last non-whitespace
   * character of `string`.
   *
   * @private
   * @param {string} string The string to inspect.
   * @returns {number} Returns the index of the last non-whitespace character.
   */
  function trimmedRightIndex(string) {
    var index = string.length;

    while (index-- && isSpace(string.charCodeAt(index))) {}
    return index;
  }

  /**
   * Used by `_.unescape` to convert HTML entities to characters.
   *
   * @private
   * @param {string} chr The matched character to unescape.
   * @returns {string} Returns the unescaped character.
   */
  function unescapeHtmlChar(chr) {
    return htmlUnescapes[chr];
  }

  /*--------------------------------------------------------------------------*/

  /**
   * Create a new pristine `lodash` function using the given `context` object.
   *
   * @static
   * @memberOf _
   * @category Utility
   * @param {Object} [context=root] The context object.
   * @returns {Function} Returns a new `lodash` function.
   * @example
   *
   * _.mixin({ 'foo': _.constant('foo') });
   *
   * var lodash = _.runInContext();
   * lodash.mixin({ 'bar': lodash.constant('bar') });
   *
   * _.isFunction(_.foo);
   * // => true
   * _.isFunction(_.bar);
   * // => false
   *
   * lodash.isFunction(lodash.foo);
   * // => false
   * lodash.isFunction(lodash.bar);
   * // => true
   *
   * // using `context` to mock `Date#getTime` use in `_.now`
   * var mock = _.runInContext({
   *   'Date': function() {
   *     return { 'getTime': getTimeMock };
   *   }
   * });
   *
   * // or creating a suped-up `defer` in Node.js
   * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
   */
  function runInContext(context) {
    // Avoid issues with some ES3 environments that attempt to use values, named
    // after built-in constructors like `Object`, for the creation of literals.
    // ES5 clears this up by stating that literals must use built-in constructors.
    // See https://es5.github.io/#x11.1.5 for more details.
    context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root;

    /** Native constructor references. */
    var Array = context.Array,
        Date = context.Date,
        Error = context.Error,
        Function = context.Function,
        Math = context.Math,
        Number = context.Number,
        Object = context.Object,
        RegExp = context.RegExp,
        String = context.String,
        TypeError = context.TypeError;

    /** Used for native method references. */
    var arrayProto = Array.prototype,
        objectProto = Object.prototype,
        stringProto = String.prototype;

    /** Used to resolve the decompiled source of functions. */
    var fnToString = Function.prototype.toString;

    /** Used to check objects for own properties. */
    var hasOwnProperty = objectProto.hasOwnProperty;

    /** Used to generate unique IDs. */
    var idCounter = 0;

    /**
     * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
     * of values.
     */
    var objToString = objectProto.toString;

    /** Used to restore the original `_` reference in `_.noConflict`. */
    var oldDash = root._;

    /** Used to detect if a method is native. */
    var reIsNative = RegExp('^' +
      fnToString.call(hasOwnProperty).replace(/[\\^$.*+?()[\]{}|]/g, '\\$&')
      .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
    );

    /** Native method references. */
    var ArrayBuffer = context.ArrayBuffer,
        clearTimeout = context.clearTimeout,
        parseFloat = context.parseFloat,
        pow = Math.pow,
        propertyIsEnumerable = objectProto.propertyIsEnumerable,
        Set = getNative(context, 'Set'),
        setTimeout = context.setTimeout,
        splice = arrayProto.splice,
        Uint8Array = context.Uint8Array,
        WeakMap = getNative(context, 'WeakMap');

    /* Native method references for those with the same name as other `lodash` methods. */
    var nativeCeil = Math.ceil,
        nativeCreate = getNative(Object, 'create'),
        nativeFloor = Math.floor,
        nativeIsArray = getNative(Array, 'isArray'),
        nativeIsFinite = context.isFinite,
        nativeKeys = getNative(Object, 'keys'),
        nativeMax = Math.max,
        nativeMin = Math.min,
        nativeNow = getNative(Date, 'now'),
        nativeParseInt = context.parseInt,
        nativeRandom = Math.random;

    /** Used as references for `-Infinity` and `Infinity`. */
    var NEGATIVE_INFINITY = Number.NEGATIVE_INFINITY,
        POSITIVE_INFINITY = Number.POSITIVE_INFINITY;

    /** Used as references for the maximum length and index of an array. */
    var MAX_ARRAY_LENGTH = 4294967295,
        MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
        HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;

    /**
     * Used as the [maximum length](http://ecma-international.org/ecma-262/6.0/#sec-number.max_safe_integer)
     * of an array-like value.
     */
    var MAX_SAFE_INTEGER = 9007199254740991;

    /** Used to store function metadata. */
    var metaMap = WeakMap && new WeakMap;

    /** Used to lookup unminified function names. */
    var realNames = {};

    /*------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` object which wraps `value` to enable implicit chaining.
     * Methods that operate on and return arrays, collections, and functions can
     * be chained together. Methods that retrieve a single value or may return a
     * primitive value will automatically end the chain returning the unwrapped
     * value. Explicit chaining may be enabled using `_.chain`. The execution of
     * chained methods is lazy, that is, execution is deferred until `_#value`
     * is implicitly or explicitly called.
     *
     * Lazy evaluation allows several methods to support shortcut fusion. Shortcut
     * fusion is an optimization strategy which merge iteratee calls; this can help
     * to avoid the creation of intermediate data structures and greatly reduce the
     * number of iteratee executions.
     *
     * Chaining is supported in custom builds as long as the `_#value` method is
     * directly or indirectly included in the build.
     *
     * In addition to lodash methods, wrappers have `Array` and `String` methods.
     *
     * The wrapper `Array` methods are:
     * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`,
     * `splice`, and `unshift`
     *
     * The wrapper `String` methods are:
     * `replace` and `split`
     *
     * The wrapper methods that support shortcut fusion are:
     * `compact`, `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `filter`,
     * `first`, `initial`, `last`, `map`, `pluck`, `reject`, `rest`, `reverse`,
     * `slice`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `toArray`,
     * and `where`
     *
     * The chainable wrapper methods are:
     * `after`, `ary`, `assign`, `at`, `before`, `bind`, `bindAll`, `bindKey`,
     * `callback`, `chain`, `chunk`, `commit`, `compact`, `concat`, `constant`,
     * `countBy`, `create`, `curry`, `debounce`, `defaults`, `defaultsDeep`,
     * `defer`, `delay`, `difference`, `drop`, `dropRight`, `dropRightWhile`,
     * `dropWhile`, `fill`, `filter`, `flatten`, `flattenDeep`, `flow`, `flowRight`,
     * `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`,
     * `functions`, `groupBy`, `indexBy`, `initial`, `intersection`, `invert`,
     * `invoke`, `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`,
     * `matchesProperty`, `memoize`, `merge`, `method`, `methodOf`, `mixin`,
     * `modArgs`, `negate`, `omit`, `once`, `pairs`, `partial`, `partialRight`,
     * `partition`, `pick`, `plant`, `pluck`, `property`, `propertyOf`, `pull`,
     * `pullAt`, `push`, `range`, `rearg`, `reject`, `remove`, `rest`, `restParam`,
     * `reverse`, `set`, `shuffle`, `slice`, `sort`, `sortBy`, `sortByAll`,
     * `sortByOrder`, `splice`, `spread`, `take`, `takeRight`, `takeRightWhile`,
     * `takeWhile`, `tap`, `throttle`, `thru`, `times`, `toArray`, `toPlainObject`,
     * `transform`, `union`, `uniq`, `unshift`, `unzip`, `unzipWith`, `values`,
     * `valuesIn`, `where`, `without`, `wrap`, `xor`, `zip`, `zipObject`, `zipWith`
     *
     * The wrapper methods that are **not** chainable by default are:
     * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clone`, `cloneDeep`,
     * `deburr`, `endsWith`, `escape`, `escapeRegExp`, `every`, `find`, `findIndex`,
     * `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `findWhere`, `first`,
     * `floor`, `get`, `gt`, `gte`, `has`, `identity`, `includes`, `indexOf`,
     * `inRange`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`,
     * `isEmpty`, `isEqual`, `isError`, `isFinite` `isFunction`, `isMatch`,
     * `isNative`, `isNaN`, `isNull`, `isNumber`, `isObject`, `isPlainObject`,
     * `isRegExp`, `isString`, `isUndefined`, `isTypedArray`, `join`, `kebabCase`,
     * `last`, `lastIndexOf`, `lt`, `lte`, `max`, `min`, `noConflict`, `noop`,
     * `now`, `pad`, `padLeft`, `padRight`, `parseInt`, `pop`, `random`, `reduce`,
     * `reduceRight`, `repeat`, `result`, `round`, `runInContext`, `shift`, `size`,
     * `snakeCase`, `some`, `sortedIndex`, `sortedLastIndex`, `startCase`,
     * `startsWith`, `sum`, `template`, `trim`, `trimLeft`, `trimRight`, `trunc`,
     * `unescape`, `uniqueId`, `value`, and `words`
     *
     * The wrapper method `sample` will return a wrapped value when `n` is provided,
     * otherwise an unwrapped value is returned.
     *
     * @name _
     * @constructor
     * @category Chain
     * @param {*} value The value to wrap in a `lodash` instance.
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var wrapped = _([1, 2, 3]);
     *
     * // returns an unwrapped value
     * wrapped.reduce(function(total, n) {
     *   return total + n;
     * });
     * // => 6
     *
     * // returns a wrapped value
     * var squares = wrapped.map(function(n) {
     *   return n * n;
     * });
     *
     * _.isArray(squares);
     * // => false
     *
     * _.isArray(squares.value());
     * // => true
     */
    function lodash(value) {
      if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
        if (value instanceof LodashWrapper) {
          return value;
        }
        if (hasOwnProperty.call(value, '__chain__') && hasOwnProperty.call(value, '__wrapped__')) {
          return wrapperClone(value);
        }
      }
      return new LodashWrapper(value);
    }

    /**
     * The function whose prototype all chaining wrappers inherit from.
     *
     * @private
     */
    function baseLodash() {
      // No operation performed.
    }

    /**
     * The base constructor for creating `lodash` wrapper objects.
     *
     * @private
     * @param {*} value The value to wrap.
     * @param {boolean} [chainAll] Enable chaining for all wrapper methods.
     * @param {Array} [actions=[]] Actions to peform to resolve the unwrapped value.
     */
    function LodashWrapper(value, chainAll, actions) {
      this.__wrapped__ = value;
      this.__actions__ = actions || [];
      this.__chain__ = !!chainAll;
    }

    /**
     * An object environment feature flags.
     *
     * @static
     * @memberOf _
     * @type Object
     */
    var support = lodash.support = {};

    /**
     * By default, the template delimiters used by lodash are like those in
     * embedded Ruby (ERB). Change the following template settings to use
     * alternative delimiters.
     *
     * @static
     * @memberOf _
     * @type Object
     */
    lodash.templateSettings = {

      /**
       * Used to detect `data` property values to be HTML-escaped.
       *
       * @memberOf _.templateSettings
       * @type RegExp
       */
      'escape': reEscape,

      /**
       * Used to detect code to be evaluated.
       *
       * @memberOf _.templateSettings
       * @type RegExp
       */
      'evaluate': reEvaluate,

      /**
       * Used to detect `data` property values to inject.
       *
       * @memberOf _.templateSettings
       * @type RegExp
       */
      'interpolate': reInterpolate,

      /**
       * Used to reference the data object in the template text.
       *
       * @memberOf _.templateSettings
       * @type string
       */
      'variable': '',

      /**
       * Used to import variables into the compiled template.
       *
       * @memberOf _.templateSettings
       * @type Object
       */
      'imports': {

        /**
         * A reference to the `lodash` function.
         *
         * @memberOf _.templateSettings.imports
         * @type Function
         */
        '_': lodash
      }
    };

    /*------------------------------------------------------------------------*/

    /**
     * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
     *
     * @private
     * @param {*} value The value to wrap.
     */
    function LazyWrapper(value) {
      this.__wrapped__ = value;
      this.__actions__ = [];
      this.__dir__ = 1;
      this.__filtered__ = false;
      this.__iteratees__ = [];
      this.__takeCount__ = POSITIVE_INFINITY;
      this.__views__ = [];
    }

    /**
     * Creates a clone of the lazy wrapper object.
     *
     * @private
     * @name clone
     * @memberOf LazyWrapper
     * @returns {Object} Returns the cloned `LazyWrapper` object.
     */
    function lazyClone() {
      var result = new LazyWrapper(this.__wrapped__);
      result.__actions__ = arrayCopy(this.__actions__);
      result.__dir__ = this.__dir__;
      result.__filtered__ = this.__filtered__;
      result.__iteratees__ = arrayCopy(this.__iteratees__);
      result.__takeCount__ = this.__takeCount__;
      result.__views__ = arrayCopy(this.__views__);
      return result;
    }

    /**
     * Reverses the direction of lazy iteration.
     *
     * @private
     * @name reverse
     * @memberOf LazyWrapper
     * @returns {Object} Returns the new reversed `LazyWrapper` object.
     */
    function lazyReverse() {
      if (this.__filtered__) {
        var result = new LazyWrapper(this);
        result.__dir__ = -1;
        result.__filtered__ = true;
      } else {
        result = this.clone();
        result.__dir__ *= -1;
      }
      return result;
    }

    /**
     * Extracts the unwrapped value from its lazy wrapper.
     *
     * @private
     * @name value
     * @memberOf LazyWrapper
     * @returns {*} Returns the unwrapped value.
     */
    function lazyValue() {
      var array = this.__wrapped__.value(),
          dir = this.__dir__,
          isArr = isArray(array),
          isRight = dir < 0,
          arrLength = isArr ? array.length : 0,
          view = getView(0, arrLength, this.__views__),
          start = view.start,
          end = view.end,
          length = end - start,
          index = isRight ? end : (start - 1),
          iteratees = this.__iteratees__,
          iterLength = iteratees.length,
          resIndex = 0,
          takeCount = nativeMin(length, this.__takeCount__);

      if (!isArr || arrLength < LARGE_ARRAY_SIZE || (arrLength == length && takeCount == length)) {
        return baseWrapperValue((isRight && isArr) ? array.reverse() : array, this.__actions__);
      }
      var result = [];

      outer:
      while (length-- && resIndex < takeCount) {
        index += dir;

        var iterIndex = -1,
            value = array[index];

        while (++iterIndex < iterLength) {
          var data = iteratees[iterIndex],
              iteratee = data.iteratee,
              type = data.type,
              computed = iteratee(value);

          if (type == LAZY_MAP_FLAG) {
            value = computed;
          } else if (!computed) {
            if (type == LAZY_FILTER_FLAG) {
              continue outer;
            } else {
              break outer;
            }
          }
        }
        result[resIndex++] = value;
      }
      return result;
    }

    /*------------------------------------------------------------------------*/

    /**
     * Creates a cache object to store key/value pairs.
     *
     * @private
     * @static
     * @name Cache
     * @memberOf _.memoize
     */
    function MapCache() {
      this.__data__ = {};
    }

    /**
     * Removes `key` and its value from the cache.
     *
     * @private
     * @name delete
     * @memberOf _.memoize.Cache
     * @param {string} key The key of the value to remove.
     * @returns {boolean} Returns `true` if the entry was removed successfully, else `false`.
     */
    function mapDelete(key) {
      return this.has(key) && delete this.__data__[key];
    }

    /**
     * Gets the cached value for `key`.
     *
     * @private
     * @name get
     * @memberOf _.memoize.Cache
     * @param {string} key The key of the value to get.
     * @returns {*} Returns the cached value.
     */
    function mapGet(key) {
      return key == '__proto__' ? undefined : this.__data__[key];
    }

    /**
     * Checks if a cached value for `key` exists.
     *
     * @private
     * @name has
     * @memberOf _.memoize.Cache
     * @param {string} key The key of the entry to check.
     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
     */
    function mapHas(key) {
      return key != '__proto__' && hasOwnProperty.call(this.__data__, key);
    }

    /**
     * Sets `value` to `key` of the cache.
     *
     * @private
     * @name set
     * @memberOf _.memoize.Cache
     * @param {string} key The key of the value to cache.
     * @param {*} value The value to cache.
     * @returns {Object} Returns the cache object.
     */
    function mapSet(key, value) {
      if (key != '__proto__') {
        this.__data__[key] = value;
      }
      return this;
    }

    /*------------------------------------------------------------------------*/

    /**
     *
     * Creates a cache object to store unique values.
     *
     * @private
     * @param {Array} [values] The values to cache.
     */
    function SetCache(values) {
      var length = values ? values.length : 0;

      this.data = { 'hash': nativeCreate(null), 'set': new Set };
      while (length--) {
        this.push(values[length]);
      }
    }

    /**
     * Checks if `value` is in `cache` mimicking the return signature of
     * `_.indexOf` by returning `0` if the value is found, else `-1`.
     *
     * @private
     * @param {Object} cache The cache to search.
     * @param {*} value The value to search for.
     * @returns {number} Returns `0` if `value` is found, else `-1`.
     */
    function cacheIndexOf(cache, value) {
      var data = cache.data,
          result = (typeof value == 'string' || isObject(value)) ? data.set.has(value) : data.hash[value];

      return result ? 0 : -1;
    }

    /**
     * Adds `value` to the cache.
     *
     * @private
     * @name push
     * @memberOf SetCache
     * @param {*} value The value to cache.
     */
    function cachePush(value) {
      var data = this.data;
      if (typeof value == 'string' || isObject(value)) {
        data.set.add(value);
      } else {
        data.hash[value] = true;
      }
    }

    /*------------------------------------------------------------------------*/

    /**
     * Creates a new array joining `array` with `other`.
     *
     * @private
     * @param {Array} array The array to join.
     * @param {Array} other The other array to join.
     * @returns {Array} Returns the new concatenated array.
     */
    function arrayConcat(array, other) {
      var index = -1,
          length = array.length,
          othIndex = -1,
          othLength = other.length,
          result = Array(length + othLength);

      while (++index < length) {
        result[index] = array[index];
      }
      while (++othIndex < othLength) {
        result[index++] = other[othIndex];
      }
      return result;
    }

    /**
     * Copies the values of `source` to `array`.
     *
     * @private
     * @param {Array} source The array to copy values from.
     * @param {Array} [array=[]] The array to copy values to.
     * @returns {Array} Returns `array`.
     */
    function arrayCopy(source, array) {
      var index = -1,
          length = source.length;

      array || (array = Array(length));
      while (++index < length) {
        array[index] = source[index];
      }
      return array;
    }

    /**
     * A specialized version of `_.forEach` for arrays without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array} Returns `array`.
     */
    function arrayEach(array, iteratee) {
      var index = -1,
          length = array.length;

      while (++index < length) {
        if (iteratee(array[index], index, array) === false) {
          break;
        }
      }
      return array;
    }

    /**
     * A specialized version of `_.forEachRight` for arrays without support for
     * callback shorthands and `this` binding.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array} Returns `array`.
     */
    function arrayEachRight(array, iteratee) {
      var length = array.length;

      while (length--) {
        if (iteratee(array[length], length, array) === false) {
          break;
        }
      }
      return array;
    }

    /**
     * A specialized version of `_.every` for arrays without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {boolean} Returns `true` if all elements pass the predicate check,
     *  else `false`.
     */
    function arrayEvery(array, predicate) {
      var index = -1,
          length = array.length;

      while (++index < length) {
        if (!predicate(array[index], index, array)) {
          return false;
        }
      }
      return true;
    }

    /**
     * A specialized version of `baseExtremum` for arrays which invokes `iteratee`
     * with one argument: (value).
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {Function} comparator The function used to compare values.
     * @param {*} exValue The initial extremum value.
     * @returns {*} Returns the extremum value.
     */
    function arrayExtremum(array, iteratee, comparator, exValue) {
      var index = -1,
          length = array.length,
          computed = exValue,
          result = computed;

      while (++index < length) {
        var value = array[index],
            current = +iteratee(value);

        if (comparator(current, computed)) {
          computed = current;
          result = value;
        }
      }
      return result;
    }

    /**
     * A specialized version of `_.filter` for arrays without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {Array} Returns the new filtered array.
     */
    function arrayFilter(array, predicate) {
      var index = -1,
          length = array.length,
          resIndex = -1,
          result = [];

      while (++index < length) {
        var value = array[index];
        if (predicate(value, index, array)) {
          result[++resIndex] = value;
        }
      }
      return result;
    }

    /**
     * A specialized version of `_.map` for arrays without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array} Returns the new mapped array.
     */
    function arrayMap(array, iteratee) {
      var index = -1,
          length = array.length,
          result = Array(length);

      while (++index < length) {
        result[index] = iteratee(array[index], index, array);
      }
      return result;
    }

    /**
     * Appends the elements of `values` to `array`.
     *
     * @private
     * @param {Array} array The array to modify.
     * @param {Array} values The values to append.
     * @returns {Array} Returns `array`.
     */
    function arrayPush(array, values) {
      var index = -1,
          length = values.length,
          offset = array.length;

      while (++index < length) {
        array[offset + index] = values[index];
      }
      return array;
    }

    /**
     * A specialized version of `_.reduce` for arrays without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {*} [accumulator] The initial value.
     * @param {boolean} [initFromArray] Specify using the first element of `array`
     *  as the initial value.
     * @returns {*} Returns the accumulated value.
     */
    function arrayReduce(array, iteratee, accumulator, initFromArray) {
      var index = -1,
          length = array.length;

      if (initFromArray && length) {
        accumulator = array[++index];
      }
      while (++index < length) {
        accumulator = iteratee(accumulator, array[index], index, array);
      }
      return accumulator;
    }

    /**
     * A specialized version of `_.reduceRight` for arrays without support for
     * callback shorthands and `this` binding.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {*} [accumulator] The initial value.
     * @param {boolean} [initFromArray] Specify using the last element of `array`
     *  as the initial value.
     * @returns {*} Returns the accumulated value.
     */
    function arrayReduceRight(array, iteratee, accumulator, initFromArray) {
      var length = array.length;
      if (initFromArray && length) {
        accumulator = array[--length];
      }
      while (length--) {
        accumulator = iteratee(accumulator, array[length], length, array);
      }
      return accumulator;
    }

    /**
     * A specialized version of `_.some` for arrays without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {boolean} Returns `true` if any element passes the predicate check,
     *  else `false`.
     */
    function arraySome(array, predicate) {
      var index = -1,
          length = array.length;

      while (++index < length) {
        if (predicate(array[index], index, array)) {
          return true;
        }
      }
      return false;
    }

    /**
     * A specialized version of `_.sum` for arrays without support for callback
     * shorthands and `this` binding..
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {number} Returns the sum.
     */
    function arraySum(array, iteratee) {
      var length = array.length,
          result = 0;

      while (length--) {
        result += +iteratee(array[length]) || 0;
      }
      return result;
    }

    /**
     * Used by `_.defaults` to customize its `_.assign` use.
     *
     * @private
     * @param {*} objectValue The destination object property value.
     * @param {*} sourceValue The source object property value.
     * @returns {*} Returns the value to assign to the destination object.
     */
    function assignDefaults(objectValue, sourceValue) {
      return objectValue === undefined ? sourceValue : objectValue;
    }

    /**
     * Used by `_.template` to customize its `_.assign` use.
     *
     * **Note:** This function is like `assignDefaults` except that it ignores
     * inherited property values when checking if a property is `undefined`.
     *
     * @private
     * @param {*} objectValue The destination object property value.
     * @param {*} sourceValue The source object property value.
     * @param {string} key The key associated with the object and source values.
     * @param {Object} object The destination object.
     * @returns {*} Returns the value to assign to the destination object.
     */
    function assignOwnDefaults(objectValue, sourceValue, key, object) {
      return (objectValue === undefined || !hasOwnProperty.call(object, key))
        ? sourceValue
        : objectValue;
    }

    /**
     * A specialized version of `_.assign` for customizing assigned values without
     * support for argument juggling, multiple sources, and `this` binding `customizer`
     * functions.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @param {Function} customizer The function to customize assigned values.
     * @returns {Object} Returns `object`.
     */
    function assignWith(object, source, customizer) {
      var index = -1,
          props = keys(source),
          length = props.length;

      while (++index < length) {
        var key = props[index],
            value = object[key],
            result = customizer(value, source[key], key, object, source);

        if ((result === result ? (result !== value) : (value === value)) ||
            (value === undefined && !(key in object))) {
          object[key] = result;
        }
      }
      return object;
    }

    /**
     * The base implementation of `_.assign` without support for argument juggling,
     * multiple sources, and `customizer` functions.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @returns {Object} Returns `object`.
     */
    function baseAssign(object, source) {
      return source == null
        ? object
        : baseCopy(source, keys(source), object);
    }

    /**
     * The base implementation of `_.at` without support for string collections
     * and individual key arguments.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {number[]|string[]} props The property names or indexes of elements to pick.
     * @returns {Array} Returns the new array of picked elements.
     */
    function baseAt(collection, props) {
      var index = -1,
          isNil = collection == null,
          isArr = !isNil && isArrayLike(collection),
          length = isArr ? collection.length : 0,
          propsLength = props.length,
          result = Array(propsLength);

      while(++index < propsLength) {
        var key = props[index];
        if (isArr) {
          result[index] = isIndex(key, length) ? collection[key] : undefined;
        } else {
          result[index] = isNil ? undefined : collection[key];
        }
      }
      return result;
    }

    /**
     * Copies properties of `source` to `object`.
     *
     * @private
     * @param {Object} source The object to copy properties from.
     * @param {Array} props The property names to copy.
     * @param {Object} [object={}] The object to copy properties to.
     * @returns {Object} Returns `object`.
     */
    function baseCopy(source, props, object) {
      object || (object = {});

      var index = -1,
          length = props.length;

      while (++index < length) {
        var key = props[index];
        object[key] = source[key];
      }
      return object;
    }

    /**
     * The base implementation of `_.callback` which supports specifying the
     * number of arguments to provide to `func`.
     *
     * @private
     * @param {*} [func=_.identity] The value to convert to a callback.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {number} [argCount] The number of arguments to provide to `func`.
     * @returns {Function} Returns the callback.
     */
    function baseCallback(func, thisArg, argCount) {
      var type = typeof func;
      if (type == 'function') {
        return thisArg === undefined
          ? func
          : bindCallback(func, thisArg, argCount);
      }
      if (func == null) {
        return identity;
      }
      if (type == 'object') {
        return baseMatches(func);
      }
      return thisArg === undefined
        ? property(func)
        : baseMatchesProperty(func, thisArg);
    }

    /**
     * The base implementation of `_.clone` without support for argument juggling
     * and `this` binding `customizer` functions.
     *
     * @private
     * @param {*} value The value to clone.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @param {Function} [customizer] The function to customize cloning values.
     * @param {string} [key] The key of `value`.
     * @param {Object} [object] The object `value` belongs to.
     * @param {Array} [stackA=[]] Tracks traversed source objects.
     * @param {Array} [stackB=[]] Associates clones with source counterparts.
     * @returns {*} Returns the cloned value.
     */
    function baseClone(value, isDeep, customizer, key, object, stackA, stackB) {
      var result;
      if (customizer) {
        result = object ? customizer(value, key, object) : customizer(value);
      }
      if (result !== undefined) {
        return result;
      }
      if (!isObject(value)) {
        return value;
      }
      var isArr = isArray(value);
      if (isArr) {
        result = initCloneArray(value);
        if (!isDeep) {
          return arrayCopy(value, result);
        }
      } else {
        var tag = objToString.call(value),
            isFunc = tag == funcTag;

        if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
          result = initCloneObject(isFunc ? {} : value);
          if (!isDeep) {
            return baseAssign(result, value);
          }
        } else {
          return cloneableTags[tag]
            ? initCloneByTag(value, tag, isDeep)
            : (object ? value : {});
        }
      }
      // Check for circular references and return its corresponding clone.
      stackA || (stackA = []);
      stackB || (stackB = []);

      var length = stackA.length;
      while (length--) {
        if (stackA[length] == value) {
          return stackB[length];
        }
      }
      // Add the source value to the stack of traversed objects and associate it with its clone.
      stackA.push(value);
      stackB.push(result);

      // Recursively populate clone (susceptible to call stack limits).
      (isArr ? arrayEach : baseForOwn)(value, function(subValue, key) {
        result[key] = baseClone(subValue, isDeep, customizer, key, value, stackA, stackB);
      });
      return result;
    }

    /**
     * The base implementation of `_.create` without support for assigning
     * properties to the created object.
     *
     * @private
     * @param {Object} prototype The object to inherit from.
     * @returns {Object} Returns the new object.
     */
    var baseCreate = (function() {
      function object() {}
      return function(prototype) {
        if (isObject(prototype)) {
          object.prototype = prototype;
          var result = new object;
          object.prototype = undefined;
        }
        return result || {};
      };
    }());

    /**
     * The base implementation of `_.delay` and `_.defer` which accepts an index
     * of where to slice the arguments to provide to `func`.
     *
     * @private
     * @param {Function} func The function to delay.
     * @param {number} wait The number of milliseconds to delay invocation.
     * @param {Object} args The arguments provide to `func`.
     * @returns {number} Returns the timer id.
     */
    function baseDelay(func, wait, args) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      return setTimeout(function() { func.apply(undefined, args); }, wait);
    }

    /**
     * The base implementation of `_.difference` which accepts a single array
     * of values to exclude.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {Array} values The values to exclude.
     * @returns {Array} Returns the new array of filtered values.
     */
    function baseDifference(array, values) {
      var length = array ? array.length : 0,
          result = [];

      if (!length) {
        return result;
      }
      var index = -1,
          indexOf = getIndexOf(),
          isCommon = indexOf == baseIndexOf,
          cache = (isCommon && values.length >= LARGE_ARRAY_SIZE) ? createCache(values) : null,
          valuesLength = values.length;

      if (cache) {
        indexOf = cacheIndexOf;
        isCommon = false;
        values = cache;
      }
      outer:
      while (++index < length) {
        var value = array[index];

        if (isCommon && value === value) {
          var valuesIndex = valuesLength;
          while (valuesIndex--) {
            if (values[valuesIndex] === value) {
              continue outer;
            }
          }
          result.push(value);
        }
        else if (indexOf(values, value, 0) < 0) {
          result.push(value);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.forEach` without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array|Object|string} Returns `collection`.
     */
    var baseEach = createBaseEach(baseForOwn);

    /**
     * The base implementation of `_.forEachRight` without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array|Object|string} Returns `collection`.
     */
    var baseEachRight = createBaseEach(baseForOwnRight, true);

    /**
     * The base implementation of `_.every` without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {boolean} Returns `true` if all elements pass the predicate check,
     *  else `false`
     */
    function baseEvery(collection, predicate) {
      var result = true;
      baseEach(collection, function(value, index, collection) {
        result = !!predicate(value, index, collection);
        return result;
      });
      return result;
    }

    /**
     * Gets the extremum value of `collection` invoking `iteratee` for each value
     * in `collection` to generate the criterion by which the value is ranked.
     * The `iteratee` is invoked with three arguments: (value, index|key, collection).
     *
     * @private
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {Function} comparator The function used to compare values.
     * @param {*} exValue The initial extremum value.
     * @returns {*} Returns the extremum value.
     */
    function baseExtremum(collection, iteratee, comparator, exValue) {
      var computed = exValue,
          result = computed;

      baseEach(collection, function(value, index, collection) {
        var current = +iteratee(value, index, collection);
        if (comparator(current, computed) || (current === exValue && current === result)) {
          computed = current;
          result = value;
        }
      });
      return result;
    }

    /**
     * The base implementation of `_.fill` without an iteratee call guard.
     *
     * @private
     * @param {Array} array The array to fill.
     * @param {*} value The value to fill `array` with.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns `array`.
     */
    function baseFill(array, value, start, end) {
      var length = array.length;

      start = start == null ? 0 : (+start || 0);
      if (start < 0) {
        start = -start > length ? 0 : (length + start);
      }
      end = (end === undefined || end > length) ? length : (+end || 0);
      if (end < 0) {
        end += length;
      }
      length = start > end ? 0 : (end >>> 0);
      start >>>= 0;

      while (start < length) {
        array[start++] = value;
      }
      return array;
    }

    /**
     * The base implementation of `_.filter` without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {Array} Returns the new filtered array.
     */
    function baseFilter(collection, predicate) {
      var result = [];
      baseEach(collection, function(value, index, collection) {
        if (predicate(value, index, collection)) {
          result.push(value);
        }
      });
      return result;
    }

    /**
     * The base implementation of `_.find`, `_.findLast`, `_.findKey`, and `_.findLastKey`,
     * without support for callback shorthands and `this` binding, which iterates
     * over `collection` using the provided `eachFunc`.
     *
     * @private
     * @param {Array|Object|string} collection The collection to search.
     * @param {Function} predicate The function invoked per iteration.
     * @param {Function} eachFunc The function to iterate over `collection`.
     * @param {boolean} [retKey] Specify returning the key of the found element
     *  instead of the element itself.
     * @returns {*} Returns the found element or its key, else `undefined`.
     */
    function baseFind(collection, predicate, eachFunc, retKey) {
      var result;
      eachFunc(collection, function(value, key, collection) {
        if (predicate(value, key, collection)) {
          result = retKey ? key : value;
          return false;
        }
      });
      return result;
    }

    /**
     * The base implementation of `_.flatten` with added support for restricting
     * flattening and specifying the start index.
     *
     * @private
     * @param {Array} array The array to flatten.
     * @param {boolean} [isDeep] Specify a deep flatten.
     * @param {boolean} [isStrict] Restrict flattening to arrays-like objects.
     * @param {Array} [result=[]] The initial result value.
     * @returns {Array} Returns the new flattened array.
     */
    function baseFlatten(array, isDeep, isStrict, result) {
      result || (result = []);

      var index = -1,
          length = array.length;

      while (++index < length) {
        var value = array[index];
        if (isObjectLike(value) && isArrayLike(value) &&
            (isStrict || isArray(value) || isArguments(value))) {
          if (isDeep) {
            // Recursively flatten arrays (susceptible to call stack limits).
            baseFlatten(value, isDeep, isStrict, result);
          } else {
            arrayPush(result, value);
          }
        } else if (!isStrict) {
          result[result.length] = value;
        }
      }
      return result;
    }

    /**
     * The base implementation of `baseForIn` and `baseForOwn` which iterates
     * over `object` properties returned by `keysFunc` invoking `iteratee` for
     * each property. Iteratee functions may exit iteration early by explicitly
     * returning `false`.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {Function} keysFunc The function to get the keys of `object`.
     * @returns {Object} Returns `object`.
     */
    var baseFor = createBaseFor();

    /**
     * This function is like `baseFor` except that it iterates over properties
     * in the opposite order.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {Function} keysFunc The function to get the keys of `object`.
     * @returns {Object} Returns `object`.
     */
    var baseForRight = createBaseFor(true);

    /**
     * The base implementation of `_.forIn` without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Object} Returns `object`.
     */
    function baseForIn(object, iteratee) {
      return baseFor(object, iteratee, keysIn);
    }

    /**
     * The base implementation of `_.forOwn` without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Object} Returns `object`.
     */
    function baseForOwn(object, iteratee) {
      return baseFor(object, iteratee, keys);
    }

    /**
     * The base implementation of `_.forOwnRight` without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Object} Returns `object`.
     */
    function baseForOwnRight(object, iteratee) {
      return baseForRight(object, iteratee, keys);
    }

    /**
     * The base implementation of `_.functions` which creates an array of
     * `object` function property names filtered from those provided.
     *
     * @private
     * @param {Object} object The object to inspect.
     * @param {Array} props The property names to filter.
     * @returns {Array} Returns the new array of filtered property names.
     */
    function baseFunctions(object, props) {
      var index = -1,
          length = props.length,
          resIndex = -1,
          result = [];

      while (++index < length) {
        var key = props[index];
        if (isFunction(object[key])) {
          result[++resIndex] = key;
        }
      }
      return result;
    }

    /**
     * The base implementation of `get` without support for string paths
     * and default values.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array} path The path of the property to get.
     * @param {string} [pathKey] The key representation of path.
     * @returns {*} Returns the resolved value.
     */
    function baseGet(object, path, pathKey) {
      if (object == null) {
        return;
      }
      if (pathKey !== undefined && pathKey in toObject(object)) {
        path = [pathKey];
      }
      var index = 0,
          length = path.length;

      while (object != null && index < length) {
        object = object[path[index++]];
      }
      return (index && index == length) ? object : undefined;
    }

    /**
     * The base implementation of `_.isEqual` without support for `this` binding
     * `customizer` functions.
     *
     * @private
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @param {Function} [customizer] The function to customize comparing values.
     * @param {boolean} [isLoose] Specify performing partial comparisons.
     * @param {Array} [stackA] Tracks traversed `value` objects.
     * @param {Array} [stackB] Tracks traversed `other` objects.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     */
    function baseIsEqual(value, other, customizer, isLoose, stackA, stackB) {
      if (value === other) {
        return true;
      }
      if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
        return value !== value && other !== other;
      }
      return baseIsEqualDeep(value, other, baseIsEqual, customizer, isLoose, stackA, stackB);
    }

    /**
     * A specialized version of `baseIsEqual` for arrays and objects which performs
     * deep comparisons and tracks traversed objects enabling objects with circular
     * references to be compared.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Function} [customizer] The function to customize comparing objects.
     * @param {boolean} [isLoose] Specify performing partial comparisons.
     * @param {Array} [stackA=[]] Tracks traversed `value` objects.
     * @param {Array} [stackB=[]] Tracks traversed `other` objects.
     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
     */
    function baseIsEqualDeep(object, other, equalFunc, customizer, isLoose, stackA, stackB) {
      var objIsArr = isArray(object),
          othIsArr = isArray(other),
          objTag = arrayTag,
          othTag = arrayTag;

      if (!objIsArr) {
        objTag = objToString.call(object);
        if (objTag == argsTag) {
          objTag = objectTag;
        } else if (objTag != objectTag) {
          objIsArr = isTypedArray(object);
        }
      }
      if (!othIsArr) {
        othTag = objToString.call(other);
        if (othTag == argsTag) {
          othTag = objectTag;
        } else if (othTag != objectTag) {
          othIsArr = isTypedArray(other);
        }
      }
      var objIsObj = objTag == objectTag,
          othIsObj = othTag == objectTag,
          isSameTag = objTag == othTag;

      if (isSameTag && !(objIsArr || objIsObj)) {
        return equalByTag(object, other, objTag);
      }
      if (!isLoose) {
        var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
            othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');

        if (objIsWrapped || othIsWrapped) {
          return equalFunc(objIsWrapped ? object.value() : object, othIsWrapped ? other.value() : other, customizer, isLoose, stackA, stackB);
        }
      }
      if (!isSameTag) {
        return false;
      }
      // Assume cyclic values are equal.
      // For more information on detecting circular references see https://es5.github.io/#JO.
      stackA || (stackA = []);
      stackB || (stackB = []);

      var length = stackA.length;
      while (length--) {
        if (stackA[length] == object) {
          return stackB[length] == other;
        }
      }
      // Add `object` and `other` to the stack of traversed objects.
      stackA.push(object);
      stackB.push(other);

      var result = (objIsArr ? equalArrays : equalObjects)(object, other, equalFunc, customizer, isLoose, stackA, stackB);

      stackA.pop();
      stackB.pop();

      return result;
    }

    /**
     * The base implementation of `_.isMatch` without support for callback
     * shorthands and `this` binding.
     *
     * @private
     * @param {Object} object The object to inspect.
     * @param {Array} matchData The propery names, values, and compare flags to match.
     * @param {Function} [customizer] The function to customize comparing objects.
     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
     */
    function baseIsMatch(object, matchData, customizer) {
      var index = matchData.length,
          length = index,
          noCustomizer = !customizer;

      if (object == null) {
        return !length;
      }
      object = toObject(object);
      while (index--) {
        var data = matchData[index];
        if ((noCustomizer && data[2])
              ? data[1] !== object[data[0]]
              : !(data[0] in object)
            ) {
          return false;
        }
      }
      while (++index < length) {
        data = matchData[index];
        var key = data[0],
            objValue = object[key],
            srcValue = data[1];

        if (noCustomizer && data[2]) {
          if (objValue === undefined && !(key in object)) {
            return false;
          }
        } else {
          var result = customizer ? customizer(objValue, srcValue, key) : undefined;
          if (!(result === undefined ? baseIsEqual(srcValue, objValue, customizer, true) : result)) {
            return false;
          }
        }
      }
      return true;
    }

    /**
     * The base implementation of `_.map` without support for callback shorthands
     * and `this` binding.
     *
     * @private
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array} Returns the new mapped array.
     */
    function baseMap(collection, iteratee) {
      var index = -1,
          result = isArrayLike(collection) ? Array(collection.length) : [];

      baseEach(collection, function(value, key, collection) {
        result[++index] = iteratee(value, key, collection);
      });
      return result;
    }

    /**
     * The base implementation of `_.matches` which does not clone `source`.
     *
     * @private
     * @param {Object} source The object of property values to match.
     * @returns {Function} Returns the new function.
     */
    function baseMatches(source) {
      var matchData = getMatchData(source);
      if (matchData.length == 1 && matchData[0][2]) {
        var key = matchData[0][0],
            value = matchData[0][1];

        return function(object) {
          if (object == null) {
            return false;
          }
          return object[key] === value && (value !== undefined || (key in toObject(object)));
        };
      }
      return function(object) {
        return baseIsMatch(object, matchData);
      };
    }

    /**
     * The base implementation of `_.matchesProperty` which does not clone `srcValue`.
     *
     * @private
     * @param {string} path The path of the property to get.
     * @param {*} srcValue The value to compare.
     * @returns {Function} Returns the new function.
     */
    function baseMatchesProperty(path, srcValue) {
      var isArr = isArray(path),
          isCommon = isKey(path) && isStrictComparable(srcValue),
          pathKey = (path + '');

      path = toPath(path);
      return function(object) {
        if (object == null) {
          return false;
        }
        var key = pathKey;
        object = toObject(object);
        if ((isArr || !isCommon) && !(key in object)) {
          object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
          if (object == null) {
            return false;
          }
          key = last(path);
          object = toObject(object);
        }
        return object[key] === srcValue
          ? (srcValue !== undefined || (key in object))
          : baseIsEqual(srcValue, object[key], undefined, true);
      };
    }

    /**
     * The base implementation of `_.merge` without support for argument juggling,
     * multiple sources, and `this` binding `customizer` functions.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @param {Function} [customizer] The function to customize merged values.
     * @param {Array} [stackA=[]] Tracks traversed source objects.
     * @param {Array} [stackB=[]] Associates values with source counterparts.
     * @returns {Object} Returns `object`.
     */
    function baseMerge(object, source, customizer, stackA, stackB) {
      if (!isObject(object)) {
        return object;
      }
      var isSrcArr = isArrayLike(source) && (isArray(source) || isTypedArray(source)),
          props = isSrcArr ? undefined : keys(source);

      arrayEach(props || source, function(srcValue, key) {
        if (props) {
          key = srcValue;
          srcValue = source[key];
        }
        if (isObjectLike(srcValue)) {
          stackA || (stackA = []);
          stackB || (stackB = []);
          baseMergeDeep(object, source, key, baseMerge, customizer, stackA, stackB);
        }
        else {
          var value = object[key],
              result = customizer ? customizer(value, srcValue, key, object, source) : undefined,
              isCommon = result === undefined;

          if (isCommon) {
            result = srcValue;
          }
          if ((result !== undefined || (isSrcArr && !(key in object))) &&
              (isCommon || (result === result ? (result !== value) : (value === value)))) {
            object[key] = result;
          }
        }
      });
      return object;
    }

    /**
     * A specialized version of `baseMerge` for arrays and objects which performs
     * deep merges and tracks traversed objects enabling objects with circular
     * references to be merged.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @param {string} key The key of the value to merge.
     * @param {Function} mergeFunc The function to merge values.
     * @param {Function} [customizer] The function to customize merged values.
     * @param {Array} [stackA=[]] Tracks traversed source objects.
     * @param {Array} [stackB=[]] Associates values with source counterparts.
     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
     */
    function baseMergeDeep(object, source, key, mergeFunc, customizer, stackA, stackB) {
      var length = stackA.length,
          srcValue = source[key];

      while (length--) {
        if (stackA[length] == srcValue) {
          object[key] = stackB[length];
          return;
        }
      }
      var value = object[key],
          result = customizer ? customizer(value, srcValue, key, object, source) : undefined,
          isCommon = result === undefined;

      if (isCommon) {
        result = srcValue;
        if (isArrayLike(srcValue) && (isArray(srcValue) || isTypedArray(srcValue))) {
          result = isArray(value)
            ? value
            : (isArrayLike(value) ? arrayCopy(value) : []);
        }
        else if (isPlainObject(srcValue) || isArguments(srcValue)) {
          result = isArguments(value)
            ? toPlainObject(value)
            : (isPlainObject(value) ? value : {});
        }
        else {
          isCommon = false;
        }
      }
      // Add the source value to the stack of traversed objects and associate
      // it with its merged value.
      stackA.push(srcValue);
      stackB.push(result);

      if (isCommon) {
        // Recursively merge objects and arrays (susceptible to call stack limits).
        object[key] = mergeFunc(result, srcValue, customizer, stackA, stackB);
      } else if (result === result ? (result !== value) : (value === value)) {
        object[key] = result;
      }
    }

    /**
     * The base implementation of `_.property` without support for deep paths.
     *
     * @private
     * @param {string} key The key of the property to get.
     * @returns {Function} Returns the new function.
     */
    function baseProperty(key) {
      return function(object) {
        return object == null ? undefined : object[key];
      };
    }

    /**
     * A specialized version of `baseProperty` which supports deep paths.
     *
     * @private
     * @param {Array|string} path The path of the property to get.
     * @returns {Function} Returns the new function.
     */
    function basePropertyDeep(path) {
      var pathKey = (path + '');
      path = toPath(path);
      return function(object) {
        return baseGet(object, path, pathKey);
      };
    }

    /**
     * The base implementation of `_.pullAt` without support for individual
     * index arguments and capturing the removed elements.
     *
     * @private
     * @param {Array} array The array to modify.
     * @param {number[]} indexes The indexes of elements to remove.
     * @returns {Array} Returns `array`.
     */
    function basePullAt(array, indexes) {
      var length = array ? indexes.length : 0;
      while (length--) {
        var index = indexes[length];
        if (index != previous && isIndex(index)) {
          var previous = index;
          splice.call(array, index, 1);
        }
      }
      return array;
    }

    /**
     * The base implementation of `_.random` without support for argument juggling
     * and returning floating-point numbers.
     *
     * @private
     * @param {number} min The minimum possible value.
     * @param {number} max The maximum possible value.
     * @returns {number} Returns the random number.
     */
    function baseRandom(min, max) {
      return min + nativeFloor(nativeRandom() * (max - min + 1));
    }

    /**
     * The base implementation of `_.reduce` and `_.reduceRight` without support
     * for callback shorthands and `this` binding, which iterates over `collection`
     * using the provided `eachFunc`.
     *
     * @private
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {*} accumulator The initial value.
     * @param {boolean} initFromCollection Specify using the first or last element
     *  of `collection` as the initial value.
     * @param {Function} eachFunc The function to iterate over `collection`.
     * @returns {*} Returns the accumulated value.
     */
    function baseReduce(collection, iteratee, accumulator, initFromCollection, eachFunc) {
      eachFunc(collection, function(value, index, collection) {
        accumulator = initFromCollection
          ? (initFromCollection = false, value)
          : iteratee(accumulator, value, index, collection);
      });
      return accumulator;
    }

    /**
     * The base implementation of `setData` without support for hot loop detection.
     *
     * @private
     * @param {Function} func The function to associate metadata with.
     * @param {*} data The metadata.
     * @returns {Function} Returns `func`.
     */
    var baseSetData = !metaMap ? identity : function(func, data) {
      metaMap.set(func, data);
      return func;
    };

    /**
     * The base implementation of `_.slice` without an iteratee call guard.
     *
     * @private
     * @param {Array} array The array to slice.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns the slice of `array`.
     */
    function baseSlice(array, start, end) {
      var index = -1,
          length = array.length;

      start = start == null ? 0 : (+start || 0);
      if (start < 0) {
        start = -start > length ? 0 : (length + start);
      }
      end = (end === undefined || end > length) ? length : (+end || 0);
      if (end < 0) {
        end += length;
      }
      length = start > end ? 0 : ((end - start) >>> 0);
      start >>>= 0;

      var result = Array(length);
      while (++index < length) {
        result[index] = array[index + start];
      }
      return result;
    }

    /**
     * The base implementation of `_.some` without support for callback shorthands
     * and `this` binding.
     *
     * @private
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {boolean} Returns `true` if any element passes the predicate check,
     *  else `false`.
     */
    function baseSome(collection, predicate) {
      var result;

      baseEach(collection, function(value, index, collection) {
        result = predicate(value, index, collection);
        return !result;
      });
      return !!result;
    }

    /**
     * The base implementation of `_.sortBy` which uses `comparer` to define
     * the sort order of `array` and replaces criteria objects with their
     * corresponding values.
     *
     * @private
     * @param {Array} array The array to sort.
     * @param {Function} comparer The function to define sort order.
     * @returns {Array} Returns `array`.
     */
    function baseSortBy(array, comparer) {
      var length = array.length;

      array.sort(comparer);
      while (length--) {
        array[length] = array[length].value;
      }
      return array;
    }

    /**
     * The base implementation of `_.sortByOrder` without param guards.
     *
     * @private
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
     * @param {boolean[]} orders The sort orders of `iteratees`.
     * @returns {Array} Returns the new sorted array.
     */
    function baseSortByOrder(collection, iteratees, orders) {
      var callback = getCallback(),
          index = -1;

      iteratees = arrayMap(iteratees, function(iteratee) { return callback(iteratee); });

      var result = baseMap(collection, function(value) {
        var criteria = arrayMap(iteratees, function(iteratee) { return iteratee(value); });
        return { 'criteria': criteria, 'index': ++index, 'value': value };
      });

      return baseSortBy(result, function(object, other) {
        return compareMultiple(object, other, orders);
      });
    }

    /**
     * The base implementation of `_.sum` without support for callback shorthands
     * and `this` binding.
     *
     * @private
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {number} Returns the sum.
     */
    function baseSum(collection, iteratee) {
      var result = 0;
      baseEach(collection, function(value, index, collection) {
        result += +iteratee(value, index, collection) || 0;
      });
      return result;
    }

    /**
     * The base implementation of `_.uniq` without support for callback shorthands
     * and `this` binding.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {Function} [iteratee] The function invoked per iteration.
     * @returns {Array} Returns the new duplicate-value-free array.
     */
    function baseUniq(array, iteratee) {
      var index = -1,
          indexOf = getIndexOf(),
          length = array.length,
          isCommon = indexOf == baseIndexOf,
          isLarge = isCommon && length >= LARGE_ARRAY_SIZE,
          seen = isLarge ? createCache() : null,
          result = [];

      if (seen) {
        indexOf = cacheIndexOf;
        isCommon = false;
      } else {
        isLarge = false;
        seen = iteratee ? [] : result;
      }
      outer:
      while (++index < length) {
        var value = array[index],
            computed = iteratee ? iteratee(value, index, array) : value;

        if (isCommon && value === value) {
          var seenIndex = seen.length;
          while (seenIndex--) {
            if (seen[seenIndex] === computed) {
              continue outer;
            }
          }
          if (iteratee) {
            seen.push(computed);
          }
          result.push(value);
        }
        else if (indexOf(seen, computed, 0) < 0) {
          if (iteratee || isLarge) {
            seen.push(computed);
          }
          result.push(value);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.values` and `_.valuesIn` which creates an
     * array of `object` property values corresponding to the property names
     * of `props`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array} props The property names to get values for.
     * @returns {Object} Returns the array of property values.
     */
    function baseValues(object, props) {
      var index = -1,
          length = props.length,
          result = Array(length);

      while (++index < length) {
        result[index] = object[props[index]];
      }
      return result;
    }

    /**
     * The base implementation of `_.dropRightWhile`, `_.dropWhile`, `_.takeRightWhile`,
     * and `_.takeWhile` without support for callback shorthands and `this` binding.
     *
     * @private
     * @param {Array} array The array to query.
     * @param {Function} predicate The function invoked per iteration.
     * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Array} Returns the slice of `array`.
     */
    function baseWhile(array, predicate, isDrop, fromRight) {
      var length = array.length,
          index = fromRight ? length : -1;

      while ((fromRight ? index-- : ++index < length) && predicate(array[index], index, array)) {}
      return isDrop
        ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
        : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
    }

    /**
     * The base implementation of `wrapperValue` which returns the result of
     * performing a sequence of actions on the unwrapped `value`, where each
     * successive action is supplied the return value of the previous.
     *
     * @private
     * @param {*} value The unwrapped value.
     * @param {Array} actions Actions to peform to resolve the unwrapped value.
     * @returns {*} Returns the resolved value.
     */
    function baseWrapperValue(value, actions) {
      var result = value;
      if (result instanceof LazyWrapper) {
        result = result.value();
      }
      var index = -1,
          length = actions.length;

      while (++index < length) {
        var action = actions[index];
        result = action.func.apply(action.thisArg, arrayPush([result], action.args));
      }
      return result;
    }

    /**
     * Performs a binary search of `array` to determine the index at which `value`
     * should be inserted into `array` in order to maintain its sort order.
     *
     * @private
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {boolean} [retHighest] Specify returning the highest qualified index.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     */
    function binaryIndex(array, value, retHighest) {
      var low = 0,
          high = array ? array.length : low;

      if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
        while (low < high) {
          var mid = (low + high) >>> 1,
              computed = array[mid];

          if ((retHighest ? (computed <= value) : (computed < value)) && computed !== null) {
            low = mid + 1;
          } else {
            high = mid;
          }
        }
        return high;
      }
      return binaryIndexBy(array, value, identity, retHighest);
    }

    /**
     * This function is like `binaryIndex` except that it invokes `iteratee` for
     * `value` and each element of `array` to compute their sort ranking. The
     * iteratee is invoked with one argument; (value).
     *
     * @private
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {boolean} [retHighest] Specify returning the highest qualified index.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     */
    function binaryIndexBy(array, value, iteratee, retHighest) {
      value = iteratee(value);

      var low = 0,
          high = array ? array.length : 0,
          valIsNaN = value !== value,
          valIsNull = value === null,
          valIsUndef = value === undefined;

      while (low < high) {
        var mid = nativeFloor((low + high) / 2),
            computed = iteratee(array[mid]),
            isDef = computed !== undefined,
            isReflexive = computed === computed;

        if (valIsNaN) {
          var setLow = isReflexive || retHighest;
        } else if (valIsNull) {
          setLow = isReflexive && isDef && (retHighest || computed != null);
        } else if (valIsUndef) {
          setLow = isReflexive && (retHighest || isDef);
        } else if (computed == null) {
          setLow = false;
        } else {
          setLow = retHighest ? (computed <= value) : (computed < value);
        }
        if (setLow) {
          low = mid + 1;
        } else {
          high = mid;
        }
      }
      return nativeMin(high, MAX_ARRAY_INDEX);
    }

    /**
     * A specialized version of `baseCallback` which only supports `this` binding
     * and specifying the number of arguments to provide to `func`.
     *
     * @private
     * @param {Function} func The function to bind.
     * @param {*} thisArg The `this` binding of `func`.
     * @param {number} [argCount] The number of arguments to provide to `func`.
     * @returns {Function} Returns the callback.
     */
    function bindCallback(func, thisArg, argCount) {
      if (typeof func != 'function') {
        return identity;
      }
      if (thisArg === undefined) {
        return func;
      }
      switch (argCount) {
        case 1: return function(value) {
          return func.call(thisArg, value);
        };
        case 3: return function(value, index, collection) {
          return func.call(thisArg, value, index, collection);
        };
        case 4: return function(accumulator, value, index, collection) {
          return func.call(thisArg, accumulator, value, index, collection);
        };
        case 5: return function(value, other, key, object, source) {
          return func.call(thisArg, value, other, key, object, source);
        };
      }
      return function() {
        return func.apply(thisArg, arguments);
      };
    }

    /**
     * Creates a clone of the given array buffer.
     *
     * @private
     * @param {ArrayBuffer} buffer The array buffer to clone.
     * @returns {ArrayBuffer} Returns the cloned array buffer.
     */
    function bufferClone(buffer) {
      var result = new ArrayBuffer(buffer.byteLength),
          view = new Uint8Array(result);

      view.set(new Uint8Array(buffer));
      return result;
    }

    /**
     * Creates an array that is the composition of partially applied arguments,
     * placeholders, and provided arguments into a single array of arguments.
     *
     * @private
     * @param {Array|Object} args The provided arguments.
     * @param {Array} partials The arguments to prepend to those provided.
     * @param {Array} holders The `partials` placeholder indexes.
     * @returns {Array} Returns the new array of composed arguments.
     */
    function composeArgs(args, partials, holders) {
      var holdersLength = holders.length,
          argsIndex = -1,
          argsLength = nativeMax(args.length - holdersLength, 0),
          leftIndex = -1,
          leftLength = partials.length,
          result = Array(leftLength + argsLength);

      while (++leftIndex < leftLength) {
        result[leftIndex] = partials[leftIndex];
      }
      while (++argsIndex < holdersLength) {
        result[holders[argsIndex]] = args[argsIndex];
      }
      while (argsLength--) {
        result[leftIndex++] = args[argsIndex++];
      }
      return result;
    }

    /**
     * This function is like `composeArgs` except that the arguments composition
     * is tailored for `_.partialRight`.
     *
     * @private
     * @param {Array|Object} args The provided arguments.
     * @param {Array} partials The arguments to append to those provided.
     * @param {Array} holders The `partials` placeholder indexes.
     * @returns {Array} Returns the new array of composed arguments.
     */
    function composeArgsRight(args, partials, holders) {
      var holdersIndex = -1,
          holdersLength = holders.length,
          argsIndex = -1,
          argsLength = nativeMax(args.length - holdersLength, 0),
          rightIndex = -1,
          rightLength = partials.length,
          result = Array(argsLength + rightLength);

      while (++argsIndex < argsLength) {
        result[argsIndex] = args[argsIndex];
      }
      var offset = argsIndex;
      while (++rightIndex < rightLength) {
        result[offset + rightIndex] = partials[rightIndex];
      }
      while (++holdersIndex < holdersLength) {
        result[offset + holders[holdersIndex]] = args[argsIndex++];
      }
      return result;
    }

    /**
     * Creates a `_.countBy`, `_.groupBy`, `_.indexBy`, or `_.partition` function.
     *
     * @private
     * @param {Function} setter The function to set keys and values of the accumulator object.
     * @param {Function} [initializer] The function to initialize the accumulator object.
     * @returns {Function} Returns the new aggregator function.
     */
    function createAggregator(setter, initializer) {
      return function(collection, iteratee, thisArg) {
        var result = initializer ? initializer() : {};
        iteratee = getCallback(iteratee, thisArg, 3);

        if (isArray(collection)) {
          var index = -1,
              length = collection.length;

          while (++index < length) {
            var value = collection[index];
            setter(result, value, iteratee(value, index, collection), collection);
          }
        } else {
          baseEach(collection, function(value, key, collection) {
            setter(result, value, iteratee(value, key, collection), collection);
          });
        }
        return result;
      };
    }

    /**
     * Creates a `_.assign`, `_.defaults`, or `_.merge` function.
     *
     * @private
     * @param {Function} assigner The function to assign values.
     * @returns {Function} Returns the new assigner function.
     */
    function createAssigner(assigner) {
      return restParam(function(object, sources) {
        var index = -1,
            length = object == null ? 0 : sources.length,
            customizer = length > 2 ? sources[length - 2] : undefined,
            guard = length > 2 ? sources[2] : undefined,
            thisArg = length > 1 ? sources[length - 1] : undefined;

        if (typeof customizer == 'function') {
          customizer = bindCallback(customizer, thisArg, 5);
          length -= 2;
        } else {
          customizer = typeof thisArg == 'function' ? thisArg : undefined;
          length -= (customizer ? 1 : 0);
        }
        if (guard && isIterateeCall(sources[0], sources[1], guard)) {
          customizer = length < 3 ? undefined : customizer;
          length = 1;
        }
        while (++index < length) {
          var source = sources[index];
          if (source) {
            assigner(object, source, customizer);
          }
        }
        return object;
      });
    }

    /**
     * Creates a `baseEach` or `baseEachRight` function.
     *
     * @private
     * @param {Function} eachFunc The function to iterate over a collection.
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new base function.
     */
    function createBaseEach(eachFunc, fromRight) {
      return function(collection, iteratee) {
        var length = collection ? getLength(collection) : 0;
        if (!isLength(length)) {
          return eachFunc(collection, iteratee);
        }
        var index = fromRight ? length : -1,
            iterable = toObject(collection);

        while ((fromRight ? index-- : ++index < length)) {
          if (iteratee(iterable[index], index, iterable) === false) {
            break;
          }
        }
        return collection;
      };
    }

    /**
     * Creates a base function for `_.forIn` or `_.forInRight`.
     *
     * @private
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new base function.
     */
    function createBaseFor(fromRight) {
      return function(object, iteratee, keysFunc) {
        var iterable = toObject(object),
            props = keysFunc(object),
            length = props.length,
            index = fromRight ? length : -1;

        while ((fromRight ? index-- : ++index < length)) {
          var key = props[index];
          if (iteratee(iterable[key], key, iterable) === false) {
            break;
          }
        }
        return object;
      };
    }

    /**
     * Creates a function that wraps `func` and invokes it with the `this`
     * binding of `thisArg`.
     *
     * @private
     * @param {Function} func The function to bind.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @returns {Function} Returns the new bound function.
     */
    function createBindWrapper(func, thisArg) {
      var Ctor = createCtorWrapper(func);

      function wrapper() {
        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
        return fn.apply(thisArg, arguments);
      }
      return wrapper;
    }

    /**
     * Creates a `Set` cache object to optimize linear searches of large arrays.
     *
     * @private
     * @param {Array} [values] The values to cache.
     * @returns {null|Object} Returns the new cache object if `Set` is supported, else `null`.
     */
    function createCache(values) {
      return (nativeCreate && Set) ? new SetCache(values) : null;
    }

    /**
     * Creates a function that produces compound words out of the words in a
     * given string.
     *
     * @private
     * @param {Function} callback The function to combine each word.
     * @returns {Function} Returns the new compounder function.
     */
    function createCompounder(callback) {
      return function(string) {
        var index = -1,
            array = words(deburr(string)),
            length = array.length,
            result = '';

        while (++index < length) {
          result = callback(result, array[index], index);
        }
        return result;
      };
    }

    /**
     * Creates a function that produces an instance of `Ctor` regardless of
     * whether it was invoked as part of a `new` expression or by `call` or `apply`.
     *
     * @private
     * @param {Function} Ctor The constructor to wrap.
     * @returns {Function} Returns the new wrapped function.
     */
    function createCtorWrapper(Ctor) {
      return function() {
        // Use a `switch` statement to work with class constructors.
        // See http://ecma-international.org/ecma-262/6.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
        // for more details.
        var args = arguments;
        switch (args.length) {
          case 0: return new Ctor;
          case 1: return new Ctor(args[0]);
          case 2: return new Ctor(args[0], args[1]);
          case 3: return new Ctor(args[0], args[1], args[2]);
          case 4: return new Ctor(args[0], args[1], args[2], args[3]);
          case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
          case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
          case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
        }
        var thisBinding = baseCreate(Ctor.prototype),
            result = Ctor.apply(thisBinding, args);

        // Mimic the constructor's `return` behavior.
        // See https://es5.github.io/#x13.2.2 for more details.
        return isObject(result) ? result : thisBinding;
      };
    }

    /**
     * Creates a `_.curry` or `_.curryRight` function.
     *
     * @private
     * @param {boolean} flag The curry bit flag.
     * @returns {Function} Returns the new curry function.
     */
    function createCurry(flag) {
      function curryFunc(func, arity, guard) {
        if (guard && isIterateeCall(func, arity, guard)) {
          arity = undefined;
        }
        var result = createWrapper(func, flag, undefined, undefined, undefined, undefined, undefined, arity);
        result.placeholder = curryFunc.placeholder;
        return result;
      }
      return curryFunc;
    }

    /**
     * Creates a `_.defaults` or `_.defaultsDeep` function.
     *
     * @private
     * @param {Function} assigner The function to assign values.
     * @param {Function} customizer The function to customize assigned values.
     * @returns {Function} Returns the new defaults function.
     */
    function createDefaults(assigner, customizer) {
      return restParam(function(args) {
        var object = args[0];
        if (object == null) {
          return object;
        }
        args.push(customizer);
        return assigner.apply(undefined, args);
      });
    }

    /**
     * Creates a `_.max` or `_.min` function.
     *
     * @private
     * @param {Function} comparator The function used to compare values.
     * @param {*} exValue The initial extremum value.
     * @returns {Function} Returns the new extremum function.
     */
    function createExtremum(comparator, exValue) {
      return function(collection, iteratee, thisArg) {
        if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
          iteratee = undefined;
        }
        iteratee = getCallback(iteratee, thisArg, 3);
        if (iteratee.length == 1) {
          collection = isArray(collection) ? collection : toIterable(collection);
          var result = arrayExtremum(collection, iteratee, comparator, exValue);
          if (!(collection.length && result === exValue)) {
            return result;
          }
        }
        return baseExtremum(collection, iteratee, comparator, exValue);
      };
    }

    /**
     * Creates a `_.find` or `_.findLast` function.
     *
     * @private
     * @param {Function} eachFunc The function to iterate over a collection.
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new find function.
     */
    function createFind(eachFunc, fromRight) {
      return function(collection, predicate, thisArg) {
        predicate = getCallback(predicate, thisArg, 3);
        if (isArray(collection)) {
          var index = baseFindIndex(collection, predicate, fromRight);
          return index > -1 ? collection[index] : undefined;
        }
        return baseFind(collection, predicate, eachFunc);
      };
    }

    /**
     * Creates a `_.findIndex` or `_.findLastIndex` function.
     *
     * @private
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new find function.
     */
    function createFindIndex(fromRight) {
      return function(array, predicate, thisArg) {
        if (!(array && array.length)) {
          return -1;
        }
        predicate = getCallback(predicate, thisArg, 3);
        return baseFindIndex(array, predicate, fromRight);
      };
    }

    /**
     * Creates a `_.findKey` or `_.findLastKey` function.
     *
     * @private
     * @param {Function} objectFunc The function to iterate over an object.
     * @returns {Function} Returns the new find function.
     */
    function createFindKey(objectFunc) {
      return function(object, predicate, thisArg) {
        predicate = getCallback(predicate, thisArg, 3);
        return baseFind(object, predicate, objectFunc, true);
      };
    }

    /**
     * Creates a `_.flow` or `_.flowRight` function.
     *
     * @private
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new flow function.
     */
    function createFlow(fromRight) {
      return function() {
        var wrapper,
            length = arguments.length,
            index = fromRight ? length : -1,
            leftIndex = 0,
            funcs = Array(length);

        while ((fromRight ? index-- : ++index < length)) {
          var func = funcs[leftIndex++] = arguments[index];
          if (typeof func != 'function') {
            throw new TypeError(FUNC_ERROR_TEXT);
          }
          if (!wrapper && LodashWrapper.prototype.thru && getFuncName(func) == 'wrapper') {
            wrapper = new LodashWrapper([], true);
          }
        }
        index = wrapper ? -1 : length;
        while (++index < length) {
          func = funcs[index];

          var funcName = getFuncName(func),
              data = funcName == 'wrapper' ? getData(func) : undefined;

          if (data && isLaziable(data[0]) && data[1] == (ARY_FLAG | CURRY_FLAG | PARTIAL_FLAG | REARG_FLAG) && !data[4].length && data[9] == 1) {
            wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
          } else {
            wrapper = (func.length == 1 && isLaziable(func)) ? wrapper[funcName]() : wrapper.thru(func);
          }
        }
        return function() {
          var args = arguments,
              value = args[0];

          if (wrapper && args.length == 1 && isArray(value) && value.length >= LARGE_ARRAY_SIZE) {
            return wrapper.plant(value).value();
          }
          var index = 0,
              result = length ? funcs[index].apply(this, args) : value;

          while (++index < length) {
            result = funcs[index].call(this, result);
          }
          return result;
        };
      };
    }

    /**
     * Creates a function for `_.forEach` or `_.forEachRight`.
     *
     * @private
     * @param {Function} arrayFunc The function to iterate over an array.
     * @param {Function} eachFunc The function to iterate over a collection.
     * @returns {Function} Returns the new each function.
     */
    function createForEach(arrayFunc, eachFunc) {
      return function(collection, iteratee, thisArg) {
        return (typeof iteratee == 'function' && thisArg === undefined && isArray(collection))
          ? arrayFunc(collection, iteratee)
          : eachFunc(collection, bindCallback(iteratee, thisArg, 3));
      };
    }

    /**
     * Creates a function for `_.forIn` or `_.forInRight`.
     *
     * @private
     * @param {Function} objectFunc The function to iterate over an object.
     * @returns {Function} Returns the new each function.
     */
    function createForIn(objectFunc) {
      return function(object, iteratee, thisArg) {
        if (typeof iteratee != 'function' || thisArg !== undefined) {
          iteratee = bindCallback(iteratee, thisArg, 3);
        }
        return objectFunc(object, iteratee, keysIn);
      };
    }

    /**
     * Creates a function for `_.forOwn` or `_.forOwnRight`.
     *
     * @private
     * @param {Function} objectFunc The function to iterate over an object.
     * @returns {Function} Returns the new each function.
     */
    function createForOwn(objectFunc) {
      return function(object, iteratee, thisArg) {
        if (typeof iteratee != 'function' || thisArg !== undefined) {
          iteratee = bindCallback(iteratee, thisArg, 3);
        }
        return objectFunc(object, iteratee);
      };
    }

    /**
     * Creates a function for `_.mapKeys` or `_.mapValues`.
     *
     * @private
     * @param {boolean} [isMapKeys] Specify mapping keys instead of values.
     * @returns {Function} Returns the new map function.
     */
    function createObjectMapper(isMapKeys) {
      return function(object, iteratee, thisArg) {
        var result = {};
        iteratee = getCallback(iteratee, thisArg, 3);

        baseForOwn(object, function(value, key, object) {
          var mapped = iteratee(value, key, object);
          key = isMapKeys ? mapped : key;
          value = isMapKeys ? value : mapped;
          result[key] = value;
        });
        return result;
      };
    }

    /**
     * Creates a function for `_.padLeft` or `_.padRight`.
     *
     * @private
     * @param {boolean} [fromRight] Specify padding from the right.
     * @returns {Function} Returns the new pad function.
     */
    function createPadDir(fromRight) {
      return function(string, length, chars) {
        string = baseToString(string);
        return (fromRight ? string : '') + createPadding(string, length, chars) + (fromRight ? '' : string);
      };
    }

    /**
     * Creates a `_.partial` or `_.partialRight` function.
     *
     * @private
     * @param {boolean} flag The partial bit flag.
     * @returns {Function} Returns the new partial function.
     */
    function createPartial(flag) {
      var partialFunc = restParam(function(func, partials) {
        var holders = replaceHolders(partials, partialFunc.placeholder);
        return createWrapper(func, flag, undefined, partials, holders);
      });
      return partialFunc;
    }

    /**
     * Creates a function for `_.reduce` or `_.reduceRight`.
     *
     * @private
     * @param {Function} arrayFunc The function to iterate over an array.
     * @param {Function} eachFunc The function to iterate over a collection.
     * @returns {Function} Returns the new each function.
     */
    function createReduce(arrayFunc, eachFunc) {
      return function(collection, iteratee, accumulator, thisArg) {
        var initFromArray = arguments.length < 3;
        return (typeof iteratee == 'function' && thisArg === undefined && isArray(collection))
          ? arrayFunc(collection, iteratee, accumulator, initFromArray)
          : baseReduce(collection, getCallback(iteratee, thisArg, 4), accumulator, initFromArray, eachFunc);
      };
    }

    /**
     * Creates a function that wraps `func` and invokes it with optional `this`
     * binding of, partial application, and currying.
     *
     * @private
     * @param {Function|string} func The function or method name to reference.
     * @param {number} bitmask The bitmask of flags. See `createWrapper` for more details.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {Array} [partials] The arguments to prepend to those provided to the new function.
     * @param {Array} [holders] The `partials` placeholder indexes.
     * @param {Array} [partialsRight] The arguments to append to those provided to the new function.
     * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
     * @param {Array} [argPos] The argument positions of the new function.
     * @param {number} [ary] The arity cap of `func`.
     * @param {number} [arity] The arity of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createHybridWrapper(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
      var isAry = bitmask & ARY_FLAG,
          isBind = bitmask & BIND_FLAG,
          isBindKey = bitmask & BIND_KEY_FLAG,
          isCurry = bitmask & CURRY_FLAG,
          isCurryBound = bitmask & CURRY_BOUND_FLAG,
          isCurryRight = bitmask & CURRY_RIGHT_FLAG,
          Ctor = isBindKey ? undefined : createCtorWrapper(func);

      function wrapper() {
        // Avoid `arguments` object use disqualifying optimizations by
        // converting it to an array before providing it to other functions.
        var length = arguments.length,
            index = length,
            args = Array(length);

        while (index--) {
          args[index] = arguments[index];
        }
        if (partials) {
          args = composeArgs(args, partials, holders);
        }
        if (partialsRight) {
          args = composeArgsRight(args, partialsRight, holdersRight);
        }
        if (isCurry || isCurryRight) {
          var placeholder = wrapper.placeholder,
              argsHolders = replaceHolders(args, placeholder);

          length -= argsHolders.length;
          if (length < arity) {
            var newArgPos = argPos ? arrayCopy(argPos) : undefined,
                newArity = nativeMax(arity - length, 0),
                newsHolders = isCurry ? argsHolders : undefined,
                newHoldersRight = isCurry ? undefined : argsHolders,
                newPartials = isCurry ? args : undefined,
                newPartialsRight = isCurry ? undefined : args;

            bitmask |= (isCurry ? PARTIAL_FLAG : PARTIAL_RIGHT_FLAG);
            bitmask &= ~(isCurry ? PARTIAL_RIGHT_FLAG : PARTIAL_FLAG);

            if (!isCurryBound) {
              bitmask &= ~(BIND_FLAG | BIND_KEY_FLAG);
            }
            var newData = [func, bitmask, thisArg, newPartials, newsHolders, newPartialsRight, newHoldersRight, newArgPos, ary, newArity],
                result = createHybridWrapper.apply(undefined, newData);

            if (isLaziable(func)) {
              setData(result, newData);
            }
            result.placeholder = placeholder;
            return result;
          }
        }
        var thisBinding = isBind ? thisArg : this,
            fn = isBindKey ? thisBinding[func] : func;

        if (argPos) {
          args = reorder(args, argPos);
        }
        if (isAry && ary < args.length) {
          args.length = ary;
        }
        if (this && this !== root && this instanceof wrapper) {
          fn = Ctor || createCtorWrapper(func);
        }
        return fn.apply(thisBinding, args);
      }
      return wrapper;
    }

    /**
     * Creates the padding required for `string` based on the given `length`.
     * The `chars` string is truncated if the number of characters exceeds `length`.
     *
     * @private
     * @param {string} string The string to create padding for.
     * @param {number} [length=0] The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the pad for `string`.
     */
    function createPadding(string, length, chars) {
      var strLength = string.length;
      length = +length;

      if (strLength >= length || !nativeIsFinite(length)) {
        return '';
      }
      var padLength = length - strLength;
      chars = chars == null ? ' ' : (chars + '');
      return repeat(chars, nativeCeil(padLength / chars.length)).slice(0, padLength);
    }

    /**
     * Creates a function that wraps `func` and invokes it with the optional `this`
     * binding of `thisArg` and the `partials` prepended to those provided to
     * the wrapper.
     *
     * @private
     * @param {Function} func The function to partially apply arguments to.
     * @param {number} bitmask The bitmask of flags. See `createWrapper` for more details.
     * @param {*} thisArg The `this` binding of `func`.
     * @param {Array} partials The arguments to prepend to those provided to the new function.
     * @returns {Function} Returns the new bound function.
     */
    function createPartialWrapper(func, bitmask, thisArg, partials) {
      var isBind = bitmask & BIND_FLAG,
          Ctor = createCtorWrapper(func);

      function wrapper() {
        // Avoid `arguments` object use disqualifying optimizations by
        // converting it to an array before providing it `func`.
        var argsIndex = -1,
            argsLength = arguments.length,
            leftIndex = -1,
            leftLength = partials.length,
            args = Array(leftLength + argsLength);

        while (++leftIndex < leftLength) {
          args[leftIndex] = partials[leftIndex];
        }
        while (argsLength--) {
          args[leftIndex++] = arguments[++argsIndex];
        }
        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
        return fn.apply(isBind ? thisArg : this, args);
      }
      return wrapper;
    }

    /**
     * Creates a `_.ceil`, `_.floor`, or `_.round` function.
     *
     * @private
     * @param {string} methodName The name of the `Math` method to use when rounding.
     * @returns {Function} Returns the new round function.
     */
    function createRound(methodName) {
      var func = Math[methodName];
      return function(number, precision) {
        precision = precision === undefined ? 0 : (+precision || 0);
        if (precision) {
          precision = pow(10, precision);
          return func(number * precision) / precision;
        }
        return func(number);
      };
    }

    /**
     * Creates a `_.sortedIndex` or `_.sortedLastIndex` function.
     *
     * @private
     * @param {boolean} [retHighest] Specify returning the highest qualified index.
     * @returns {Function} Returns the new index function.
     */
    function createSortedIndex(retHighest) {
      return function(array, value, iteratee, thisArg) {
        var callback = getCallback(iteratee);
        return (iteratee == null && callback === baseCallback)
          ? binaryIndex(array, value, retHighest)
          : binaryIndexBy(array, value, callback(iteratee, thisArg, 1), retHighest);
      };
    }

    /**
     * Creates a function that either curries or invokes `func` with optional
     * `this` binding and partially applied arguments.
     *
     * @private
     * @param {Function|string} func The function or method name to reference.
     * @param {number} bitmask The bitmask of flags.
     *  The bitmask may be composed of the following flags:
     *     1 - `_.bind`
     *     2 - `_.bindKey`
     *     4 - `_.curry` or `_.curryRight` of a bound function
     *     8 - `_.curry`
     *    16 - `_.curryRight`
     *    32 - `_.partial`
     *    64 - `_.partialRight`
     *   128 - `_.rearg`
     *   256 - `_.ary`
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {Array} [partials] The arguments to be partially applied.
     * @param {Array} [holders] The `partials` placeholder indexes.
     * @param {Array} [argPos] The argument positions of the new function.
     * @param {number} [ary] The arity cap of `func`.
     * @param {number} [arity] The arity of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createWrapper(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
      var isBindKey = bitmask & BIND_KEY_FLAG;
      if (!isBindKey && typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      var length = partials ? partials.length : 0;
      if (!length) {
        bitmask &= ~(PARTIAL_FLAG | PARTIAL_RIGHT_FLAG);
        partials = holders = undefined;
      }
      length -= (holders ? holders.length : 0);
      if (bitmask & PARTIAL_RIGHT_FLAG) {
        var partialsRight = partials,
            holdersRight = holders;

        partials = holders = undefined;
      }
      var data = isBindKey ? undefined : getData(func),
          newData = [func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity];

      if (data) {
        mergeData(newData, data);
        bitmask = newData[1];
        arity = newData[9];
      }
      newData[9] = arity == null
        ? (isBindKey ? 0 : func.length)
        : (nativeMax(arity - length, 0) || 0);

      if (bitmask == BIND_FLAG) {
        var result = createBindWrapper(newData[0], newData[2]);
      } else if ((bitmask == PARTIAL_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) && !newData[4].length) {
        result = createPartialWrapper.apply(undefined, newData);
      } else {
        result = createHybridWrapper.apply(undefined, newData);
      }
      var setter = data ? baseSetData : setData;
      return setter(result, newData);
    }

    /**
     * A specialized version of `baseIsEqualDeep` for arrays with support for
     * partial deep comparisons.
     *
     * @private
     * @param {Array} array The array to compare.
     * @param {Array} other The other array to compare.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Function} [customizer] The function to customize comparing arrays.
     * @param {boolean} [isLoose] Specify performing partial comparisons.
     * @param {Array} [stackA] Tracks traversed `value` objects.
     * @param {Array} [stackB] Tracks traversed `other` objects.
     * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
     */
    function equalArrays(array, other, equalFunc, customizer, isLoose, stackA, stackB) {
      var index = -1,
          arrLength = array.length,
          othLength = other.length;

      if (arrLength != othLength && !(isLoose && othLength > arrLength)) {
        return false;
      }
      // Ignore non-index properties.
      while (++index < arrLength) {
        var arrValue = array[index],
            othValue = other[index],
            result = customizer ? customizer(isLoose ? othValue : arrValue, isLoose ? arrValue : othValue, index) : undefined;

        if (result !== undefined) {
          if (result) {
            continue;
          }
          return false;
        }
        // Recursively compare arrays (susceptible to call stack limits).
        if (isLoose) {
          if (!arraySome(other, function(othValue) {
                return arrValue === othValue || equalFunc(arrValue, othValue, customizer, isLoose, stackA, stackB);
              })) {
            return false;
          }
        } else if (!(arrValue === othValue || equalFunc(arrValue, othValue, customizer, isLoose, stackA, stackB))) {
          return false;
        }
      }
      return true;
    }

    /**
     * A specialized version of `baseIsEqualDeep` for comparing objects of
     * the same `toStringTag`.
     *
     * **Note:** This function only supports comparing values with tags of
     * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {string} tag The `toStringTag` of the objects to compare.
     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
     */
    function equalByTag(object, other, tag) {
      switch (tag) {
        case boolTag:
        case dateTag:
          // Coerce dates and booleans to numbers, dates to milliseconds and booleans
          // to `1` or `0` treating invalid dates coerced to `NaN` as not equal.
          return +object == +other;

        case errorTag:
          return object.name == other.name && object.message == other.message;

        case numberTag:
          // Treat `NaN` vs. `NaN` as equal.
          return (object != +object)
            ? other != +other
            : object == +other;

        case regexpTag:
        case stringTag:
          // Coerce regexes to strings and treat strings primitives and string
          // objects as equal. See https://es5.github.io/#x15.10.6.4 for more details.
          return object == (other + '');
      }
      return false;
    }

    /**
     * A specialized version of `baseIsEqualDeep` for objects with support for
     * partial deep comparisons.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Function} [customizer] The function to customize comparing values.
     * @param {boolean} [isLoose] Specify performing partial comparisons.
     * @param {Array} [stackA] Tracks traversed `value` objects.
     * @param {Array} [stackB] Tracks traversed `other` objects.
     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
     */
    function equalObjects(object, other, equalFunc, customizer, isLoose, stackA, stackB) {
      var objProps = keys(object),
          objLength = objProps.length,
          othProps = keys(other),
          othLength = othProps.length;

      if (objLength != othLength && !isLoose) {
        return false;
      }
      var index = objLength;
      while (index--) {
        var key = objProps[index];
        if (!(isLoose ? key in other : hasOwnProperty.call(other, key))) {
          return false;
        }
      }
      var skipCtor = isLoose;
      while (++index < objLength) {
        key = objProps[index];
        var objValue = object[key],
            othValue = other[key],
            result = customizer ? customizer(isLoose ? othValue : objValue, isLoose? objValue : othValue, key) : undefined;

        // Recursively compare objects (susceptible to call stack limits).
        if (!(result === undefined ? equalFunc(objValue, othValue, customizer, isLoose, stackA, stackB) : result)) {
          return false;
        }
        skipCtor || (skipCtor = key == 'constructor');
      }
      if (!skipCtor) {
        var objCtor = object.constructor,
            othCtor = other.constructor;

        // Non `Object` object instances with different constructors are not equal.
        if (objCtor != othCtor &&
            ('constructor' in object && 'constructor' in other) &&
            !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
              typeof othCtor == 'function' && othCtor instanceof othCtor)) {
          return false;
        }
      }
      return true;
    }

    /**
     * Gets the appropriate "callback" function. If the `_.callback` method is
     * customized this function returns the custom method, otherwise it returns
     * the `baseCallback` function. If arguments are provided the chosen function
     * is invoked with them and its result is returned.
     *
     * @private
     * @returns {Function} Returns the chosen function or its result.
     */
    function getCallback(func, thisArg, argCount) {
      var result = lodash.callback || callback;
      result = result === callback ? baseCallback : result;
      return argCount ? result(func, thisArg, argCount) : result;
    }

    /**
     * Gets metadata for `func`.
     *
     * @private
     * @param {Function} func The function to query.
     * @returns {*} Returns the metadata for `func`.
     */
    var getData = !metaMap ? noop : function(func) {
      return metaMap.get(func);
    };

    /**
     * Gets the name of `func`.
     *
     * @private
     * @param {Function} func The function to query.
     * @returns {string} Returns the function name.
     */
    function getFuncName(func) {
      var result = func.name,
          array = realNames[result],
          length = array ? array.length : 0;

      while (length--) {
        var data = array[length],
            otherFunc = data.func;
        if (otherFunc == null || otherFunc == func) {
          return data.name;
        }
      }
      return result;
    }

    /**
     * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
     * customized this function returns the custom method, otherwise it returns
     * the `baseIndexOf` function. If arguments are provided the chosen function
     * is invoked with them and its result is returned.
     *
     * @private
     * @returns {Function|number} Returns the chosen function or its result.
     */
    function getIndexOf(collection, target, fromIndex) {
      var result = lodash.indexOf || indexOf;
      result = result === indexOf ? baseIndexOf : result;
      return collection ? result(collection, target, fromIndex) : result;
    }

    /**
     * Gets the "length" property value of `object`.
     *
     * **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792)
     * that affects Safari on at least iOS 8.1-8.3 ARM64.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {*} Returns the "length" value.
     */
    var getLength = baseProperty('length');

    /**
     * Gets the propery names, values, and compare flags of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the match data of `object`.
     */
    function getMatchData(object) {
      var result = pairs(object),
          length = result.length;

      while (length--) {
        result[length][2] = isStrictComparable(result[length][1]);
      }
      return result;
    }

    /**
     * Gets the native function at `key` of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {string} key The key of the method to get.
     * @returns {*} Returns the function if it's native, else `undefined`.
     */
    function getNative(object, key) {
      var value = object == null ? undefined : object[key];
      return isNative(value) ? value : undefined;
    }

    /**
     * Gets the view, applying any `transforms` to the `start` and `end` positions.
     *
     * @private
     * @param {number} start The start of the view.
     * @param {number} end The end of the view.
     * @param {Array} transforms The transformations to apply to the view.
     * @returns {Object} Returns an object containing the `start` and `end`
     *  positions of the view.
     */
    function getView(start, end, transforms) {
      var index = -1,
          length = transforms.length;

      while (++index < length) {
        var data = transforms[index],
            size = data.size;

        switch (data.type) {
          case 'drop':      start += size; break;
          case 'dropRight': end -= size; break;
          case 'take':      end = nativeMin(end, start + size); break;
          case 'takeRight': start = nativeMax(start, end - size); break;
        }
      }
      return { 'start': start, 'end': end };
    }

    /**
     * Initializes an array clone.
     *
     * @private
     * @param {Array} array The array to clone.
     * @returns {Array} Returns the initialized clone.
     */
    function initCloneArray(array) {
      var length = array.length,
          result = new array.constructor(length);

      // Add array properties assigned by `RegExp#exec`.
      if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
        result.index = array.index;
        result.input = array.input;
      }
      return result;
    }

    /**
     * Initializes an object clone.
     *
     * @private
     * @param {Object} object The object to clone.
     * @returns {Object} Returns the initialized clone.
     */
    function initCloneObject(object) {
      var Ctor = object.constructor;
      if (!(typeof Ctor == 'function' && Ctor instanceof Ctor)) {
        Ctor = Object;
      }
      return new Ctor;
    }

    /**
     * Initializes an object clone based on its `toStringTag`.
     *
     * **Note:** This function only supports cloning values with tags of
     * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
     *
     * @private
     * @param {Object} object The object to clone.
     * @param {string} tag The `toStringTag` of the object to clone.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Object} Returns the initialized clone.
     */
    function initCloneByTag(object, tag, isDeep) {
      var Ctor = object.constructor;
      switch (tag) {
        case arrayBufferTag:
          return bufferClone(object);

        case boolTag:
        case dateTag:
          return new Ctor(+object);

        case float32Tag: case float64Tag:
        case int8Tag: case int16Tag: case int32Tag:
        case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
          var buffer = object.buffer;
          return new Ctor(isDeep ? bufferClone(buffer) : buffer, object.byteOffset, object.length);

        case numberTag:
        case stringTag:
          return new Ctor(object);

        case regexpTag:
          var result = new Ctor(object.source, reFlags.exec(object));
          result.lastIndex = object.lastIndex;
      }
      return result;
    }

    /**
     * Invokes the method at `path` on `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the method to invoke.
     * @param {Array} args The arguments to invoke the method with.
     * @returns {*} Returns the result of the invoked method.
     */
    function invokePath(object, path, args) {
      if (object != null && !isKey(path, object)) {
        path = toPath(path);
        object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
        path = last(path);
      }
      var func = object == null ? object : object[path];
      return func == null ? undefined : func.apply(object, args);
    }

    /**
     * Checks if `value` is array-like.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
     */
    function isArrayLike(value) {
      return value != null && isLength(getLength(value));
    }

    /**
     * Checks if `value` is a valid array-like index.
     *
     * @private
     * @param {*} value The value to check.
     * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
     * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
     */
    function isIndex(value, length) {
      value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
      length = length == null ? MAX_SAFE_INTEGER : length;
      return value > -1 && value % 1 == 0 && value < length;
    }

    /**
     * Checks if the provided arguments are from an iteratee call.
     *
     * @private
     * @param {*} value The potential iteratee value argument.
     * @param {*} index The potential iteratee index or key argument.
     * @param {*} object The potential iteratee object argument.
     * @returns {boolean} Returns `true` if the arguments are from an iteratee call, else `false`.
     */
    function isIterateeCall(value, index, object) {
      if (!isObject(object)) {
        return false;
      }
      var type = typeof index;
      if (type == 'number'
          ? (isArrayLike(object) && isIndex(index, object.length))
          : (type == 'string' && index in object)) {
        var other = object[index];
        return value === value ? (value === other) : (other !== other);
      }
      return false;
    }

    /**
     * Checks if `value` is a property name and not a property path.
     *
     * @private
     * @param {*} value The value to check.
     * @param {Object} [object] The object to query keys on.
     * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
     */
    function isKey(value, object) {
      var type = typeof value;
      if ((type == 'string' && reIsPlainProp.test(value)) || type == 'number') {
        return true;
      }
      if (isArray(value)) {
        return false;
      }
      var result = !reIsDeepProp.test(value);
      return result || (object != null && value in toObject(object));
    }

    /**
     * Checks if `func` has a lazy counterpart.
     *
     * @private
     * @param {Function} func The function to check.
     * @returns {boolean} Returns `true` if `func` has a lazy counterpart, else `false`.
     */
    function isLaziable(func) {
      var funcName = getFuncName(func);
      if (!(funcName in LazyWrapper.prototype)) {
        return false;
      }
      var other = lodash[funcName];
      if (func === other) {
        return true;
      }
      var data = getData(other);
      return !!data && func === data[0];
    }

    /**
     * Checks if `value` is a valid array-like length.
     *
     * **Note:** This function is based on [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
     */
    function isLength(value) {
      return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
    }

    /**
     * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` if suitable for strict
     *  equality comparisons, else `false`.
     */
    function isStrictComparable(value) {
      return value === value && !isObject(value);
    }

    /**
     * Merges the function metadata of `source` into `data`.
     *
     * Merging metadata reduces the number of wrappers required to invoke a function.
     * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
     * may be applied regardless of execution order. Methods like `_.ary` and `_.rearg`
     * augment function arguments, making the order in which they are executed important,
     * preventing the merging of metadata. However, we make an exception for a safe
     * common case where curried functions have `_.ary` and or `_.rearg` applied.
     *
     * @private
     * @param {Array} data The destination metadata.
     * @param {Array} source The source metadata.
     * @returns {Array} Returns `data`.
     */
    function mergeData(data, source) {
      var bitmask = data[1],
          srcBitmask = source[1],
          newBitmask = bitmask | srcBitmask,
          isCommon = newBitmask < ARY_FLAG;

      var isCombo =
        (srcBitmask == ARY_FLAG && bitmask == CURRY_FLAG) ||
        (srcBitmask == ARY_FLAG && bitmask == REARG_FLAG && data[7].length <= source[8]) ||
        (srcBitmask == (ARY_FLAG | REARG_FLAG) && bitmask == CURRY_FLAG);

      // Exit early if metadata can't be merged.
      if (!(isCommon || isCombo)) {
        return data;
      }
      // Use source `thisArg` if available.
      if (srcBitmask & BIND_FLAG) {
        data[2] = source[2];
        // Set when currying a bound function.
        newBitmask |= (bitmask & BIND_FLAG) ? 0 : CURRY_BOUND_FLAG;
      }
      // Compose partial arguments.
      var value = source[3];
      if (value) {
        var partials = data[3];
        data[3] = partials ? composeArgs(partials, value, source[4]) : arrayCopy(value);
        data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : arrayCopy(source[4]);
      }
      // Compose partial right arguments.
      value = source[5];
      if (value) {
        partials = data[5];
        data[5] = partials ? composeArgsRight(partials, value, source[6]) : arrayCopy(value);
        data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : arrayCopy(source[6]);
      }
      // Use source `argPos` if available.
      value = source[7];
      if (value) {
        data[7] = arrayCopy(value);
      }
      // Use source `ary` if it's smaller.
      if (srcBitmask & ARY_FLAG) {
        data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
      }
      // Use source `arity` if one is not provided.
      if (data[9] == null) {
        data[9] = source[9];
      }
      // Use source `func` and merge bitmasks.
      data[0] = source[0];
      data[1] = newBitmask;

      return data;
    }

    /**
     * Used by `_.defaultsDeep` to customize its `_.merge` use.
     *
     * @private
     * @param {*} objectValue The destination object property value.
     * @param {*} sourceValue The source object property value.
     * @returns {*} Returns the value to assign to the destination object.
     */
    function mergeDefaults(objectValue, sourceValue) {
      return objectValue === undefined ? sourceValue : merge(objectValue, sourceValue, mergeDefaults);
    }

    /**
     * A specialized version of `_.pick` which picks `object` properties specified
     * by `props`.
     *
     * @private
     * @param {Object} object The source object.
     * @param {string[]} props The property names to pick.
     * @returns {Object} Returns the new object.
     */
    function pickByArray(object, props) {
      object = toObject(object);

      var index = -1,
          length = props.length,
          result = {};

      while (++index < length) {
        var key = props[index];
        if (key in object) {
          result[key] = object[key];
        }
      }
      return result;
    }

    /**
     * A specialized version of `_.pick` which picks `object` properties `predicate`
     * returns truthy for.
     *
     * @private
     * @param {Object} object The source object.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {Object} Returns the new object.
     */
    function pickByCallback(object, predicate) {
      var result = {};
      baseForIn(object, function(value, key, object) {
        if (predicate(value, key, object)) {
          result[key] = value;
        }
      });
      return result;
    }

    /**
     * Reorder `array` according to the specified indexes where the element at
     * the first index is assigned as the first element, the element at
     * the second index is assigned as the second element, and so on.
     *
     * @private
     * @param {Array} array The array to reorder.
     * @param {Array} indexes The arranged array indexes.
     * @returns {Array} Returns `array`.
     */
    function reorder(array, indexes) {
      var arrLength = array.length,
          length = nativeMin(indexes.length, arrLength),
          oldArray = arrayCopy(array);

      while (length--) {
        var index = indexes[length];
        array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
      }
      return array;
    }

    /**
     * Sets metadata for `func`.
     *
     * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
     * period of time, it will trip its breaker and transition to an identity function
     * to avoid garbage collection pauses in V8. See [V8 issue 2070](https://code.google.com/p/v8/issues/detail?id=2070)
     * for more details.
     *
     * @private
     * @param {Function} func The function to associate metadata with.
     * @param {*} data The metadata.
     * @returns {Function} Returns `func`.
     */
    var setData = (function() {
      var count = 0,
          lastCalled = 0;

      return function(key, value) {
        var stamp = now(),
            remaining = HOT_SPAN - (stamp - lastCalled);

        lastCalled = stamp;
        if (remaining > 0) {
          if (++count >= HOT_COUNT) {
            return key;
          }
        } else {
          count = 0;
        }
        return baseSetData(key, value);
      };
    }());

    /**
     * A fallback implementation of `Object.keys` which creates an array of the
     * own enumerable property names of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     */
    function shimKeys(object) {
      var props = keysIn(object),
          propsLength = props.length,
          length = propsLength && object.length;

      var allowIndexes = !!length && isLength(length) &&
        (isArray(object) || isArguments(object));

      var index = -1,
          result = [];

      while (++index < propsLength) {
        var key = props[index];
        if ((allowIndexes && isIndex(key, length)) || hasOwnProperty.call(object, key)) {
          result.push(key);
        }
      }
      return result;
    }

    /**
     * Converts `value` to an array-like object if it's not one.
     *
     * @private
     * @param {*} value The value to process.
     * @returns {Array|Object} Returns the array-like object.
     */
    function toIterable(value) {
      if (value == null) {
        return [];
      }
      if (!isArrayLike(value)) {
        return values(value);
      }
      return isObject(value) ? value : Object(value);
    }

    /**
     * Converts `value` to an object if it's not one.
     *
     * @private
     * @param {*} value The value to process.
     * @returns {Object} Returns the object.
     */
    function toObject(value) {
      return isObject(value) ? value : Object(value);
    }

    /**
     * Converts `value` to property path array if it's not one.
     *
     * @private
     * @param {*} value The value to process.
     * @returns {Array} Returns the property path array.
     */
    function toPath(value) {
      if (isArray(value)) {
        return value;
      }
      var result = [];
      baseToString(value).replace(rePropName, function(match, number, quote, string) {
        result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
      });
      return result;
    }

    /**
     * Creates a clone of `wrapper`.
     *
     * @private
     * @param {Object} wrapper The wrapper to clone.
     * @returns {Object} Returns the cloned wrapper.
     */
    function wrapperClone(wrapper) {
      return wrapper instanceof LazyWrapper
        ? wrapper.clone()
        : new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__, arrayCopy(wrapper.__actions__));
    }

    /*------------------------------------------------------------------------*/

    /**
     * Creates an array of elements split into groups the length of `size`.
     * If `collection` can't be split evenly, the final chunk will be the remaining
     * elements.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to process.
     * @param {number} [size=1] The length of each chunk.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Array} Returns the new array containing chunks.
     * @example
     *
     * _.chunk(['a', 'b', 'c', 'd'], 2);
     * // => [['a', 'b'], ['c', 'd']]
     *
     * _.chunk(['a', 'b', 'c', 'd'], 3);
     * // => [['a', 'b', 'c'], ['d']]
     */
    function chunk(array, size, guard) {
      if (guard ? isIterateeCall(array, size, guard) : size == null) {
        size = 1;
      } else {
        size = nativeMax(nativeFloor(size) || 1, 1);
      }
      var index = 0,
          length = array ? array.length : 0,
          resIndex = -1,
          result = Array(nativeCeil(length / size));

      while (index < length) {
        result[++resIndex] = baseSlice(array, index, (index += size));
      }
      return result;
    }

    /**
     * Creates an array with all falsey values removed. The values `false`, `null`,
     * `0`, `""`, `undefined`, and `NaN` are falsey.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to compact.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * _.compact([0, 1, false, 2, '', 3]);
     * // => [1, 2, 3]
     */
    function compact(array) {
      var index = -1,
          length = array ? array.length : 0,
          resIndex = -1,
          result = [];

      while (++index < length) {
        var value = array[index];
        if (value) {
          result[++resIndex] = value;
        }
      }
      return result;
    }

    /**
     * Creates an array of unique `array` values not included in the other
     * provided arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {...Array} [values] The arrays of values to exclude.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * _.difference([1, 2, 3], [4, 2]);
     * // => [1, 3]
     */
    var difference = restParam(function(array, values) {
      return (isObjectLike(array) && isArrayLike(array))
        ? baseDifference(array, baseFlatten(values, false, true))
        : [];
    });

    /**
     * Creates a slice of `array` with `n` elements dropped from the beginning.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to drop.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.drop([1, 2, 3]);
     * // => [2, 3]
     *
     * _.drop([1, 2, 3], 2);
     * // => [3]
     *
     * _.drop([1, 2, 3], 5);
     * // => []
     *
     * _.drop([1, 2, 3], 0);
     * // => [1, 2, 3]
     */
    function drop(array, n, guard) {
      var length = array ? array.length : 0;
      if (!length) {
        return [];
      }
      if (guard ? isIterateeCall(array, n, guard) : n == null) {
        n = 1;
      }
      return baseSlice(array, n < 0 ? 0 : n);
    }

    /**
     * Creates a slice of `array` with `n` elements dropped from the end.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to drop.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.dropRight([1, 2, 3]);
     * // => [1, 2]
     *
     * _.dropRight([1, 2, 3], 2);
     * // => [1]
     *
     * _.dropRight([1, 2, 3], 5);
     * // => []
     *
     * _.dropRight([1, 2, 3], 0);
     * // => [1, 2, 3]
     */
    function dropRight(array, n, guard) {
      var length = array ? array.length : 0;
      if (!length) {
        return [];
      }
      if (guard ? isIterateeCall(array, n, guard) : n == null) {
        n = 1;
      }
      n = length - (+n || 0);
      return baseSlice(array, 0, n < 0 ? 0 : n);
    }

    /**
     * Creates a slice of `array` excluding elements dropped from the end.
     * Elements are dropped until `predicate` returns falsey. The predicate is
     * bound to `thisArg` and invoked with three arguments: (value, index, array).
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that match the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.dropRightWhile([1, 2, 3], function(n) {
     *   return n > 1;
     * });
     * // => [1]
     *
     * var users = [
     *   { 'user': 'barney',  'active': true },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': false }
     * ];
     *
     * // using the `_.matches` callback shorthand
     * _.pluck(_.dropRightWhile(users, { 'user': 'pebbles', 'active': false }), 'user');
     * // => ['barney', 'fred']
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.pluck(_.dropRightWhile(users, 'active', false), 'user');
     * // => ['barney']
     *
     * // using the `_.property` callback shorthand
     * _.pluck(_.dropRightWhile(users, 'active'), 'user');
     * // => ['barney', 'fred', 'pebbles']
     */
    function dropRightWhile(array, predicate, thisArg) {
      return (array && array.length)
        ? baseWhile(array, getCallback(predicate, thisArg, 3), true, true)
        : [];
    }

    /**
     * Creates a slice of `array` excluding elements dropped from the beginning.
     * Elements are dropped until `predicate` returns falsey. The predicate is
     * bound to `thisArg` and invoked with three arguments: (value, index, array).
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.dropWhile([1, 2, 3], function(n) {
     *   return n < 3;
     * });
     * // => [3]
     *
     * var users = [
     *   { 'user': 'barney',  'active': false },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': true }
     * ];
     *
     * // using the `_.matches` callback shorthand
     * _.pluck(_.dropWhile(users, { 'user': 'barney', 'active': false }), 'user');
     * // => ['fred', 'pebbles']
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.pluck(_.dropWhile(users, 'active', false), 'user');
     * // => ['pebbles']
     *
     * // using the `_.property` callback shorthand
     * _.pluck(_.dropWhile(users, 'active'), 'user');
     * // => ['barney', 'fred', 'pebbles']
     */
    function dropWhile(array, predicate, thisArg) {
      return (array && array.length)
        ? baseWhile(array, getCallback(predicate, thisArg, 3), true)
        : [];
    }

    /**
     * Fills elements of `array` with `value` from `start` up to, but not
     * including, `end`.
     *
     * **Note:** This method mutates `array`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to fill.
     * @param {*} value The value to fill `array` with.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [1, 2, 3];
     *
     * _.fill(array, 'a');
     * console.log(array);
     * // => ['a', 'a', 'a']
     *
     * _.fill(Array(3), 2);
     * // => [2, 2, 2]
     *
     * _.fill([4, 6, 8], '*', 1, 2);
     * // => [4, '*', 8]
     */
    function fill(array, value, start, end) {
      var length = array ? array.length : 0;
      if (!length) {
        return [];
      }
      if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
        start = 0;
        end = length;
      }
      return baseFill(array, value, start, end);
    }

    /**
     * This method is like `_.find` except that it returns the index of the first
     * element `predicate` returns truthy for instead of the element itself.
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to search.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {number} Returns the index of the found element, else `-1`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': false },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': true }
     * ];
     *
     * _.findIndex(users, function(chr) {
     *   return chr.user == 'barney';
     * });
     * // => 0
     *
     * // using the `_.matches` callback shorthand
     * _.findIndex(users, { 'user': 'fred', 'active': false });
     * // => 1
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.findIndex(users, 'active', false);
     * // => 0
     *
     * // using the `_.property` callback shorthand
     * _.findIndex(users, 'active');
     * // => 2
     */
    var findIndex = createFindIndex();

    /**
     * This method is like `_.findIndex` except that it iterates over elements
     * of `collection` from right to left.
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to search.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {number} Returns the index of the found element, else `-1`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': true },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': false }
     * ];
     *
     * _.findLastIndex(users, function(chr) {
     *   return chr.user == 'pebbles';
     * });
     * // => 2
     *
     * // using the `_.matches` callback shorthand
     * _.findLastIndex(users, { 'user': 'barney', 'active': true });
     * // => 0
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.findLastIndex(users, 'active', false);
     * // => 2
     *
     * // using the `_.property` callback shorthand
     * _.findLastIndex(users, 'active');
     * // => 0
     */
    var findLastIndex = createFindIndex(true);

    /**
     * Gets the first element of `array`.
     *
     * @static
     * @memberOf _
     * @alias head
     * @category Array
     * @param {Array} array The array to query.
     * @returns {*} Returns the first element of `array`.
     * @example
     *
     * _.first([1, 2, 3]);
     * // => 1
     *
     * _.first([]);
     * // => undefined
     */
    function first(array) {
      return array ? array[0] : undefined;
    }

    /**
     * Flattens a nested array. If `isDeep` is `true` the array is recursively
     * flattened, otherwise it is only flattened a single level.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to flatten.
     * @param {boolean} [isDeep] Specify a deep flatten.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * _.flatten([1, [2, 3, [4]]]);
     * // => [1, 2, 3, [4]]
     *
     * // using `isDeep`
     * _.flatten([1, [2, 3, [4]]], true);
     * // => [1, 2, 3, 4]
     */
    function flatten(array, isDeep, guard) {
      var length = array ? array.length : 0;
      if (guard && isIterateeCall(array, isDeep, guard)) {
        isDeep = false;
      }
      return length ? baseFlatten(array, isDeep) : [];
    }

    /**
     * Recursively flattens a nested array.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to recursively flatten.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * _.flattenDeep([1, [2, 3, [4]]]);
     * // => [1, 2, 3, 4]
     */
    function flattenDeep(array) {
      var length = array ? array.length : 0;
      return length ? baseFlatten(array, true) : [];
    }

    /**
     * Gets the index at which the first occurrence of `value` is found in `array`
     * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
     * for equality comparisons. If `fromIndex` is negative, it is used as the offset
     * from the end of `array`. If `array` is sorted providing `true` for `fromIndex`
     * performs a faster binary search.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to search.
     * @param {*} value The value to search for.
     * @param {boolean|number} [fromIndex=0] The index to search from or `true`
     *  to perform a binary search on a sorted array.
     * @returns {number} Returns the index of the matched value, else `-1`.
     * @example
     *
     * _.indexOf([1, 2, 1, 2], 2);
     * // => 1
     *
     * // using `fromIndex`
     * _.indexOf([1, 2, 1, 2], 2, 2);
     * // => 3
     *
     * // performing a binary search
     * _.indexOf([1, 1, 2, 2], 2, true);
     * // => 2
     */
    function indexOf(array, value, fromIndex) {
      var length = array ? array.length : 0;
      if (!length) {
        return -1;
      }
      if (typeof fromIndex == 'number') {
        fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex;
      } else if (fromIndex) {
        var index = binaryIndex(array, value);
        if (index < length &&
            (value === value ? (value === array[index]) : (array[index] !== array[index]))) {
          return index;
        }
        return -1;
      }
      return baseIndexOf(array, value, fromIndex || 0);
    }

    /**
     * Gets all but the last element of `array`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to query.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.initial([1, 2, 3]);
     * // => [1, 2]
     */
    function initial(array) {
      return dropRight(array, 1);
    }

    /**
     * Creates an array of unique values that are included in all of the provided
     * arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @returns {Array} Returns the new array of shared values.
     * @example
     * _.intersection([1, 2], [4, 2], [2, 1]);
     * // => [2]
     */
    var intersection = restParam(function(arrays) {
      var othLength = arrays.length,
          othIndex = othLength,
          caches = Array(length),
          indexOf = getIndexOf(),
          isCommon = indexOf == baseIndexOf,
          result = [];

      while (othIndex--) {
        var value = arrays[othIndex] = isArrayLike(value = arrays[othIndex]) ? value : [];
        caches[othIndex] = (isCommon && value.length >= 120) ? createCache(othIndex && value) : null;
      }
      var array = arrays[0],
          index = -1,
          length = array ? array.length : 0,
          seen = caches[0];

      outer:
      while (++index < length) {
        value = array[index];
        if ((seen ? cacheIndexOf(seen, value) : indexOf(result, value, 0)) < 0) {
          var othIndex = othLength;
          while (--othIndex) {
            var cache = caches[othIndex];
            if ((cache ? cacheIndexOf(cache, value) : indexOf(arrays[othIndex], value, 0)) < 0) {
              continue outer;
            }
          }
          if (seen) {
            seen.push(value);
          }
          result.push(value);
        }
      }
      return result;
    });

    /**
     * Gets the last element of `array`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to query.
     * @returns {*} Returns the last element of `array`.
     * @example
     *
     * _.last([1, 2, 3]);
     * // => 3
     */
    function last(array) {
      var length = array ? array.length : 0;
      return length ? array[length - 1] : undefined;
    }

    /**
     * This method is like `_.indexOf` except that it iterates over elements of
     * `array` from right to left.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to search.
     * @param {*} value The value to search for.
     * @param {boolean|number} [fromIndex=array.length-1] The index to search from
     *  or `true` to perform a binary search on a sorted array.
     * @returns {number} Returns the index of the matched value, else `-1`.
     * @example
     *
     * _.lastIndexOf([1, 2, 1, 2], 2);
     * // => 3
     *
     * // using `fromIndex`
     * _.lastIndexOf([1, 2, 1, 2], 2, 2);
     * // => 1
     *
     * // performing a binary search
     * _.lastIndexOf([1, 1, 2, 2], 2, true);
     * // => 3
     */
    function lastIndexOf(array, value, fromIndex) {
      var length = array ? array.length : 0;
      if (!length) {
        return -1;
      }
      var index = length;
      if (typeof fromIndex == 'number') {
        index = (fromIndex < 0 ? nativeMax(length + fromIndex, 0) : nativeMin(fromIndex || 0, length - 1)) + 1;
      } else if (fromIndex) {
        index = binaryIndex(array, value, true) - 1;
        var other = array[index];
        if (value === value ? (value === other) : (other !== other)) {
          return index;
        }
        return -1;
      }
      if (value !== value) {
        return indexOfNaN(array, index, true);
      }
      while (index--) {
        if (array[index] === value) {
          return index;
        }
      }
      return -1;
    }

    /**
     * Removes all provided values from `array` using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * **Note:** Unlike `_.without`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to modify.
     * @param {...*} [values] The values to remove.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [1, 2, 3, 1, 2, 3];
     *
     * _.pull(array, 2, 3);
     * console.log(array);
     * // => [1, 1]
     */
    function pull() {
      var args = arguments,
          array = args[0];

      if (!(array && array.length)) {
        return array;
      }
      var index = 0,
          indexOf = getIndexOf(),
          length = args.length;

      while (++index < length) {
        var fromIndex = 0,
            value = args[index];

        while ((fromIndex = indexOf(array, value, fromIndex)) > -1) {
          splice.call(array, fromIndex, 1);
        }
      }
      return array;
    }

    /**
     * Removes elements from `array` corresponding to the given indexes and returns
     * an array of the removed elements. Indexes may be specified as an array of
     * indexes or as individual arguments.
     *
     * **Note:** Unlike `_.at`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to modify.
     * @param {...(number|number[])} [indexes] The indexes of elements to remove,
     *  specified as individual indexes or arrays of indexes.
     * @returns {Array} Returns the new array of removed elements.
     * @example
     *
     * var array = [5, 10, 15, 20];
     * var evens = _.pullAt(array, 1, 3);
     *
     * console.log(array);
     * // => [5, 15]
     *
     * console.log(evens);
     * // => [10, 20]
     */
    var pullAt = restParam(function(array, indexes) {
      indexes = baseFlatten(indexes);

      var result = baseAt(array, indexes);
      basePullAt(array, indexes.sort(baseCompareAscending));
      return result;
    });

    /**
     * Removes all elements from `array` that `predicate` returns truthy for
     * and returns an array of the removed elements. The predicate is bound to
     * `thisArg` and invoked with three arguments: (value, index, array).
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * **Note:** Unlike `_.filter`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to modify.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {Array} Returns the new array of removed elements.
     * @example
     *
     * var array = [1, 2, 3, 4];
     * var evens = _.remove(array, function(n) {
     *   return n % 2 == 0;
     * });
     *
     * console.log(array);
     * // => [1, 3]
     *
     * console.log(evens);
     * // => [2, 4]
     */
    function remove(array, predicate, thisArg) {
      var result = [];
      if (!(array && array.length)) {
        return result;
      }
      var index = -1,
          indexes = [],
          length = array.length;

      predicate = getCallback(predicate, thisArg, 3);
      while (++index < length) {
        var value = array[index];
        if (predicate(value, index, array)) {
          result.push(value);
          indexes.push(index);
        }
      }
      basePullAt(array, indexes);
      return result;
    }

    /**
     * Gets all but the first element of `array`.
     *
     * @static
     * @memberOf _
     * @alias tail
     * @category Array
     * @param {Array} array The array to query.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.rest([1, 2, 3]);
     * // => [2, 3]
     */
    function rest(array) {
      return drop(array, 1);
    }

    /**
     * Creates a slice of `array` from `start` up to, but not including, `end`.
     *
     * **Note:** This method is used instead of `Array#slice` to support node
     * lists in IE < 9 and to ensure dense arrays are returned.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to slice.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns the slice of `array`.
     */
    function slice(array, start, end) {
      var length = array ? array.length : 0;
      if (!length) {
        return [];
      }
      if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
        start = 0;
        end = length;
      }
      return baseSlice(array, start, end);
    }

    /**
     * Uses a binary search to determine the lowest index at which `value` should
     * be inserted into `array` in order to maintain its sort order. If an iteratee
     * function is provided it is invoked for `value` and each element of `array`
     * to compute their sort ranking. The iteratee is bound to `thisArg` and
     * invoked with one argument; (value).
     *
     * If a property name is provided for `iteratee` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `iteratee` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * _.sortedIndex([30, 50], 40);
     * // => 1
     *
     * _.sortedIndex([4, 4, 5, 5], 5);
     * // => 2
     *
     * var dict = { 'data': { 'thirty': 30, 'forty': 40, 'fifty': 50 } };
     *
     * // using an iteratee function
     * _.sortedIndex(['thirty', 'fifty'], 'forty', function(word) {
     *   return this.data[word];
     * }, dict);
     * // => 1
     *
     * // using the `_.property` callback shorthand
     * _.sortedIndex([{ 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
     * // => 1
     */
    var sortedIndex = createSortedIndex();

    /**
     * This method is like `_.sortedIndex` except that it returns the highest
     * index at which `value` should be inserted into `array` in order to
     * maintain its sort order.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * _.sortedLastIndex([4, 4, 5, 5], 5);
     * // => 4
     */
    var sortedLastIndex = createSortedIndex(true);

    /**
     * Creates a slice of `array` with `n` elements taken from the beginning.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to take.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.take([1, 2, 3]);
     * // => [1]
     *
     * _.take([1, 2, 3], 2);
     * // => [1, 2]
     *
     * _.take([1, 2, 3], 5);
     * // => [1, 2, 3]
     *
     * _.take([1, 2, 3], 0);
     * // => []
     */
    function take(array, n, guard) {
      var length = array ? array.length : 0;
      if (!length) {
        return [];
      }
      if (guard ? isIterateeCall(array, n, guard) : n == null) {
        n = 1;
      }
      return baseSlice(array, 0, n < 0 ? 0 : n);
    }

    /**
     * Creates a slice of `array` with `n` elements taken from the end.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to take.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.takeRight([1, 2, 3]);
     * // => [3]
     *
     * _.takeRight([1, 2, 3], 2);
     * // => [2, 3]
     *
     * _.takeRight([1, 2, 3], 5);
     * // => [1, 2, 3]
     *
     * _.takeRight([1, 2, 3], 0);
     * // => []
     */
    function takeRight(array, n, guard) {
      var length = array ? array.length : 0;
      if (!length) {
        return [];
      }
      if (guard ? isIterateeCall(array, n, guard) : n == null) {
        n = 1;
      }
      n = length - (+n || 0);
      return baseSlice(array, n < 0 ? 0 : n);
    }

    /**
     * Creates a slice of `array` with elements taken from the end. Elements are
     * taken until `predicate` returns falsey. The predicate is bound to `thisArg`
     * and invoked with three arguments: (value, index, array).
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.takeRightWhile([1, 2, 3], function(n) {
     *   return n > 1;
     * });
     * // => [2, 3]
     *
     * var users = [
     *   { 'user': 'barney',  'active': true },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': false }
     * ];
     *
     * // using the `_.matches` callback shorthand
     * _.pluck(_.takeRightWhile(users, { 'user': 'pebbles', 'active': false }), 'user');
     * // => ['pebbles']
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.pluck(_.takeRightWhile(users, 'active', false), 'user');
     * // => ['fred', 'pebbles']
     *
     * // using the `_.property` callback shorthand
     * _.pluck(_.takeRightWhile(users, 'active'), 'user');
     * // => []
     */
    function takeRightWhile(array, predicate, thisArg) {
      return (array && array.length)
        ? baseWhile(array, getCallback(predicate, thisArg, 3), false, true)
        : [];
    }

    /**
     * Creates a slice of `array` with elements taken from the beginning. Elements
     * are taken until `predicate` returns falsey. The predicate is bound to
     * `thisArg` and invoked with three arguments: (value, index, array).
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.takeWhile([1, 2, 3], function(n) {
     *   return n < 3;
     * });
     * // => [1, 2]
     *
     * var users = [
     *   { 'user': 'barney',  'active': false },
     *   { 'user': 'fred',    'active': false},
     *   { 'user': 'pebbles', 'active': true }
     * ];
     *
     * // using the `_.matches` callback shorthand
     * _.pluck(_.takeWhile(users, { 'user': 'barney', 'active': false }), 'user');
     * // => ['barney']
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.pluck(_.takeWhile(users, 'active', false), 'user');
     * // => ['barney', 'fred']
     *
     * // using the `_.property` callback shorthand
     * _.pluck(_.takeWhile(users, 'active'), 'user');
     * // => []
     */
    function takeWhile(array, predicate, thisArg) {
      return (array && array.length)
        ? baseWhile(array, getCallback(predicate, thisArg, 3))
        : [];
    }

    /**
     * Creates an array of unique values, in order, from all of the provided arrays
     * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @returns {Array} Returns the new array of combined values.
     * @example
     *
     * _.union([1, 2], [4, 2], [2, 1]);
     * // => [1, 2, 4]
     */
    var union = restParam(function(arrays) {
      return baseUniq(baseFlatten(arrays, false, true));
    });

    /**
     * Creates a duplicate-free version of an array, using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
     * for equality comparisons, in which only the first occurence of each element
     * is kept. Providing `true` for `isSorted` performs a faster search algorithm
     * for sorted arrays. If an iteratee function is provided it is invoked for
     * each element in the array to generate the criterion by which uniqueness
     * is computed. The `iteratee` is bound to `thisArg` and invoked with three
     * arguments: (value, index, array).
     *
     * If a property name is provided for `iteratee` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `iteratee` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @alias unique
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {boolean} [isSorted] Specify the array is sorted.
     * @param {Function|Object|string} [iteratee] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Array} Returns the new duplicate-value-free array.
     * @example
     *
     * _.uniq([2, 1, 2]);
     * // => [2, 1]
     *
     * // using `isSorted`
     * _.uniq([1, 1, 2], true);
     * // => [1, 2]
     *
     * // using an iteratee function
     * _.uniq([1, 2.5, 1.5, 2], function(n) {
     *   return this.floor(n);
     * }, Math);
     * // => [1, 2.5]
     *
     * // using the `_.property` callback shorthand
     * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 1 }, { 'x': 2 }]
     */
    function uniq(array, isSorted, iteratee, thisArg) {
      var length = array ? array.length : 0;
      if (!length) {
        return [];
      }
      if (isSorted != null && typeof isSorted != 'boolean') {
        thisArg = iteratee;
        iteratee = isIterateeCall(array, isSorted, thisArg) ? undefined : isSorted;
        isSorted = false;
      }
      var callback = getCallback();
      if (!(iteratee == null && callback === baseCallback)) {
        iteratee = callback(iteratee, thisArg, 3);
      }
      return (isSorted && getIndexOf() == baseIndexOf)
        ? sortedUniq(array, iteratee)
        : baseUniq(array, iteratee);
    }

    /**
     * This method is like `_.zip` except that it accepts an array of grouped
     * elements and creates an array regrouping the elements to their pre-zip
     * configuration.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array of grouped elements to process.
     * @returns {Array} Returns the new array of regrouped elements.
     * @example
     *
     * var zipped = _.zip(['fred', 'barney'], [30, 40], [true, false]);
     * // => [['fred', 30, true], ['barney', 40, false]]
     *
     * _.unzip(zipped);
     * // => [['fred', 'barney'], [30, 40], [true, false]]
     */
    function unzip(array) {
      if (!(array && array.length)) {
        return [];
      }
      var index = -1,
          length = 0;

      array = arrayFilter(array, function(group) {
        if (isArrayLike(group)) {
          length = nativeMax(group.length, length);
          return true;
        }
      });
      var result = Array(length);
      while (++index < length) {
        result[index] = arrayMap(array, baseProperty(index));
      }
      return result;
    }

    /**
     * This method is like `_.unzip` except that it accepts an iteratee to specify
     * how regrouped values should be combined. The `iteratee` is bound to `thisArg`
     * and invoked with four arguments: (accumulator, value, index, group).
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array of grouped elements to process.
     * @param {Function} [iteratee] The function to combine regrouped values.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Array} Returns the new array of regrouped elements.
     * @example
     *
     * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
     * // => [[1, 10, 100], [2, 20, 200]]
     *
     * _.unzipWith(zipped, _.add);
     * // => [3, 30, 300]
     */
    function unzipWith(array, iteratee, thisArg) {
      var length = array ? array.length : 0;
      if (!length) {
        return [];
      }
      var result = unzip(array);
      if (iteratee == null) {
        return result;
      }
      iteratee = bindCallback(iteratee, thisArg, 4);
      return arrayMap(result, function(group) {
        return arrayReduce(group, iteratee, undefined, true);
      });
    }

    /**
     * Creates an array excluding all provided values using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {Array} array The array to filter.
     * @param {...*} [values] The values to exclude.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * _.without([1, 2, 1, 3], 1, 2);
     * // => [3]
     */
    var without = restParam(function(array, values) {
      return isArrayLike(array)
        ? baseDifference(array, values)
        : [];
    });

    /**
     * Creates an array of unique values that is the [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
     * of the provided arrays.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @returns {Array} Returns the new array of values.
     * @example
     *
     * _.xor([1, 2], [4, 2]);
     * // => [1, 4]
     */
    function xor() {
      var index = -1,
          length = arguments.length;

      while (++index < length) {
        var array = arguments[index];
        if (isArrayLike(array)) {
          var result = result
            ? arrayPush(baseDifference(result, array), baseDifference(array, result))
            : array;
        }
      }
      return result ? baseUniq(result) : [];
    }

    /**
     * Creates an array of grouped elements, the first of which contains the first
     * elements of the given arrays, the second of which contains the second elements
     * of the given arrays, and so on.
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {...Array} [arrays] The arrays to process.
     * @returns {Array} Returns the new array of grouped elements.
     * @example
     *
     * _.zip(['fred', 'barney'], [30, 40], [true, false]);
     * // => [['fred', 30, true], ['barney', 40, false]]
     */
    var zip = restParam(unzip);

    /**
     * The inverse of `_.pairs`; this method returns an object composed from arrays
     * of property names and values. Provide either a single two dimensional array,
     * e.g. `[[key1, value1], [key2, value2]]` or two arrays, one of property names
     * and one of corresponding values.
     *
     * @static
     * @memberOf _
     * @alias object
     * @category Array
     * @param {Array} props The property names.
     * @param {Array} [values=[]] The property values.
     * @returns {Object} Returns the new object.
     * @example
     *
     * _.zipObject([['fred', 30], ['barney', 40]]);
     * // => { 'fred': 30, 'barney': 40 }
     *
     * _.zipObject(['fred', 'barney'], [30, 40]);
     * // => { 'fred': 30, 'barney': 40 }
     */
    function zipObject(props, values) {
      var index = -1,
          length = props ? props.length : 0,
          result = {};

      if (length && !values && !isArray(props[0])) {
        values = [];
      }
      while (++index < length) {
        var key = props[index];
        if (values) {
          result[key] = values[index];
        } else if (key) {
          result[key[0]] = key[1];
        }
      }
      return result;
    }

    /**
     * This method is like `_.zip` except that it accepts an iteratee to specify
     * how grouped values should be combined. The `iteratee` is bound to `thisArg`
     * and invoked with four arguments: (accumulator, value, index, group).
     *
     * @static
     * @memberOf _
     * @category Array
     * @param {...Array} [arrays] The arrays to process.
     * @param {Function} [iteratee] The function to combine grouped values.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Array} Returns the new array of grouped elements.
     * @example
     *
     * _.zipWith([1, 2], [10, 20], [100, 200], _.add);
     * // => [111, 222]
     */
    var zipWith = restParam(function(arrays) {
      var length = arrays.length,
          iteratee = length > 2 ? arrays[length - 2] : undefined,
          thisArg = length > 1 ? arrays[length - 1] : undefined;

      if (length > 2 && typeof iteratee == 'function') {
        length -= 2;
      } else {
        iteratee = (length > 1 && typeof thisArg == 'function') ? (--length, thisArg) : undefined;
        thisArg = undefined;
      }
      arrays.length = length;
      return unzipWith(arrays, iteratee, thisArg);
    });

    /*------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` object that wraps `value` with explicit method
     * chaining enabled.
     *
     * @static
     * @memberOf _
     * @category Chain
     * @param {*} value The value to wrap.
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'age': 36 },
     *   { 'user': 'fred',    'age': 40 },
     *   { 'user': 'pebbles', 'age': 1 }
     * ];
     *
     * var youngest = _.chain(users)
     *   .sortBy('age')
     *   .map(function(chr) {
     *     return chr.user + ' is ' + chr.age;
     *   })
     *   .first()
     *   .value();
     * // => 'pebbles is 1'
     */
    function chain(value) {
      var result = lodash(value);
      result.__chain__ = true;
      return result;
    }

    /**
     * This method invokes `interceptor` and returns `value`. The interceptor is
     * bound to `thisArg` and invoked with one argument; (value). The purpose of
     * this method is to "tap into" a method chain in order to perform operations
     * on intermediate results within the chain.
     *
     * @static
     * @memberOf _
     * @category Chain
     * @param {*} value The value to provide to `interceptor`.
     * @param {Function} interceptor The function to invoke.
     * @param {*} [thisArg] The `this` binding of `interceptor`.
     * @returns {*} Returns `value`.
     * @example
     *
     * _([1, 2, 3])
     *  .tap(function(array) {
     *    array.pop();
     *  })
     *  .reverse()
     *  .value();
     * // => [2, 1]
     */
    function tap(value, interceptor, thisArg) {
      interceptor.call(thisArg, value);
      return value;
    }

    /**
     * This method is like `_.tap` except that it returns the result of `interceptor`.
     *
     * @static
     * @memberOf _
     * @category Chain
     * @param {*} value The value to provide to `interceptor`.
     * @param {Function} interceptor The function to invoke.
     * @param {*} [thisArg] The `this` binding of `interceptor`.
     * @returns {*} Returns the result of `interceptor`.
     * @example
     *
     * _('  abc  ')
     *  .chain()
     *  .trim()
     *  .thru(function(value) {
     *    return [value];
     *  })
     *  .value();
     * // => ['abc']
     */
    function thru(value, interceptor, thisArg) {
      return interceptor.call(thisArg, value);
    }

    /**
     * Enables explicit method chaining on the wrapper object.
     *
     * @name chain
     * @memberOf _
     * @category Chain
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36 },
     *   { 'user': 'fred',   'age': 40 }
     * ];
     *
     * // without explicit chaining
     * _(users).first();
     * // => { 'user': 'barney', 'age': 36 }
     *
     * // with explicit chaining
     * _(users).chain()
     *   .first()
     *   .pick('user')
     *   .value();
     * // => { 'user': 'barney' }
     */
    function wrapperChain() {
      return chain(this);
    }

    /**
     * Executes the chained sequence and returns the wrapped result.
     *
     * @name commit
     * @memberOf _
     * @category Chain
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var array = [1, 2];
     * var wrapped = _(array).push(3);
     *
     * console.log(array);
     * // => [1, 2]
     *
     * wrapped = wrapped.commit();
     * console.log(array);
     * // => [1, 2, 3]
     *
     * wrapped.last();
     * // => 3
     *
     * console.log(array);
     * // => [1, 2, 3]
     */
    function wrapperCommit() {
      return new LodashWrapper(this.value(), this.__chain__);
    }

    /**
     * Creates a new array joining a wrapped array with any additional arrays
     * and/or values.
     *
     * @name concat
     * @memberOf _
     * @category Chain
     * @param {...*} [values] The values to concatenate.
     * @returns {Array} Returns the new concatenated array.
     * @example
     *
     * var array = [1];
     * var wrapped = _(array).concat(2, [3], [[4]]);
     *
     * console.log(wrapped.value());
     * // => [1, 2, 3, [4]]
     *
     * console.log(array);
     * // => [1]
     */
    var wrapperConcat = restParam(function(values) {
      values = baseFlatten(values);
      return this.thru(function(array) {
        return arrayConcat(isArray(array) ? array : [toObject(array)], values);
      });
    });

    /**
     * Creates a clone of the chained sequence planting `value` as the wrapped value.
     *
     * @name plant
     * @memberOf _
     * @category Chain
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var array = [1, 2];
     * var wrapped = _(array).map(function(value) {
     *   return Math.pow(value, 2);
     * });
     *
     * var other = [3, 4];
     * var otherWrapped = wrapped.plant(other);
     *
     * otherWrapped.value();
     * // => [9, 16]
     *
     * wrapped.value();
     * // => [1, 4]
     */
    function wrapperPlant(value) {
      var result,
          parent = this;

      while (parent instanceof baseLodash) {
        var clone = wrapperClone(parent);
        if (result) {
          previous.__wrapped__ = clone;
        } else {
          result = clone;
        }
        var previous = clone;
        parent = parent.__wrapped__;
      }
      previous.__wrapped__ = value;
      return result;
    }

    /**
     * Reverses the wrapped array so the first element becomes the last, the
     * second element becomes the second to last, and so on.
     *
     * **Note:** This method mutates the wrapped array.
     *
     * @name reverse
     * @memberOf _
     * @category Chain
     * @returns {Object} Returns the new reversed `lodash` wrapper instance.
     * @example
     *
     * var array = [1, 2, 3];
     *
     * _(array).reverse().value()
     * // => [3, 2, 1]
     *
     * console.log(array);
     * // => [3, 2, 1]
     */
    function wrapperReverse() {
      var value = this.__wrapped__;

      var interceptor = function(value) {
        return (wrapped && wrapped.__dir__ < 0) ? value : value.reverse();
      };
      if (value instanceof LazyWrapper) {
        var wrapped = value;
        if (this.__actions__.length) {
          wrapped = new LazyWrapper(this);
        }
        wrapped = wrapped.reverse();
        wrapped.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
        return new LodashWrapper(wrapped, this.__chain__);
      }
      return this.thru(interceptor);
    }

    /**
     * Produces the result of coercing the unwrapped value to a string.
     *
     * @name toString
     * @memberOf _
     * @category Chain
     * @returns {string} Returns the coerced string value.
     * @example
     *
     * _([1, 2, 3]).toString();
     * // => '1,2,3'
     */
    function wrapperToString() {
      return (this.value() + '');
    }

    /**
     * Executes the chained sequence to extract the unwrapped value.
     *
     * @name value
     * @memberOf _
     * @alias run, toJSON, valueOf
     * @category Chain
     * @returns {*} Returns the resolved unwrapped value.
     * @example
     *
     * _([1, 2, 3]).value();
     * // => [1, 2, 3]
     */
    function wrapperValue() {
      return baseWrapperValue(this.__wrapped__, this.__actions__);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Creates an array of elements corresponding to the given keys, or indexes,
     * of `collection`. Keys may be specified as individual arguments or as arrays
     * of keys.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {...(number|number[]|string|string[])} [props] The property names
     *  or indexes of elements to pick, specified individually or in arrays.
     * @returns {Array} Returns the new array of picked elements.
     * @example
     *
     * _.at(['a', 'b', 'c'], [0, 2]);
     * // => ['a', 'c']
     *
     * _.at(['barney', 'fred', 'pebbles'], 0, 2);
     * // => ['barney', 'pebbles']
     */
    var at = restParam(function(collection, props) {
      return baseAt(collection, baseFlatten(props));
    });

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` through `iteratee`. The corresponding value
     * of each key is the number of times the key was returned by `iteratee`.
     * The `iteratee` is bound to `thisArg` and invoked with three arguments:
     * (value, index|key, collection).
     *
     * If a property name is provided for `iteratee` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `iteratee` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.countBy([4.3, 6.1, 6.4], function(n) {
     *   return Math.floor(n);
     * });
     * // => { '4': 1, '6': 2 }
     *
     * _.countBy([4.3, 6.1, 6.4], function(n) {
     *   return this.floor(n);
     * }, Math);
     * // => { '4': 1, '6': 2 }
     *
     * _.countBy(['one', 'two', 'three'], 'length');
     * // => { '3': 2, '5': 1 }
     */
    var countBy = createAggregator(function(result, value, key) {
      hasOwnProperty.call(result, key) ? ++result[key] : (result[key] = 1);
    });

    /**
     * Checks if `predicate` returns truthy for **all** elements of `collection`.
     * The predicate is bound to `thisArg` and invoked with three arguments:
     * (value, index|key, collection).
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @alias all
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {boolean} Returns `true` if all elements pass the predicate check,
     *  else `false`.
     * @example
     *
     * _.every([true, 1, null, 'yes'], Boolean);
     * // => false
     *
     * var users = [
     *   { 'user': 'barney', 'active': false },
     *   { 'user': 'fred',   'active': false }
     * ];
     *
     * // using the `_.matches` callback shorthand
     * _.every(users, { 'user': 'barney', 'active': false });
     * // => false
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.every(users, 'active', false);
     * // => true
     *
     * // using the `_.property` callback shorthand
     * _.every(users, 'active');
     * // => false
     */
    function every(collection, predicate, thisArg) {
      var func = isArray(collection) ? arrayEvery : baseEvery;
      if (thisArg && isIterateeCall(collection, predicate, thisArg)) {
        predicate = undefined;
      }
      if (typeof predicate != 'function' || thisArg !== undefined) {
        predicate = getCallback(predicate, thisArg, 3);
      }
      return func(collection, predicate);
    }

    /**
     * Iterates over elements of `collection`, returning an array of all elements
     * `predicate` returns truthy for. The predicate is bound to `thisArg` and
     * invoked with three arguments: (value, index|key, collection).
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @alias select
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {Array} Returns the new filtered array.
     * @example
     *
     * _.filter([4, 5, 6], function(n) {
     *   return n % 2 == 0;
     * });
     * // => [4, 6]
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': true },
     *   { 'user': 'fred',   'age': 40, 'active': false }
     * ];
     *
     * // using the `_.matches` callback shorthand
     * _.pluck(_.filter(users, { 'age': 36, 'active': true }), 'user');
     * // => ['barney']
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.pluck(_.filter(users, 'active', false), 'user');
     * // => ['fred']
     *
     * // using the `_.property` callback shorthand
     * _.pluck(_.filter(users, 'active'), 'user');
     * // => ['barney']
     */
    function filter(collection, predicate, thisArg) {
      var func = isArray(collection) ? arrayFilter : baseFilter;
      predicate = getCallback(predicate, thisArg, 3);
      return func(collection, predicate);
    }

    /**
     * Iterates over elements of `collection`, returning the first element
     * `predicate` returns truthy for. The predicate is bound to `thisArg` and
     * invoked with three arguments: (value, index|key, collection).
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @alias detect
     * @category Collection
     * @param {Array|Object|string} collection The collection to search.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {*} Returns the matched element, else `undefined`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'age': 36, 'active': true },
     *   { 'user': 'fred',    'age': 40, 'active': false },
     *   { 'user': 'pebbles', 'age': 1,  'active': true }
     * ];
     *
     * _.result(_.find(users, function(chr) {
     *   return chr.age < 40;
     * }), 'user');
     * // => 'barney'
     *
     * // using the `_.matches` callback shorthand
     * _.result(_.find(users, { 'age': 1, 'active': true }), 'user');
     * // => 'pebbles'
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.result(_.find(users, 'active', false), 'user');
     * // => 'fred'
     *
     * // using the `_.property` callback shorthand
     * _.result(_.find(users, 'active'), 'user');
     * // => 'barney'
     */
    var find = createFind(baseEach);

    /**
     * This method is like `_.find` except that it iterates over elements of
     * `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to search.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {*} Returns the matched element, else `undefined`.
     * @example
     *
     * _.findLast([1, 2, 3, 4], function(n) {
     *   return n % 2 == 1;
     * });
     * // => 3
     */
    var findLast = createFind(baseEachRight, true);

    /**
     * Performs a deep comparison between each element in `collection` and the
     * source object, returning the first element that has equivalent property
     * values.
     *
     * **Note:** This method supports comparing arrays, booleans, `Date` objects,
     * numbers, `Object` objects, regexes, and strings. Objects are compared by
     * their own, not inherited, enumerable properties. For comparing a single
     * own or inherited property value see `_.matchesProperty`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to search.
     * @param {Object} source The object of property values to match.
     * @returns {*} Returns the matched element, else `undefined`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': true },
     *   { 'user': 'fred',   'age': 40, 'active': false }
     * ];
     *
     * _.result(_.findWhere(users, { 'age': 36, 'active': true }), 'user');
     * // => 'barney'
     *
     * _.result(_.findWhere(users, { 'age': 40, 'active': false }), 'user');
     * // => 'fred'
     */
    function findWhere(collection, source) {
      return find(collection, baseMatches(source));
    }

    /**
     * Iterates over elements of `collection` invoking `iteratee` for each element.
     * The `iteratee` is bound to `thisArg` and invoked with three arguments:
     * (value, index|key, collection). Iteratee functions may exit iteration early
     * by explicitly returning `false`.
     *
     * **Note:** As with other "Collections" methods, objects with a "length" property
     * are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn`
     * may be used for object iteration.
     *
     * @static
     * @memberOf _
     * @alias each
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Array|Object|string} Returns `collection`.
     * @example
     *
     * _([1, 2]).forEach(function(n) {
     *   console.log(n);
     * }).value();
     * // => logs each value from left to right and returns the array
     *
     * _.forEach({ 'a': 1, 'b': 2 }, function(n, key) {
     *   console.log(n, key);
     * });
     * // => logs each value-key pair and returns the object (iteration order is not guaranteed)
     */
    var forEach = createForEach(arrayEach, baseEach);

    /**
     * This method is like `_.forEach` except that it iterates over elements of
     * `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @alias eachRight
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Array|Object|string} Returns `collection`.
     * @example
     *
     * _([1, 2]).forEachRight(function(n) {
     *   console.log(n);
     * }).value();
     * // => logs each value from right to left and returns the array
     */
    var forEachRight = createForEach(arrayEachRight, baseEachRight);

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` through `iteratee`. The corresponding value
     * of each key is an array of the elements responsible for generating the key.
     * The `iteratee` is bound to `thisArg` and invoked with three arguments:
     * (value, index|key, collection).
     *
     * If a property name is provided for `iteratee` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `iteratee` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.groupBy([4.2, 6.1, 6.4], function(n) {
     *   return Math.floor(n);
     * });
     * // => { '4': [4.2], '6': [6.1, 6.4] }
     *
     * _.groupBy([4.2, 6.1, 6.4], function(n) {
     *   return this.floor(n);
     * }, Math);
     * // => { '4': [4.2], '6': [6.1, 6.4] }
     *
     * // using the `_.property` callback shorthand
     * _.groupBy(['one', 'two', 'three'], 'length');
     * // => { '3': ['one', 'two'], '5': ['three'] }
     */
    var groupBy = createAggregator(function(result, value, key) {
      if (hasOwnProperty.call(result, key)) {
        result[key].push(value);
      } else {
        result[key] = [value];
      }
    });

    /**
     * Checks if `value` is in `collection` using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
     * for equality comparisons. If `fromIndex` is negative, it is used as the offset
     * from the end of `collection`.
     *
     * @static
     * @memberOf _
     * @alias contains, include
     * @category Collection
     * @param {Array|Object|string} collection The collection to search.
     * @param {*} target The value to search for.
     * @param {number} [fromIndex=0] The index to search from.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.reduce`.
     * @returns {boolean} Returns `true` if a matching element is found, else `false`.
     * @example
     *
     * _.includes([1, 2, 3], 1);
     * // => true
     *
     * _.includes([1, 2, 3], 1, 2);
     * // => false
     *
     * _.includes({ 'user': 'fred', 'age': 40 }, 'fred');
     * // => true
     *
     * _.includes('pebbles', 'eb');
     * // => true
     */
    function includes(collection, target, fromIndex, guard) {
      var length = collection ? getLength(collection) : 0;
      if (!isLength(length)) {
        collection = values(collection);
        length = collection.length;
      }
      if (typeof fromIndex != 'number' || (guard && isIterateeCall(target, fromIndex, guard))) {
        fromIndex = 0;
      } else {
        fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : (fromIndex || 0);
      }
      return (typeof collection == 'string' || !isArray(collection) && isString(collection))
        ? (fromIndex <= length && collection.indexOf(target, fromIndex) > -1)
        : (!!length && getIndexOf(collection, target, fromIndex) > -1);
    }

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` through `iteratee`. The corresponding value
     * of each key is the last element responsible for generating the key. The
     * iteratee function is bound to `thisArg` and invoked with three arguments:
     * (value, index|key, collection).
     *
     * If a property name is provided for `iteratee` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `iteratee` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * var keyData = [
     *   { 'dir': 'left', 'code': 97 },
     *   { 'dir': 'right', 'code': 100 }
     * ];
     *
     * _.indexBy(keyData, 'dir');
     * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
     *
     * _.indexBy(keyData, function(object) {
     *   return String.fromCharCode(object.code);
     * });
     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
     *
     * _.indexBy(keyData, function(object) {
     *   return this.fromCharCode(object.code);
     * }, String);
     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
     */
    var indexBy = createAggregator(function(result, value, key) {
      result[key] = value;
    });

    /**
     * Invokes the method at `path` of each element in `collection`, returning
     * an array of the results of each invoked method. Any additional arguments
     * are provided to each invoked method. If `methodName` is a function it is
     * invoked for, and `this` bound to, each element in `collection`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Array|Function|string} path The path of the method to invoke or
     *  the function invoked per iteration.
     * @param {...*} [args] The arguments to invoke the method with.
     * @returns {Array} Returns the array of results.
     * @example
     *
     * _.invoke([[5, 1, 7], [3, 2, 1]], 'sort');
     * // => [[1, 5, 7], [1, 2, 3]]
     *
     * _.invoke([123, 456], String.prototype.split, '');
     * // => [['1', '2', '3'], ['4', '5', '6']]
     */
    var invoke = restParam(function(collection, path, args) {
      var index = -1,
          isFunc = typeof path == 'function',
          isProp = isKey(path),
          result = isArrayLike(collection) ? Array(collection.length) : [];

      baseEach(collection, function(value) {
        var func = isFunc ? path : ((isProp && value != null) ? value[path] : undefined);
        result[++index] = func ? func.apply(value, args) : invokePath(value, path, args);
      });
      return result;
    });

    /**
     * Creates an array of values by running each element in `collection` through
     * `iteratee`. The `iteratee` is bound to `thisArg` and invoked with three
     * arguments: (value, index|key, collection).
     *
     * If a property name is provided for `iteratee` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `iteratee` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * Many lodash methods are guarded to work as iteratees for methods like
     * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
     *
     * The guarded methods are:
     * `ary`, `callback`, `chunk`, `clone`, `create`, `curry`, `curryRight`,
     * `drop`, `dropRight`, `every`, `fill`, `flatten`, `invert`, `max`, `min`,
     * `parseInt`, `slice`, `sortBy`, `take`, `takeRight`, `template`, `trim`,
     * `trimLeft`, `trimRight`, `trunc`, `random`, `range`, `sample`, `some`,
     * `sum`, `uniq`, and `words`
     *
     * @static
     * @memberOf _
     * @alias collect
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Array} Returns the new mapped array.
     * @example
     *
     * function timesThree(n) {
     *   return n * 3;
     * }
     *
     * _.map([1, 2], timesThree);
     * // => [3, 6]
     *
     * _.map({ 'a': 1, 'b': 2 }, timesThree);
     * // => [3, 6] (iteration order is not guaranteed)
     *
     * var users = [
     *   { 'user': 'barney' },
     *   { 'user': 'fred' }
     * ];
     *
     * // using the `_.property` callback shorthand
     * _.map(users, 'user');
     * // => ['barney', 'fred']
     */
    function map(collection, iteratee, thisArg) {
      var func = isArray(collection) ? arrayMap : baseMap;
      iteratee = getCallback(iteratee, thisArg, 3);
      return func(collection, iteratee);
    }

    /**
     * Creates an array of elements split into two groups, the first of which
     * contains elements `predicate` returns truthy for, while the second of which
     * contains elements `predicate` returns falsey for. The predicate is bound
     * to `thisArg` and invoked with three arguments: (value, index|key, collection).
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {Array} Returns the array of grouped elements.
     * @example
     *
     * _.partition([1, 2, 3], function(n) {
     *   return n % 2;
     * });
     * // => [[1, 3], [2]]
     *
     * _.partition([1.2, 2.3, 3.4], function(n) {
     *   return this.floor(n) % 2;
     * }, Math);
     * // => [[1.2, 3.4], [2.3]]
     *
     * var users = [
     *   { 'user': 'barney',  'age': 36, 'active': false },
     *   { 'user': 'fred',    'age': 40, 'active': true },
     *   { 'user': 'pebbles', 'age': 1,  'active': false }
     * ];
     *
     * var mapper = function(array) {
     *   return _.pluck(array, 'user');
     * };
     *
     * // using the `_.matches` callback shorthand
     * _.map(_.partition(users, { 'age': 1, 'active': false }), mapper);
     * // => [['pebbles'], ['barney', 'fred']]
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.map(_.partition(users, 'active', false), mapper);
     * // => [['barney', 'pebbles'], ['fred']]
     *
     * // using the `_.property` callback shorthand
     * _.map(_.partition(users, 'active'), mapper);
     * // => [['fred'], ['barney', 'pebbles']]
     */
    var partition = createAggregator(function(result, value, key) {
      result[key ? 0 : 1].push(value);
    }, function() { return [[], []]; });

    /**
     * Gets the property value of `path` from all elements in `collection`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Array|string} path The path of the property to pluck.
     * @returns {Array} Returns the property values.
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36 },
     *   { 'user': 'fred',   'age': 40 }
     * ];
     *
     * _.pluck(users, 'user');
     * // => ['barney', 'fred']
     *
     * var userIndex = _.indexBy(users, 'user');
     * _.pluck(userIndex, 'age');
     * // => [36, 40] (iteration order is not guaranteed)
     */
    function pluck(collection, path) {
      return map(collection, property(path));
    }

    /**
     * Reduces `collection` to a value which is the accumulated result of running
     * each element in `collection` through `iteratee`, where each successive
     * invocation is supplied the return value of the previous. If `accumulator`
     * is not provided the first element of `collection` is used as the initial
     * value. The `iteratee` is bound to `thisArg` and invoked with four arguments:
     * (accumulator, value, index|key, collection).
     *
     * Many lodash methods are guarded to work as iteratees for methods like
     * `_.reduce`, `_.reduceRight`, and `_.transform`.
     *
     * The guarded methods are:
     * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `sortByAll`,
     * and `sortByOrder`
     *
     * @static
     * @memberOf _
     * @alias foldl, inject
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [accumulator] The initial value.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * _.reduce([1, 2], function(total, n) {
     *   return total + n;
     * });
     * // => 3
     *
     * _.reduce({ 'a': 1, 'b': 2 }, function(result, n, key) {
     *   result[key] = n * 3;
     *   return result;
     * }, {});
     * // => { 'a': 3, 'b': 6 } (iteration order is not guaranteed)
     */
    var reduce = createReduce(arrayReduce, baseEach);

    /**
     * This method is like `_.reduce` except that it iterates over elements of
     * `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @alias foldr
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [accumulator] The initial value.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * var array = [[0, 1], [2, 3], [4, 5]];
     *
     * _.reduceRight(array, function(flattened, other) {
     *   return flattened.concat(other);
     * }, []);
     * // => [4, 5, 2, 3, 0, 1]
     */
    var reduceRight = createReduce(arrayReduceRight, baseEachRight);

    /**
     * The opposite of `_.filter`; this method returns the elements of `collection`
     * that `predicate` does **not** return truthy for.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {Array} Returns the new filtered array.
     * @example
     *
     * _.reject([1, 2, 3, 4], function(n) {
     *   return n % 2 == 0;
     * });
     * // => [1, 3]
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': false },
     *   { 'user': 'fred',   'age': 40, 'active': true }
     * ];
     *
     * // using the `_.matches` callback shorthand
     * _.pluck(_.reject(users, { 'age': 40, 'active': true }), 'user');
     * // => ['barney']
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.pluck(_.reject(users, 'active', false), 'user');
     * // => ['fred']
     *
     * // using the `_.property` callback shorthand
     * _.pluck(_.reject(users, 'active'), 'user');
     * // => ['barney']
     */
    function reject(collection, predicate, thisArg) {
      var func = isArray(collection) ? arrayFilter : baseFilter;
      predicate = getCallback(predicate, thisArg, 3);
      return func(collection, function(value, index, collection) {
        return !predicate(value, index, collection);
      });
    }

    /**
     * Gets a random element or `n` random elements from a collection.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to sample.
     * @param {number} [n] The number of elements to sample.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {*} Returns the random sample(s).
     * @example
     *
     * _.sample([1, 2, 3, 4]);
     * // => 2
     *
     * _.sample([1, 2, 3, 4], 2);
     * // => [3, 1]
     */
    function sample(collection, n, guard) {
      if (guard ? isIterateeCall(collection, n, guard) : n == null) {
        collection = toIterable(collection);
        var length = collection.length;
        return length > 0 ? collection[baseRandom(0, length - 1)] : undefined;
      }
      var index = -1,
          result = toArray(collection),
          length = result.length,
          lastIndex = length - 1;

      n = nativeMin(n < 0 ? 0 : (+n || 0), length);
      while (++index < n) {
        var rand = baseRandom(index, lastIndex),
            value = result[rand];

        result[rand] = result[index];
        result[index] = value;
      }
      result.length = n;
      return result;
    }

    /**
     * Creates an array of shuffled values, using a version of the
     * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to shuffle.
     * @returns {Array} Returns the new shuffled array.
     * @example
     *
     * _.shuffle([1, 2, 3, 4]);
     * // => [4, 1, 3, 2]
     */
    function shuffle(collection) {
      return sample(collection, POSITIVE_INFINITY);
    }

    /**
     * Gets the size of `collection` by returning its length for array-like
     * values or the number of own enumerable properties for objects.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to inspect.
     * @returns {number} Returns the size of `collection`.
     * @example
     *
     * _.size([1, 2, 3]);
     * // => 3
     *
     * _.size({ 'a': 1, 'b': 2 });
     * // => 2
     *
     * _.size('pebbles');
     * // => 7
     */
    function size(collection) {
      var length = collection ? getLength(collection) : 0;
      return isLength(length) ? length : keys(collection).length;
    }

    /**
     * Checks if `predicate` returns truthy for **any** element of `collection`.
     * The function returns as soon as it finds a passing value and does not iterate
     * over the entire collection. The predicate is bound to `thisArg` and invoked
     * with three arguments: (value, index|key, collection).
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @alias any
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {boolean} Returns `true` if any element passes the predicate check,
     *  else `false`.
     * @example
     *
     * _.some([null, 0, 'yes', false], Boolean);
     * // => true
     *
     * var users = [
     *   { 'user': 'barney', 'active': true },
     *   { 'user': 'fred',   'active': false }
     * ];
     *
     * // using the `_.matches` callback shorthand
     * _.some(users, { 'user': 'barney', 'active': false });
     * // => false
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.some(users, 'active', false);
     * // => true
     *
     * // using the `_.property` callback shorthand
     * _.some(users, 'active');
     * // => true
     */
    function some(collection, predicate, thisArg) {
      var func = isArray(collection) ? arraySome : baseSome;
      if (thisArg && isIterateeCall(collection, predicate, thisArg)) {
        predicate = undefined;
      }
      if (typeof predicate != 'function' || thisArg !== undefined) {
        predicate = getCallback(predicate, thisArg, 3);
      }
      return func(collection, predicate);
    }

    /**
     * Creates an array of elements, sorted in ascending order by the results of
     * running each element in a collection through `iteratee`. This method performs
     * a stable sort, that is, it preserves the original sort order of equal elements.
     * The `iteratee` is bound to `thisArg` and invoked with three arguments:
     * (value, index|key, collection).
     *
     * If a property name is provided for `iteratee` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `iteratee` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Array} Returns the new sorted array.
     * @example
     *
     * _.sortBy([1, 2, 3], function(n) {
     *   return Math.sin(n);
     * });
     * // => [3, 1, 2]
     *
     * _.sortBy([1, 2, 3], function(n) {
     *   return this.sin(n);
     * }, Math);
     * // => [3, 1, 2]
     *
     * var users = [
     *   { 'user': 'fred' },
     *   { 'user': 'pebbles' },
     *   { 'user': 'barney' }
     * ];
     *
     * // using the `_.property` callback shorthand
     * _.pluck(_.sortBy(users, 'user'), 'user');
     * // => ['barney', 'fred', 'pebbles']
     */
    function sortBy(collection, iteratee, thisArg) {
      if (collection == null) {
        return [];
      }
      if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
        iteratee = undefined;
      }
      var index = -1;
      iteratee = getCallback(iteratee, thisArg, 3);

      var result = baseMap(collection, function(value, key, collection) {
        return { 'criteria': iteratee(value, key, collection), 'index': ++index, 'value': value };
      });
      return baseSortBy(result, compareAscending);
    }

    /**
     * This method is like `_.sortBy` except that it can sort by multiple iteratees
     * or property names.
     *
     * If a property name is provided for an iteratee the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If an object is provided for an iteratee the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {...(Function|Function[]|Object|Object[]|string|string[])} iteratees
     *  The iteratees to sort by, specified as individual values or arrays of values.
     * @returns {Array} Returns the new sorted array.
     * @example
     *
     * var users = [
     *   { 'user': 'fred',   'age': 48 },
     *   { 'user': 'barney', 'age': 36 },
     *   { 'user': 'fred',   'age': 42 },
     *   { 'user': 'barney', 'age': 34 }
     * ];
     *
     * _.map(_.sortByAll(users, ['user', 'age']), _.values);
     * // => [['barney', 34], ['barney', 36], ['fred', 42], ['fred', 48]]
     *
     * _.map(_.sortByAll(users, 'user', function(chr) {
     *   return Math.floor(chr.age / 10);
     * }), _.values);
     * // => [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]]
     */
    var sortByAll = restParam(function(collection, iteratees) {
      if (collection == null) {
        return [];
      }
      var guard = iteratees[2];
      if (guard && isIterateeCall(iteratees[0], iteratees[1], guard)) {
        iteratees.length = 1;
      }
      return baseSortByOrder(collection, baseFlatten(iteratees), []);
    });

    /**
     * This method is like `_.sortByAll` except that it allows specifying the
     * sort orders of the iteratees to sort by. If `orders` is unspecified, all
     * values are sorted in ascending order. Otherwise, a value is sorted in
     * ascending order if its corresponding order is "asc", and descending if "desc".
     *
     * If a property name is provided for an iteratee the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If an object is provided for an iteratee the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
     * @param {boolean[]} [orders] The sort orders of `iteratees`.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.reduce`.
     * @returns {Array} Returns the new sorted array.
     * @example
     *
     * var users = [
     *   { 'user': 'fred',   'age': 48 },
     *   { 'user': 'barney', 'age': 34 },
     *   { 'user': 'fred',   'age': 42 },
     *   { 'user': 'barney', 'age': 36 }
     * ];
     *
     * // sort by `user` in ascending order and by `age` in descending order
     * _.map(_.sortByOrder(users, ['user', 'age'], ['asc', 'desc']), _.values);
     * // => [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]]
     */
    function sortByOrder(collection, iteratees, orders, guard) {
      if (collection == null) {
        return [];
      }
      if (guard && isIterateeCall(iteratees, orders, guard)) {
        orders = undefined;
      }
      if (!isArray(iteratees)) {
        iteratees = iteratees == null ? [] : [iteratees];
      }
      if (!isArray(orders)) {
        orders = orders == null ? [] : [orders];
      }
      return baseSortByOrder(collection, iteratees, orders);
    }

    /**
     * Performs a deep comparison between each element in `collection` and the
     * source object, returning an array of all elements that have equivalent
     * property values.
     *
     * **Note:** This method supports comparing arrays, booleans, `Date` objects,
     * numbers, `Object` objects, regexes, and strings. Objects are compared by
     * their own, not inherited, enumerable properties. For comparing a single
     * own or inherited property value see `_.matchesProperty`.
     *
     * @static
     * @memberOf _
     * @category Collection
     * @param {Array|Object|string} collection The collection to search.
     * @param {Object} source The object of property values to match.
     * @returns {Array} Returns the new filtered array.
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': false, 'pets': ['hoppy'] },
     *   { 'user': 'fred',   'age': 40, 'active': true, 'pets': ['baby puss', 'dino'] }
     * ];
     *
     * _.pluck(_.where(users, { 'age': 36, 'active': false }), 'user');
     * // => ['barney']
     *
     * _.pluck(_.where(users, { 'pets': ['dino'] }), 'user');
     * // => ['fred']
     */
    function where(collection, source) {
      return filter(collection, baseMatches(source));
    }

    /*------------------------------------------------------------------------*/

    /**
     * Gets the number of milliseconds that have elapsed since the Unix epoch
     * (1 January 1970 00:00:00 UTC).
     *
     * @static
     * @memberOf _
     * @category Date
     * @example
     *
     * _.defer(function(stamp) {
     *   console.log(_.now() - stamp);
     * }, _.now());
     * // => logs the number of milliseconds it took for the deferred function to be invoked
     */
    var now = nativeNow || function() {
      return new Date().getTime();
    };

    /*------------------------------------------------------------------------*/

    /**
     * The opposite of `_.before`; this method creates a function that invokes
     * `func` once it is called `n` or more times.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {number} n The number of calls before `func` is invoked.
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var saves = ['profile', 'settings'];
     *
     * var done = _.after(saves.length, function() {
     *   console.log('done saving!');
     * });
     *
     * _.forEach(saves, function(type) {
     *   asyncSave({ 'type': type, 'complete': done });
     * });
     * // => logs 'done saving!' after the two async saves have completed
     */
    function after(n, func) {
      if (typeof func != 'function') {
        if (typeof n == 'function') {
          var temp = n;
          n = func;
          func = temp;
        } else {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
      }
      n = nativeIsFinite(n = +n) ? n : 0;
      return function() {
        if (--n < 1) {
          return func.apply(this, arguments);
        }
      };
    }

    /**
     * Creates a function that accepts up to `n` arguments ignoring any
     * additional arguments.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to cap arguments for.
     * @param {number} [n=func.length] The arity cap.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Function} Returns the new function.
     * @example
     *
     * _.map(['6', '8', '10'], _.ary(parseInt, 1));
     * // => [6, 8, 10]
     */
    function ary(func, n, guard) {
      if (guard && isIterateeCall(func, n, guard)) {
        n = undefined;
      }
      n = (func && n == null) ? func.length : nativeMax(+n || 0, 0);
      return createWrapper(func, ARY_FLAG, undefined, undefined, undefined, undefined, n);
    }

    /**
     * Creates a function that invokes `func`, with the `this` binding and arguments
     * of the created function, while it is called less than `n` times. Subsequent
     * calls to the created function return the result of the last `func` invocation.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {number} n The number of calls at which `func` is no longer invoked.
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * jQuery('#add').on('click', _.before(5, addContactToList));
     * // => allows adding up to 4 contacts to the list
     */
    function before(n, func) {
      var result;
      if (typeof func != 'function') {
        if (typeof n == 'function') {
          var temp = n;
          n = func;
          func = temp;
        } else {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
      }
      return function() {
        if (--n > 0) {
          result = func.apply(this, arguments);
        }
        if (n <= 1) {
          func = undefined;
        }
        return result;
      };
    }

    /**
     * Creates a function that invokes `func` with the `this` binding of `thisArg`
     * and prepends any additional `_.bind` arguments to those provided to the
     * bound function.
     *
     * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
     * may be used as a placeholder for partially applied arguments.
     *
     * **Note:** Unlike native `Function#bind` this method does not set the "length"
     * property of bound functions.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to bind.
     * @param {*} thisArg The `this` binding of `func`.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * var greet = function(greeting, punctuation) {
     *   return greeting + ' ' + this.user + punctuation;
     * };
     *
     * var object = { 'user': 'fred' };
     *
     * var bound = _.bind(greet, object, 'hi');
     * bound('!');
     * // => 'hi fred!'
     *
     * // using placeholders
     * var bound = _.bind(greet, object, _, '!');
     * bound('hi');
     * // => 'hi fred!'
     */
    var bind = restParam(function(func, thisArg, partials) {
      var bitmask = BIND_FLAG;
      if (partials.length) {
        var holders = replaceHolders(partials, bind.placeholder);
        bitmask |= PARTIAL_FLAG;
      }
      return createWrapper(func, bitmask, thisArg, partials, holders);
    });

    /**
     * Binds methods of an object to the object itself, overwriting the existing
     * method. Method names may be specified as individual arguments or as arrays
     * of method names. If no method names are provided all enumerable function
     * properties, own and inherited, of `object` are bound.
     *
     * **Note:** This method does not set the "length" property of bound functions.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Object} object The object to bind and assign the bound methods to.
     * @param {...(string|string[])} [methodNames] The object method names to bind,
     *  specified as individual method names or arrays of method names.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var view = {
     *   'label': 'docs',
     *   'onClick': function() {
     *     console.log('clicked ' + this.label);
     *   }
     * };
     *
     * _.bindAll(view);
     * jQuery('#docs').on('click', view.onClick);
     * // => logs 'clicked docs' when the element is clicked
     */
    var bindAll = restParam(function(object, methodNames) {
      methodNames = methodNames.length ? baseFlatten(methodNames) : functions(object);

      var index = -1,
          length = methodNames.length;

      while (++index < length) {
        var key = methodNames[index];
        object[key] = createWrapper(object[key], BIND_FLAG, object);
      }
      return object;
    });

    /**
     * Creates a function that invokes the method at `object[key]` and prepends
     * any additional `_.bindKey` arguments to those provided to the bound function.
     *
     * This method differs from `_.bind` by allowing bound functions to reference
     * methods that may be redefined or don't yet exist.
     * See [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
     * for more details.
     *
     * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for partially applied arguments.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Object} object The object the method belongs to.
     * @param {string} key The key of the method.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * var object = {
     *   'user': 'fred',
     *   'greet': function(greeting, punctuation) {
     *     return greeting + ' ' + this.user + punctuation;
     *   }
     * };
     *
     * var bound = _.bindKey(object, 'greet', 'hi');
     * bound('!');
     * // => 'hi fred!'
     *
     * object.greet = function(greeting, punctuation) {
     *   return greeting + 'ya ' + this.user + punctuation;
     * };
     *
     * bound('!');
     * // => 'hiya fred!'
     *
     * // using placeholders
     * var bound = _.bindKey(object, 'greet', _, '!');
     * bound('hi');
     * // => 'hiya fred!'
     */
    var bindKey = restParam(function(object, key, partials) {
      var bitmask = BIND_FLAG | BIND_KEY_FLAG;
      if (partials.length) {
        var holders = replaceHolders(partials, bindKey.placeholder);
        bitmask |= PARTIAL_FLAG;
      }
      return createWrapper(key, bitmask, object, partials, holders);
    });

    /**
     * Creates a function that accepts one or more arguments of `func` that when
     * called either invokes `func` returning its result, if all `func` arguments
     * have been provided, or returns a function that accepts one or more of the
     * remaining `func` arguments, and so on. The arity of `func` may be specified
     * if `func.length` is not sufficient.
     *
     * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
     * may be used as a placeholder for provided arguments.
     *
     * **Note:** This method does not set the "length" property of curried functions.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to curry.
     * @param {number} [arity=func.length] The arity of `func`.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Function} Returns the new curried function.
     * @example
     *
     * var abc = function(a, b, c) {
     *   return [a, b, c];
     * };
     *
     * var curried = _.curry(abc);
     *
     * curried(1)(2)(3);
     * // => [1, 2, 3]
     *
     * curried(1, 2)(3);
     * // => [1, 2, 3]
     *
     * curried(1, 2, 3);
     * // => [1, 2, 3]
     *
     * // using placeholders
     * curried(1)(_, 3)(2);
     * // => [1, 2, 3]
     */
    var curry = createCurry(CURRY_FLAG);

    /**
     * This method is like `_.curry` except that arguments are applied to `func`
     * in the manner of `_.partialRight` instead of `_.partial`.
     *
     * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for provided arguments.
     *
     * **Note:** This method does not set the "length" property of curried functions.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to curry.
     * @param {number} [arity=func.length] The arity of `func`.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Function} Returns the new curried function.
     * @example
     *
     * var abc = function(a, b, c) {
     *   return [a, b, c];
     * };
     *
     * var curried = _.curryRight(abc);
     *
     * curried(3)(2)(1);
     * // => [1, 2, 3]
     *
     * curried(2, 3)(1);
     * // => [1, 2, 3]
     *
     * curried(1, 2, 3);
     * // => [1, 2, 3]
     *
     * // using placeholders
     * curried(3)(1, _)(2);
     * // => [1, 2, 3]
     */
    var curryRight = createCurry(CURRY_RIGHT_FLAG);

    /**
     * Creates a debounced function that delays invoking `func` until after `wait`
     * milliseconds have elapsed since the last time the debounced function was
     * invoked. The debounced function comes with a `cancel` method to cancel
     * delayed invocations. Provide an options object to indicate that `func`
     * should be invoked on the leading and/or trailing edge of the `wait` timeout.
     * Subsequent calls to the debounced function return the result of the last
     * `func` invocation.
     *
     * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
     * on the trailing edge of the timeout only if the the debounced function is
     * invoked more than once during the `wait` timeout.
     *
     * See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
     * for details over the differences between `_.debounce` and `_.throttle`.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to debounce.
     * @param {number} [wait=0] The number of milliseconds to delay.
     * @param {Object} [options] The options object.
     * @param {boolean} [options.leading=false] Specify invoking on the leading
     *  edge of the timeout.
     * @param {number} [options.maxWait] The maximum time `func` is allowed to be
     *  delayed before it is invoked.
     * @param {boolean} [options.trailing=true] Specify invoking on the trailing
     *  edge of the timeout.
     * @returns {Function} Returns the new debounced function.
     * @example
     *
     * // avoid costly calculations while the window size is in flux
     * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
     *
     * // invoke `sendMail` when the click event is fired, debouncing subsequent calls
     * jQuery('#postbox').on('click', _.debounce(sendMail, 300, {
     *   'leading': true,
     *   'trailing': false
     * }));
     *
     * // ensure `batchLog` is invoked once after 1 second of debounced calls
     * var source = new EventSource('/stream');
     * jQuery(source).on('message', _.debounce(batchLog, 250, {
     *   'maxWait': 1000
     * }));
     *
     * // cancel a debounced call
     * var todoChanges = _.debounce(batchLog, 1000);
     * Object.observe(models.todo, todoChanges);
     *
     * Object.observe(models, function(changes) {
     *   if (_.find(changes, { 'user': 'todo', 'type': 'delete'})) {
     *     todoChanges.cancel();
     *   }
     * }, ['delete']);
     *
     * // ...at some point `models.todo` is changed
     * models.todo.completed = true;
     *
     * // ...before 1 second has passed `models.todo` is deleted
     * // which cancels the debounced `todoChanges` call
     * delete models.todo;
     */
    function debounce(func, wait, options) {
      var args,
          maxTimeoutId,
          result,
          stamp,
          thisArg,
          timeoutId,
          trailingCall,
          lastCalled = 0,
          maxWait = false,
          trailing = true;

      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      wait = wait < 0 ? 0 : (+wait || 0);
      if (options === true) {
        var leading = true;
        trailing = false;
      } else if (isObject(options)) {
        leading = !!options.leading;
        maxWait = 'maxWait' in options && nativeMax(+options.maxWait || 0, wait);
        trailing = 'trailing' in options ? !!options.trailing : trailing;
      }

      function cancel() {
        if (timeoutId) {
          clearTimeout(timeoutId);
        }
        if (maxTimeoutId) {
          clearTimeout(maxTimeoutId);
        }
        lastCalled = 0;
        maxTimeoutId = timeoutId = trailingCall = undefined;
      }

      function complete(isCalled, id) {
        if (id) {
          clearTimeout(id);
        }
        maxTimeoutId = timeoutId = trailingCall = undefined;
        if (isCalled) {
          lastCalled = now();
          result = func.apply(thisArg, args);
          if (!timeoutId && !maxTimeoutId) {
            args = thisArg = undefined;
          }
        }
      }

      function delayed() {
        var remaining = wait - (now() - stamp);
        if (remaining <= 0 || remaining > wait) {
          complete(trailingCall, maxTimeoutId);
        } else {
          timeoutId = setTimeout(delayed, remaining);
        }
      }

      function maxDelayed() {
        complete(trailing, timeoutId);
      }

      function debounced() {
        args = arguments;
        stamp = now();
        thisArg = this;
        trailingCall = trailing && (timeoutId || !leading);

        if (maxWait === false) {
          var leadingCall = leading && !timeoutId;
        } else {
          if (!maxTimeoutId && !leading) {
            lastCalled = stamp;
          }
          var remaining = maxWait - (stamp - lastCalled),
              isCalled = remaining <= 0 || remaining > maxWait;

          if (isCalled) {
            if (maxTimeoutId) {
              maxTimeoutId = clearTimeout(maxTimeoutId);
            }
            lastCalled = stamp;
            result = func.apply(thisArg, args);
          }
          else if (!maxTimeoutId) {
            maxTimeoutId = setTimeout(maxDelayed, remaining);
          }
        }
        if (isCalled && timeoutId) {
          timeoutId = clearTimeout(timeoutId);
        }
        else if (!timeoutId && wait !== maxWait) {
          timeoutId = setTimeout(delayed, wait);
        }
        if (leadingCall) {
          isCalled = true;
          result = func.apply(thisArg, args);
        }
        if (isCalled && !timeoutId && !maxTimeoutId) {
          args = thisArg = undefined;
        }
        return result;
      }
      debounced.cancel = cancel;
      return debounced;
    }

    /**
     * Defers invoking the `func` until the current call stack has cleared. Any
     * additional arguments are provided to `func` when it is invoked.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to defer.
     * @param {...*} [args] The arguments to invoke the function with.
     * @returns {number} Returns the timer id.
     * @example
     *
     * _.defer(function(text) {
     *   console.log(text);
     * }, 'deferred');
     * // logs 'deferred' after one or more milliseconds
     */
    var defer = restParam(function(func, args) {
      return baseDelay(func, 1, args);
    });

    /**
     * Invokes `func` after `wait` milliseconds. Any additional arguments are
     * provided to `func` when it is invoked.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to delay.
     * @param {number} wait The number of milliseconds to delay invocation.
     * @param {...*} [args] The arguments to invoke the function with.
     * @returns {number} Returns the timer id.
     * @example
     *
     * _.delay(function(text) {
     *   console.log(text);
     * }, 1000, 'later');
     * // => logs 'later' after one second
     */
    var delay = restParam(function(func, wait, args) {
      return baseDelay(func, wait, args);
    });

    /**
     * Creates a function that returns the result of invoking the provided
     * functions with the `this` binding of the created function, where each
     * successive invocation is supplied the return value of the previous.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {...Function} [funcs] Functions to invoke.
     * @returns {Function} Returns the new function.
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var addSquare = _.flow(_.add, square);
     * addSquare(1, 2);
     * // => 9
     */
    var flow = createFlow();

    /**
     * This method is like `_.flow` except that it creates a function that
     * invokes the provided functions from right to left.
     *
     * @static
     * @memberOf _
     * @alias backflow, compose
     * @category Function
     * @param {...Function} [funcs] Functions to invoke.
     * @returns {Function} Returns the new function.
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var addSquare = _.flowRight(square, _.add);
     * addSquare(1, 2);
     * // => 9
     */
    var flowRight = createFlow(true);

    /**
     * Creates a function that memoizes the result of `func`. If `resolver` is
     * provided it determines the cache key for storing the result based on the
     * arguments provided to the memoized function. By default, the first argument
     * provided to the memoized function is coerced to a string and used as the
     * cache key. The `func` is invoked with the `this` binding of the memoized
     * function.
     *
     * **Note:** The cache is exposed as the `cache` property on the memoized
     * function. Its creation may be customized by replacing the `_.memoize.Cache`
     * constructor with one whose instances implement the [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
     * method interface of `get`, `has`, and `set`.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to have its output memoized.
     * @param {Function} [resolver] The function to resolve the cache key.
     * @returns {Function} Returns the new memoizing function.
     * @example
     *
     * var upperCase = _.memoize(function(string) {
     *   return string.toUpperCase();
     * });
     *
     * upperCase('fred');
     * // => 'FRED'
     *
     * // modifying the result cache
     * upperCase.cache.set('fred', 'BARNEY');
     * upperCase('fred');
     * // => 'BARNEY'
     *
     * // replacing `_.memoize.Cache`
     * var object = { 'user': 'fred' };
     * var other = { 'user': 'barney' };
     * var identity = _.memoize(_.identity);
     *
     * identity(object);
     * // => { 'user': 'fred' }
     * identity(other);
     * // => { 'user': 'fred' }
     *
     * _.memoize.Cache = WeakMap;
     * var identity = _.memoize(_.identity);
     *
     * identity(object);
     * // => { 'user': 'fred' }
     * identity(other);
     * // => { 'user': 'barney' }
     */
    function memoize(func, resolver) {
      if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      var memoized = function() {
        var args = arguments,
            key = resolver ? resolver.apply(this, args) : args[0],
            cache = memoized.cache;

        if (cache.has(key)) {
          return cache.get(key);
        }
        var result = func.apply(this, args);
        memoized.cache = cache.set(key, result);
        return result;
      };
      memoized.cache = new memoize.Cache;
      return memoized;
    }

    /**
     * Creates a function that runs each argument through a corresponding
     * transform function.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to wrap.
     * @param {...(Function|Function[])} [transforms] The functions to transform
     * arguments, specified as individual functions or arrays of functions.
     * @returns {Function} Returns the new function.
     * @example
     *
     * function doubled(n) {
     *   return n * 2;
     * }
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var modded = _.modArgs(function(x, y) {
     *   return [x, y];
     * }, square, doubled);
     *
     * modded(1, 2);
     * // => [1, 4]
     *
     * modded(5, 10);
     * // => [25, 20]
     */
    var modArgs = restParam(function(func, transforms) {
      transforms = baseFlatten(transforms);
      if (typeof func != 'function' || !arrayEvery(transforms, baseIsFunction)) {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      var length = transforms.length;
      return restParam(function(args) {
        var index = nativeMin(args.length, length);
        while (index--) {
          args[index] = transforms[index](args[index]);
        }
        return func.apply(this, args);
      });
    });

    /**
     * Creates a function that negates the result of the predicate `func`. The
     * `func` predicate is invoked with the `this` binding and arguments of the
     * created function.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} predicate The predicate to negate.
     * @returns {Function} Returns the new function.
     * @example
     *
     * function isEven(n) {
     *   return n % 2 == 0;
     * }
     *
     * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
     * // => [1, 3, 5]
     */
    function negate(predicate) {
      if (typeof predicate != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      return function() {
        return !predicate.apply(this, arguments);
      };
    }

    /**
     * Creates a function that is restricted to invoking `func` once. Repeat calls
     * to the function return the value of the first call. The `func` is invoked
     * with the `this` binding and arguments of the created function.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var initialize = _.once(createApplication);
     * initialize();
     * initialize();
     * // `initialize` invokes `createApplication` once
     */
    function once(func) {
      return before(2, func);
    }

    /**
     * Creates a function that invokes `func` with `partial` arguments prepended
     * to those provided to the new function. This method is like `_.bind` except
     * it does **not** alter the `this` binding.
     *
     * The `_.partial.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for partially applied arguments.
     *
     * **Note:** This method does not set the "length" property of partially
     * applied functions.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to partially apply arguments to.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * var greet = function(greeting, name) {
     *   return greeting + ' ' + name;
     * };
     *
     * var sayHelloTo = _.partial(greet, 'hello');
     * sayHelloTo('fred');
     * // => 'hello fred'
     *
     * // using placeholders
     * var greetFred = _.partial(greet, _, 'fred');
     * greetFred('hi');
     * // => 'hi fred'
     */
    var partial = createPartial(PARTIAL_FLAG);

    /**
     * This method is like `_.partial` except that partially applied arguments
     * are appended to those provided to the new function.
     *
     * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for partially applied arguments.
     *
     * **Note:** This method does not set the "length" property of partially
     * applied functions.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to partially apply arguments to.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * var greet = function(greeting, name) {
     *   return greeting + ' ' + name;
     * };
     *
     * var greetFred = _.partialRight(greet, 'fred');
     * greetFred('hi');
     * // => 'hi fred'
     *
     * // using placeholders
     * var sayHelloTo = _.partialRight(greet, 'hello', _);
     * sayHelloTo('fred');
     * // => 'hello fred'
     */
    var partialRight = createPartial(PARTIAL_RIGHT_FLAG);

    /**
     * Creates a function that invokes `func` with arguments arranged according
     * to the specified indexes where the argument value at the first index is
     * provided as the first argument, the argument value at the second index is
     * provided as the second argument, and so on.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to rearrange arguments for.
     * @param {...(number|number[])} indexes The arranged argument indexes,
     *  specified as individual indexes or arrays of indexes.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var rearged = _.rearg(function(a, b, c) {
     *   return [a, b, c];
     * }, 2, 0, 1);
     *
     * rearged('b', 'c', 'a')
     * // => ['a', 'b', 'c']
     *
     * var map = _.rearg(_.map, [1, 0]);
     * map(function(n) {
     *   return n * 3;
     * }, [1, 2, 3]);
     * // => [3, 6, 9]
     */
    var rearg = restParam(function(func, indexes) {
      return createWrapper(func, REARG_FLAG, undefined, undefined, undefined, baseFlatten(indexes));
    });

    /**
     * Creates a function that invokes `func` with the `this` binding of the
     * created function and arguments from `start` and beyond provided as an array.
     *
     * **Note:** This method is based on the [rest parameter](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters).
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to apply a rest parameter to.
     * @param {number} [start=func.length-1] The start position of the rest parameter.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var say = _.restParam(function(what, names) {
     *   return what + ' ' + _.initial(names).join(', ') +
     *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);
     * });
     *
     * say('hello', 'fred', 'barney', 'pebbles');
     * // => 'hello fred, barney, & pebbles'
     */
    function restParam(func, start) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      start = nativeMax(start === undefined ? (func.length - 1) : (+start || 0), 0);
      return function() {
        var args = arguments,
            index = -1,
            length = nativeMax(args.length - start, 0),
            rest = Array(length);

        while (++index < length) {
          rest[index] = args[start + index];
        }
        switch (start) {
          case 0: return func.call(this, rest);
          case 1: return func.call(this, args[0], rest);
          case 2: return func.call(this, args[0], args[1], rest);
        }
        var otherArgs = Array(start + 1);
        index = -1;
        while (++index < start) {
          otherArgs[index] = args[index];
        }
        otherArgs[start] = rest;
        return func.apply(this, otherArgs);
      };
    }

    /**
     * Creates a function that invokes `func` with the `this` binding of the created
     * function and an array of arguments much like [`Function#apply`](https://es5.github.io/#x15.3.4.3).
     *
     * **Note:** This method is based on the [spread operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_operator).
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to spread arguments over.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var say = _.spread(function(who, what) {
     *   return who + ' says ' + what;
     * });
     *
     * say(['fred', 'hello']);
     * // => 'fred says hello'
     *
     * // with a Promise
     * var numbers = Promise.all([
     *   Promise.resolve(40),
     *   Promise.resolve(36)
     * ]);
     *
     * numbers.then(_.spread(function(x, y) {
     *   return x + y;
     * }));
     * // => a Promise of 76
     */
    function spread(func) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      return function(array) {
        return func.apply(this, array);
      };
    }

    /**
     * Creates a throttled function that only invokes `func` at most once per
     * every `wait` milliseconds. The throttled function comes with a `cancel`
     * method to cancel delayed invocations. Provide an options object to indicate
     * that `func` should be invoked on the leading and/or trailing edge of the
     * `wait` timeout. Subsequent calls to the throttled function return the
     * result of the last `func` call.
     *
     * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
     * on the trailing edge of the timeout only if the the throttled function is
     * invoked more than once during the `wait` timeout.
     *
     * See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
     * for details over the differences between `_.throttle` and `_.debounce`.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {Function} func The function to throttle.
     * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
     * @param {Object} [options] The options object.
     * @param {boolean} [options.leading=true] Specify invoking on the leading
     *  edge of the timeout.
     * @param {boolean} [options.trailing=true] Specify invoking on the trailing
     *  edge of the timeout.
     * @returns {Function} Returns the new throttled function.
     * @example
     *
     * // avoid excessively updating the position while scrolling
     * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
     *
     * // invoke `renewToken` when the click event is fired, but not more than once every 5 minutes
     * jQuery('.interactive').on('click', _.throttle(renewToken, 300000, {
     *   'trailing': false
     * }));
     *
     * // cancel a trailing throttled call
     * jQuery(window).on('popstate', throttled.cancel);
     */
    function throttle(func, wait, options) {
      var leading = true,
          trailing = true;

      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      if (options === false) {
        leading = false;
      } else if (isObject(options)) {
        leading = 'leading' in options ? !!options.leading : leading;
        trailing = 'trailing' in options ? !!options.trailing : trailing;
      }
      return debounce(func, wait, { 'leading': leading, 'maxWait': +wait, 'trailing': trailing });
    }

    /**
     * Creates a function that provides `value` to the wrapper function as its
     * first argument. Any additional arguments provided to the function are
     * appended to those provided to the wrapper function. The wrapper is invoked
     * with the `this` binding of the created function.
     *
     * @static
     * @memberOf _
     * @category Function
     * @param {*} value The value to wrap.
     * @param {Function} wrapper The wrapper function.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var p = _.wrap(_.escape, function(func, text) {
     *   return '<p>' + func(text) + '</p>';
     * });
     *
     * p('fred, barney, & pebbles');
     * // => '<p>fred, barney, &amp; pebbles</p>'
     */
    function wrap(value, wrapper) {
      wrapper = wrapper == null ? identity : wrapper;
      return createWrapper(wrapper, PARTIAL_FLAG, undefined, [value], []);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Creates a clone of `value`. If `isDeep` is `true` nested objects are cloned,
     * otherwise they are assigned by reference. If `customizer` is provided it is
     * invoked to produce the cloned values. If `customizer` returns `undefined`
     * cloning is handled by the method instead. The `customizer` is bound to
     * `thisArg` and invoked with two argument; (value [, index|key, object]).
     *
     * **Note:** This method is loosely based on the
     * [structured clone algorithm](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm).
     * The enumerable properties of `arguments` objects and objects created by
     * constructors other than `Object` are cloned to plain `Object` objects. An
     * empty object is returned for uncloneable values such as functions, DOM nodes,
     * Maps, Sets, and WeakMaps.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to clone.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @param {Function} [customizer] The function to customize cloning values.
     * @param {*} [thisArg] The `this` binding of `customizer`.
     * @returns {*} Returns the cloned value.
     * @example
     *
     * var users = [
     *   { 'user': 'barney' },
     *   { 'user': 'fred' }
     * ];
     *
     * var shallow = _.clone(users);
     * shallow[0] === users[0];
     * // => true
     *
     * var deep = _.clone(users, true);
     * deep[0] === users[0];
     * // => false
     *
     * // using a customizer callback
     * var el = _.clone(document.body, function(value) {
     *   if (_.isElement(value)) {
     *     return value.cloneNode(false);
     *   }
     * });
     *
     * el === document.body
     * // => false
     * el.nodeName
     * // => BODY
     * el.childNodes.length;
     * // => 0
     */
    function clone(value, isDeep, customizer, thisArg) {
      if (isDeep && typeof isDeep != 'boolean' && isIterateeCall(value, isDeep, customizer)) {
        isDeep = false;
      }
      else if (typeof isDeep == 'function') {
        thisArg = customizer;
        customizer = isDeep;
        isDeep = false;
      }
      return typeof customizer == 'function'
        ? baseClone(value, isDeep, bindCallback(customizer, thisArg, 1))
        : baseClone(value, isDeep);
    }

    /**
     * Creates a deep clone of `value`. If `customizer` is provided it is invoked
     * to produce the cloned values. If `customizer` returns `undefined` cloning
     * is handled by the method instead. The `customizer` is bound to `thisArg`
     * and invoked with two argument; (value [, index|key, object]).
     *
     * **Note:** This method is loosely based on the
     * [structured clone algorithm](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm).
     * The enumerable properties of `arguments` objects and objects created by
     * constructors other than `Object` are cloned to plain `Object` objects. An
     * empty object is returned for uncloneable values such as functions, DOM nodes,
     * Maps, Sets, and WeakMaps.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to deep clone.
     * @param {Function} [customizer] The function to customize cloning values.
     * @param {*} [thisArg] The `this` binding of `customizer`.
     * @returns {*} Returns the deep cloned value.
     * @example
     *
     * var users = [
     *   { 'user': 'barney' },
     *   { 'user': 'fred' }
     * ];
     *
     * var deep = _.cloneDeep(users);
     * deep[0] === users[0];
     * // => false
     *
     * // using a customizer callback
     * var el = _.cloneDeep(document.body, function(value) {
     *   if (_.isElement(value)) {
     *     return value.cloneNode(true);
     *   }
     * });
     *
     * el === document.body
     * // => false
     * el.nodeName
     * // => BODY
     * el.childNodes.length;
     * // => 20
     */
    function cloneDeep(value, customizer, thisArg) {
      return typeof customizer == 'function'
        ? baseClone(value, true, bindCallback(customizer, thisArg, 1))
        : baseClone(value, true);
    }

    /**
     * Checks if `value` is greater than `other`.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is greater than `other`, else `false`.
     * @example
     *
     * _.gt(3, 1);
     * // => true
     *
     * _.gt(3, 3);
     * // => false
     *
     * _.gt(1, 3);
     * // => false
     */
    function gt(value, other) {
      return value > other;
    }

    /**
     * Checks if `value` is greater than or equal to `other`.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is greater than or equal to `other`, else `false`.
     * @example
     *
     * _.gte(3, 1);
     * // => true
     *
     * _.gte(3, 3);
     * // => true
     *
     * _.gte(1, 3);
     * // => false
     */
    function gte(value, other) {
      return value >= other;
    }

    /**
     * Checks if `value` is classified as an `arguments` object.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
     * @example
     *
     * _.isArguments(function() { return arguments; }());
     * // => true
     *
     * _.isArguments([1, 2, 3]);
     * // => false
     */
    function isArguments(value) {
      return isObjectLike(value) && isArrayLike(value) &&
        hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee');
    }

    /**
     * Checks if `value` is classified as an `Array` object.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
     * @example
     *
     * _.isArray([1, 2, 3]);
     * // => true
     *
     * _.isArray(function() { return arguments; }());
     * // => false
     */
    var isArray = nativeIsArray || function(value) {
      return isObjectLike(value) && isLength(value.length) && objToString.call(value) == arrayTag;
    };

    /**
     * Checks if `value` is classified as a boolean primitive or object.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
     * @example
     *
     * _.isBoolean(false);
     * // => true
     *
     * _.isBoolean(null);
     * // => false
     */
    function isBoolean(value) {
      return value === true || value === false || (isObjectLike(value) && objToString.call(value) == boolTag);
    }

    /**
     * Checks if `value` is classified as a `Date` object.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
     * @example
     *
     * _.isDate(new Date);
     * // => true
     *
     * _.isDate('Mon April 23 2012');
     * // => false
     */
    function isDate(value) {
      return isObjectLike(value) && objToString.call(value) == dateTag;
    }

    /**
     * Checks if `value` is a DOM element.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
     * @example
     *
     * _.isElement(document.body);
     * // => true
     *
     * _.isElement('<body>');
     * // => false
     */
    function isElement(value) {
      return !!value && value.nodeType === 1 && isObjectLike(value) && !isPlainObject(value);
    }

    /**
     * Checks if `value` is empty. A value is considered empty unless it is an
     * `arguments` object, array, string, or jQuery-like collection with a length
     * greater than `0` or an object with own enumerable properties.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {Array|Object|string} value The value to inspect.
     * @returns {boolean} Returns `true` if `value` is empty, else `false`.
     * @example
     *
     * _.isEmpty(null);
     * // => true
     *
     * _.isEmpty(true);
     * // => true
     *
     * _.isEmpty(1);
     * // => true
     *
     * _.isEmpty([1, 2, 3]);
     * // => false
     *
     * _.isEmpty({ 'a': 1 });
     * // => false
     */
    function isEmpty(value) {
      if (value == null) {
        return true;
      }
      if (isArrayLike(value) && (isArray(value) || isString(value) || isArguments(value) ||
          (isObjectLike(value) && isFunction(value.splice)))) {
        return !value.length;
      }
      return !keys(value).length;
    }

    /**
     * Performs a deep comparison between two values to determine if they are
     * equivalent. If `customizer` is provided it is invoked to compare values.
     * If `customizer` returns `undefined` comparisons are handled by the method
     * instead. The `customizer` is bound to `thisArg` and invoked with three
     * arguments: (value, other [, index|key]).
     *
     * **Note:** This method supports comparing arrays, booleans, `Date` objects,
     * numbers, `Object` objects, regexes, and strings. Objects are compared by
     * their own, not inherited, enumerable properties. Functions and DOM nodes
     * are **not** supported. Provide a customizer function to extend support
     * for comparing other values.
     *
     * @static
     * @memberOf _
     * @alias eq
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @param {Function} [customizer] The function to customize value comparisons.
     * @param {*} [thisArg] The `this` binding of `customizer`.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     * @example
     *
     * var object = { 'user': 'fred' };
     * var other = { 'user': 'fred' };
     *
     * object == other;
     * // => false
     *
     * _.isEqual(object, other);
     * // => true
     *
     * // using a customizer callback
     * var array = ['hello', 'goodbye'];
     * var other = ['hi', 'goodbye'];
     *
     * _.isEqual(array, other, function(value, other) {
     *   if (_.every([value, other], RegExp.prototype.test, /^h(?:i|ello)$/)) {
     *     return true;
     *   }
     * });
     * // => true
     */
    function isEqual(value, other, customizer, thisArg) {
      customizer = typeof customizer == 'function' ? bindCallback(customizer, thisArg, 3) : undefined;
      var result = customizer ? customizer(value, other) : undefined;
      return  result === undefined ? baseIsEqual(value, other, customizer) : !!result;
    }

    /**
     * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
     * `SyntaxError`, `TypeError`, or `URIError` object.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
     * @example
     *
     * _.isError(new Error);
     * // => true
     *
     * _.isError(Error);
     * // => false
     */
    function isError(value) {
      return isObjectLike(value) && typeof value.message == 'string' && objToString.call(value) == errorTag;
    }

    /**
     * Checks if `value` is a finite primitive number.
     *
     * **Note:** This method is based on [`Number.isFinite`](http://ecma-international.org/ecma-262/6.0/#sec-number.isfinite).
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
     * @example
     *
     * _.isFinite(10);
     * // => true
     *
     * _.isFinite('10');
     * // => false
     *
     * _.isFinite(true);
     * // => false
     *
     * _.isFinite(Object(10));
     * // => false
     *
     * _.isFinite(Infinity);
     * // => false
     */
    function isFinite(value) {
      return typeof value == 'number' && nativeIsFinite(value);
    }

    /**
     * Checks if `value` is classified as a `Function` object.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
     * @example
     *
     * _.isFunction(_);
     * // => true
     *
     * _.isFunction(/abc/);
     * // => false
     */
    function isFunction(value) {
      // The use of `Object#toString` avoids issues with the `typeof` operator
      // in older versions of Chrome and Safari which return 'function' for regexes
      // and Safari 8 equivalents which return 'object' for typed array constructors.
      return isObject(value) && objToString.call(value) == funcTag;
    }

    /**
     * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
     * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an object, else `false`.
     * @example
     *
     * _.isObject({});
     * // => true
     *
     * _.isObject([1, 2, 3]);
     * // => true
     *
     * _.isObject(1);
     * // => false
     */
    function isObject(value) {
      // Avoid a V8 JIT bug in Chrome 19-20.
      // See https://code.google.com/p/v8/issues/detail?id=2291 for more details.
      var type = typeof value;
      return !!value && (type == 'object' || type == 'function');
    }

    /**
     * Performs a deep comparison between `object` and `source` to determine if
     * `object` contains equivalent property values. If `customizer` is provided
     * it is invoked to compare values. If `customizer` returns `undefined`
     * comparisons are handled by the method instead. The `customizer` is bound
     * to `thisArg` and invoked with three arguments: (value, other, index|key).
     *
     * **Note:** This method supports comparing properties of arrays, booleans,
     * `Date` objects, numbers, `Object` objects, regexes, and strings. Functions
     * and DOM nodes are **not** supported. Provide a customizer function to extend
     * support for comparing other values.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property values to match.
     * @param {Function} [customizer] The function to customize value comparisons.
     * @param {*} [thisArg] The `this` binding of `customizer`.
     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
     * @example
     *
     * var object = { 'user': 'fred', 'age': 40 };
     *
     * _.isMatch(object, { 'age': 40 });
     * // => true
     *
     * _.isMatch(object, { 'age': 36 });
     * // => false
     *
     * // using a customizer callback
     * var object = { 'greeting': 'hello' };
     * var source = { 'greeting': 'hi' };
     *
     * _.isMatch(object, source, function(value, other) {
     *   return _.every([value, other], RegExp.prototype.test, /^h(?:i|ello)$/) || undefined;
     * });
     * // => true
     */
    function isMatch(object, source, customizer, thisArg) {
      customizer = typeof customizer == 'function' ? bindCallback(customizer, thisArg, 3) : undefined;
      return baseIsMatch(object, getMatchData(source), customizer);
    }

    /**
     * Checks if `value` is `NaN`.
     *
     * **Note:** This method is not the same as [`isNaN`](https://es5.github.io/#x15.1.2.4)
     * which returns `true` for `undefined` and other non-numeric values.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
     * @example
     *
     * _.isNaN(NaN);
     * // => true
     *
     * _.isNaN(new Number(NaN));
     * // => true
     *
     * isNaN(undefined);
     * // => true
     *
     * _.isNaN(undefined);
     * // => false
     */
    function isNaN(value) {
      // An `NaN` primitive is the only value that is not equal to itself.
      // Perform the `toStringTag` check first to avoid errors with some host objects in IE.
      return isNumber(value) && value != +value;
    }

    /**
     * Checks if `value` is a native function.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a native function, else `false`.
     * @example
     *
     * _.isNative(Array.prototype.push);
     * // => true
     *
     * _.isNative(_);
     * // => false
     */
    function isNative(value) {
      if (value == null) {
        return false;
      }
      if (isFunction(value)) {
        return reIsNative.test(fnToString.call(value));
      }
      return isObjectLike(value) && reIsHostCtor.test(value);
    }

    /**
     * Checks if `value` is `null`.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
     * @example
     *
     * _.isNull(null);
     * // => true
     *
     * _.isNull(void 0);
     * // => false
     */
    function isNull(value) {
      return value === null;
    }

    /**
     * Checks if `value` is classified as a `Number` primitive or object.
     *
     * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
     * as numbers, use the `_.isFinite` method.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
     * @example
     *
     * _.isNumber(8.4);
     * // => true
     *
     * _.isNumber(NaN);
     * // => true
     *
     * _.isNumber('8.4');
     * // => false
     */
    function isNumber(value) {
      return typeof value == 'number' || (isObjectLike(value) && objToString.call(value) == numberTag);
    }

    /**
     * Checks if `value` is a plain object, that is, an object created by the
     * `Object` constructor or one with a `[[Prototype]]` of `null`.
     *
     * **Note:** This method assumes objects created by the `Object` constructor
     * have no inherited enumerable properties.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     * }
     *
     * _.isPlainObject(new Foo);
     * // => false
     *
     * _.isPlainObject([1, 2, 3]);
     * // => false
     *
     * _.isPlainObject({ 'x': 0, 'y': 0 });
     * // => true
     *
     * _.isPlainObject(Object.create(null));
     * // => true
     */
    function isPlainObject(value) {
      var Ctor;

      // Exit early for non `Object` objects.
      if (!(isObjectLike(value) && objToString.call(value) == objectTag && !isArguments(value)) ||
          (!hasOwnProperty.call(value, 'constructor') && (Ctor = value.constructor, typeof Ctor == 'function' && !(Ctor instanceof Ctor)))) {
        return false;
      }
      // IE < 9 iterates inherited properties before own properties. If the first
      // iterated property is an object's own property then there are no inherited
      // enumerable properties.
      var result;
      // In most environments an object's own properties are iterated before
      // its inherited properties. If the last iterated property is an object's
      // own property then there are no inherited enumerable properties.
      baseForIn(value, function(subValue, key) {
        result = key;
      });
      return result === undefined || hasOwnProperty.call(value, result);
    }

    /**
     * Checks if `value` is classified as a `RegExp` object.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
     * @example
     *
     * _.isRegExp(/abc/);
     * // => true
     *
     * _.isRegExp('/abc/');
     * // => false
     */
    function isRegExp(value) {
      return isObject(value) && objToString.call(value) == regexpTag;
    }

    /**
     * Checks if `value` is classified as a `String` primitive or object.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
     * @example
     *
     * _.isString('abc');
     * // => true
     *
     * _.isString(1);
     * // => false
     */
    function isString(value) {
      return typeof value == 'string' || (isObjectLike(value) && objToString.call(value) == stringTag);
    }

    /**
     * Checks if `value` is classified as a typed array.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
     * @example
     *
     * _.isTypedArray(new Uint8Array);
     * // => true
     *
     * _.isTypedArray([]);
     * // => false
     */
    function isTypedArray(value) {
      return isObjectLike(value) && isLength(value.length) && !!typedArrayTags[objToString.call(value)];
    }

    /**
     * Checks if `value` is `undefined`.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
     * @example
     *
     * _.isUndefined(void 0);
     * // => true
     *
     * _.isUndefined(null);
     * // => false
     */
    function isUndefined(value) {
      return value === undefined;
    }

    /**
     * Checks if `value` is less than `other`.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is less than `other`, else `false`.
     * @example
     *
     * _.lt(1, 3);
     * // => true
     *
     * _.lt(3, 3);
     * // => false
     *
     * _.lt(3, 1);
     * // => false
     */
    function lt(value, other) {
      return value < other;
    }

    /**
     * Checks if `value` is less than or equal to `other`.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is less than or equal to `other`, else `false`.
     * @example
     *
     * _.lte(1, 3);
     * // => true
     *
     * _.lte(3, 3);
     * // => true
     *
     * _.lte(3, 1);
     * // => false
     */
    function lte(value, other) {
      return value <= other;
    }

    /**
     * Converts `value` to an array.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {Array} Returns the converted array.
     * @example
     *
     * (function() {
     *   return _.toArray(arguments).slice(1);
     * }(1, 2, 3));
     * // => [2, 3]
     */
    function toArray(value) {
      var length = value ? getLength(value) : 0;
      if (!isLength(length)) {
        return values(value);
      }
      if (!length) {
        return [];
      }
      return arrayCopy(value);
    }

    /**
     * Converts `value` to a plain object flattening inherited enumerable
     * properties of `value` to own properties of the plain object.
     *
     * @static
     * @memberOf _
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {Object} Returns the converted plain object.
     * @example
     *
     * function Foo() {
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.assign({ 'a': 1 }, new Foo);
     * // => { 'a': 1, 'b': 2 }
     *
     * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
     * // => { 'a': 1, 'b': 2, 'c': 3 }
     */
    function toPlainObject(value) {
      return baseCopy(value, keysIn(value));
    }

    /*------------------------------------------------------------------------*/

    /**
     * Recursively merges own enumerable properties of the source object(s), that
     * don't resolve to `undefined` into the destination object. Subsequent sources
     * overwrite property assignments of previous sources. If `customizer` is
     * provided it is invoked to produce the merged values of the destination and
     * source properties. If `customizer` returns `undefined` merging is handled
     * by the method instead. The `customizer` is bound to `thisArg` and invoked
     * with five arguments: (objectValue, sourceValue, key, object, source).
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @param {Function} [customizer] The function to customize assigned values.
     * @param {*} [thisArg] The `this` binding of `customizer`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var users = {
     *   'data': [{ 'user': 'barney' }, { 'user': 'fred' }]
     * };
     *
     * var ages = {
     *   'data': [{ 'age': 36 }, { 'age': 40 }]
     * };
     *
     * _.merge(users, ages);
     * // => { 'data': [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }] }
     *
     * // using a customizer callback
     * var object = {
     *   'fruits': ['apple'],
     *   'vegetables': ['beet']
     * };
     *
     * var other = {
     *   'fruits': ['banana'],
     *   'vegetables': ['carrot']
     * };
     *
     * _.merge(object, other, function(a, b) {
     *   if (_.isArray(a)) {
     *     return a.concat(b);
     *   }
     * });
     * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot'] }
     */
    var merge = createAssigner(baseMerge);

    /**
     * Assigns own enumerable properties of source object(s) to the destination
     * object. Subsequent sources overwrite property assignments of previous sources.
     * If `customizer` is provided it is invoked to produce the assigned values.
     * The `customizer` is bound to `thisArg` and invoked with five arguments:
     * (objectValue, sourceValue, key, object, source).
     *
     * **Note:** This method mutates `object` and is based on
     * [`Object.assign`](http://ecma-international.org/ecma-262/6.0/#sec-object.assign).
     *
     * @static
     * @memberOf _
     * @alias extend
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @param {Function} [customizer] The function to customize assigned values.
     * @param {*} [thisArg] The `this` binding of `customizer`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * _.assign({ 'user': 'barney' }, { 'age': 40 }, { 'user': 'fred' });
     * // => { 'user': 'fred', 'age': 40 }
     *
     * // using a customizer callback
     * var defaults = _.partialRight(_.assign, function(value, other) {
     *   return _.isUndefined(value) ? other : value;
     * });
     *
     * defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' });
     * // => { 'user': 'barney', 'age': 36 }
     */
    var assign = createAssigner(function(object, source, customizer) {
      return customizer
        ? assignWith(object, source, customizer)
        : baseAssign(object, source);
    });

    /**
     * Creates an object that inherits from the given `prototype` object. If a
     * `properties` object is provided its own enumerable properties are assigned
     * to the created object.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} prototype The object to inherit from.
     * @param {Object} [properties] The properties to assign to the object.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Object} Returns the new object.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * function Circle() {
     *   Shape.call(this);
     * }
     *
     * Circle.prototype = _.create(Shape.prototype, {
     *   'constructor': Circle
     * });
     *
     * var circle = new Circle;
     * circle instanceof Circle;
     * // => true
     *
     * circle instanceof Shape;
     * // => true
     */
    function create(prototype, properties, guard) {
      var result = baseCreate(prototype);
      if (guard && isIterateeCall(prototype, properties, guard)) {
        properties = undefined;
      }
      return properties ? baseAssign(result, properties) : result;
    }

    /**
     * Assigns own enumerable properties of source object(s) to the destination
     * object for all destination properties that resolve to `undefined`. Once a
     * property is set, additional values of the same property are ignored.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @example
     *
     * _.defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' });
     * // => { 'user': 'barney', 'age': 36 }
     */
    var defaults = createDefaults(assign, assignDefaults);

    /**
     * This method is like `_.defaults` except that it recursively assigns
     * default properties.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @example
     *
     * _.defaultsDeep({ 'user': { 'name': 'barney' } }, { 'user': { 'name': 'fred', 'age': 36 } });
     * // => { 'user': { 'name': 'barney', 'age': 36 } }
     *
     */
    var defaultsDeep = createDefaults(merge, mergeDefaults);

    /**
     * This method is like `_.find` except that it returns the key of the first
     * element `predicate` returns truthy for instead of the element itself.
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to search.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {string|undefined} Returns the key of the matched element, else `undefined`.
     * @example
     *
     * var users = {
     *   'barney':  { 'age': 36, 'active': true },
     *   'fred':    { 'age': 40, 'active': false },
     *   'pebbles': { 'age': 1,  'active': true }
     * };
     *
     * _.findKey(users, function(chr) {
     *   return chr.age < 40;
     * });
     * // => 'barney' (iteration order is not guaranteed)
     *
     * // using the `_.matches` callback shorthand
     * _.findKey(users, { 'age': 1, 'active': true });
     * // => 'pebbles'
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.findKey(users, 'active', false);
     * // => 'fred'
     *
     * // using the `_.property` callback shorthand
     * _.findKey(users, 'active');
     * // => 'barney'
     */
    var findKey = createFindKey(baseForOwn);

    /**
     * This method is like `_.findKey` except that it iterates over elements of
     * a collection in the opposite order.
     *
     * If a property name is provided for `predicate` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `predicate` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to search.
     * @param {Function|Object|string} [predicate=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {string|undefined} Returns the key of the matched element, else `undefined`.
     * @example
     *
     * var users = {
     *   'barney':  { 'age': 36, 'active': true },
     *   'fred':    { 'age': 40, 'active': false },
     *   'pebbles': { 'age': 1,  'active': true }
     * };
     *
     * _.findLastKey(users, function(chr) {
     *   return chr.age < 40;
     * });
     * // => returns `pebbles` assuming `_.findKey` returns `barney`
     *
     * // using the `_.matches` callback shorthand
     * _.findLastKey(users, { 'age': 36, 'active': true });
     * // => 'barney'
     *
     * // using the `_.matchesProperty` callback shorthand
     * _.findLastKey(users, 'active', false);
     * // => 'fred'
     *
     * // using the `_.property` callback shorthand
     * _.findLastKey(users, 'active');
     * // => 'pebbles'
     */
    var findLastKey = createFindKey(baseForOwnRight);

    /**
     * Iterates over own and inherited enumerable properties of an object invoking
     * `iteratee` for each property. The `iteratee` is bound to `thisArg` and invoked
     * with three arguments: (value, key, object). Iteratee functions may exit
     * iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forIn(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => logs 'a', 'b', and 'c' (iteration order is not guaranteed)
     */
    var forIn = createForIn(baseFor);

    /**
     * This method is like `_.forIn` except that it iterates over properties of
     * `object` in the opposite order.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forInRight(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => logs 'c', 'b', and 'a' assuming `_.forIn ` logs 'a', 'b', and 'c'
     */
    var forInRight = createForIn(baseForRight);

    /**
     * Iterates over own enumerable properties of an object invoking `iteratee`
     * for each property. The `iteratee` is bound to `thisArg` and invoked with
     * three arguments: (value, key, object). Iteratee functions may exit iteration
     * early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forOwn(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => logs 'a' and 'b' (iteration order is not guaranteed)
     */
    var forOwn = createForOwn(baseForOwn);

    /**
     * This method is like `_.forOwn` except that it iterates over properties of
     * `object` in the opposite order.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forOwnRight(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => logs 'b' and 'a' assuming `_.forOwn` logs 'a' and 'b'
     */
    var forOwnRight = createForOwn(baseForOwnRight);

    /**
     * Creates an array of function property names from all enumerable properties,
     * own and inherited, of `object`.
     *
     * @static
     * @memberOf _
     * @alias methods
     * @category Object
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns the new array of property names.
     * @example
     *
     * _.functions(_);
     * // => ['after', 'ary', 'assign', ...]
     */
    function functions(object) {
      return baseFunctions(object, keysIn(object));
    }

    /**
     * Gets the property value at `path` of `object`. If the resolved value is
     * `undefined` the `defaultValue` is used in its place.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the property to get.
     * @param {*} [defaultValue] The value returned if the resolved value is `undefined`.
     * @returns {*} Returns the resolved value.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
     *
     * _.get(object, 'a[0].b.c');
     * // => 3
     *
     * _.get(object, ['a', '0', 'b', 'c']);
     * // => 3
     *
     * _.get(object, 'a.b.c', 'default');
     * // => 'default'
     */
    function get(object, path, defaultValue) {
      var result = object == null ? undefined : baseGet(object, toPath(path), path + '');
      return result === undefined ? defaultValue : result;
    }

    /**
     * Checks if `path` is a direct property.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path to check.
     * @returns {boolean} Returns `true` if `path` is a direct property, else `false`.
     * @example
     *
     * var object = { 'a': { 'b': { 'c': 3 } } };
     *
     * _.has(object, 'a');
     * // => true
     *
     * _.has(object, 'a.b.c');
     * // => true
     *
     * _.has(object, ['a', 'b', 'c']);
     * // => true
     */
    function has(object, path) {
      if (object == null) {
        return false;
      }
      var result = hasOwnProperty.call(object, path);
      if (!result && !isKey(path)) {
        path = toPath(path);
        object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
        if (object == null) {
          return false;
        }
        path = last(path);
        result = hasOwnProperty.call(object, path);
      }
      return result || (isLength(object.length) && isIndex(path, object.length) &&
        (isArray(object) || isArguments(object)));
    }

    /**
     * Creates an object composed of the inverted keys and values of `object`.
     * If `object` contains duplicate values, subsequent values overwrite property
     * assignments of previous values unless `multiValue` is `true`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to invert.
     * @param {boolean} [multiValue] Allow multiple values per key.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Object} Returns the new inverted object.
     * @example
     *
     * var object = { 'a': 1, 'b': 2, 'c': 1 };
     *
     * _.invert(object);
     * // => { '1': 'c', '2': 'b' }
     *
     * // with `multiValue`
     * _.invert(object, true);
     * // => { '1': ['a', 'c'], '2': ['b'] }
     */
    function invert(object, multiValue, guard) {
      if (guard && isIterateeCall(object, multiValue, guard)) {
        multiValue = undefined;
      }
      var index = -1,
          props = keys(object),
          length = props.length,
          result = {};

      while (++index < length) {
        var key = props[index],
            value = object[key];

        if (multiValue) {
          if (hasOwnProperty.call(result, value)) {
            result[value].push(key);
          } else {
            result[value] = [key];
          }
        }
        else {
          result[value] = key;
        }
      }
      return result;
    }

    /**
     * Creates an array of the own enumerable property names of `object`.
     *
     * **Note:** Non-object values are coerced to objects. See the
     * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
     * for more details.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.keys(new Foo);
     * // => ['a', 'b'] (iteration order is not guaranteed)
     *
     * _.keys('hi');
     * // => ['0', '1']
     */
    var keys = !nativeKeys ? shimKeys : function(object) {
      var Ctor = object == null ? undefined : object.constructor;
      if ((typeof Ctor == 'function' && Ctor.prototype === object) ||
          (typeof object != 'function' && isArrayLike(object))) {
        return shimKeys(object);
      }
      return isObject(object) ? nativeKeys(object) : [];
    };

    /**
     * Creates an array of the own and inherited enumerable property names of `object`.
     *
     * **Note:** Non-object values are coerced to objects.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.keysIn(new Foo);
     * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
     */
    function keysIn(object) {
      if (object == null) {
        return [];
      }
      if (!isObject(object)) {
        object = Object(object);
      }
      var length = object.length;
      length = (length && isLength(length) &&
        (isArray(object) || isArguments(object)) && length) || 0;

      var Ctor = object.constructor,
          index = -1,
          isProto = typeof Ctor == 'function' && Ctor.prototype === object,
          result = Array(length),
          skipIndexes = length > 0;

      while (++index < length) {
        result[index] = (index + '');
      }
      for (var key in object) {
        if (!(skipIndexes && isIndex(key, length)) &&
            !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
          result.push(key);
        }
      }
      return result;
    }

    /**
     * The opposite of `_.mapValues`; this method creates an object with the
     * same values as `object` and keys generated by running each own enumerable
     * property of `object` through `iteratee`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Object} Returns the new mapped object.
     * @example
     *
     * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
     *   return key + value;
     * });
     * // => { 'a1': 1, 'b2': 2 }
     */
    var mapKeys = createObjectMapper(true);

    /**
     * Creates an object with the same keys as `object` and values generated by
     * running each own enumerable property of `object` through `iteratee`. The
     * iteratee function is bound to `thisArg` and invoked with three arguments:
     * (value, key, object).
     *
     * If a property name is provided for `iteratee` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `iteratee` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
     *  per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Object} Returns the new mapped object.
     * @example
     *
     * _.mapValues({ 'a': 1, 'b': 2 }, function(n) {
     *   return n * 3;
     * });
     * // => { 'a': 3, 'b': 6 }
     *
     * var users = {
     *   'fred':    { 'user': 'fred',    'age': 40 },
     *   'pebbles': { 'user': 'pebbles', 'age': 1 }
     * };
     *
     * // using the `_.property` callback shorthand
     * _.mapValues(users, 'age');
     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
     */
    var mapValues = createObjectMapper();

    /**
     * The opposite of `_.pick`; this method creates an object composed of the
     * own and inherited enumerable properties of `object` that are not omitted.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The source object.
     * @param {Function|...(string|string[])} [predicate] The function invoked per
     *  iteration or property names to omit, specified as individual property
     *  names or arrays of property names.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {Object} Returns the new object.
     * @example
     *
     * var object = { 'user': 'fred', 'age': 40 };
     *
     * _.omit(object, 'age');
     * // => { 'user': 'fred' }
     *
     * _.omit(object, _.isNumber);
     * // => { 'user': 'fred' }
     */
    var omit = restParam(function(object, props) {
      if (object == null) {
        return {};
      }
      if (typeof props[0] != 'function') {
        var props = arrayMap(baseFlatten(props), String);
        return pickByArray(object, baseDifference(keysIn(object), props));
      }
      var predicate = bindCallback(props[0], props[1], 3);
      return pickByCallback(object, function(value, key, object) {
        return !predicate(value, key, object);
      });
    });

    /**
     * Creates a two dimensional array of the key-value pairs for `object`,
     * e.g. `[[key1, value1], [key2, value2]]`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the new array of key-value pairs.
     * @example
     *
     * _.pairs({ 'barney': 36, 'fred': 40 });
     * // => [['barney', 36], ['fred', 40]] (iteration order is not guaranteed)
     */
    function pairs(object) {
      object = toObject(object);

      var index = -1,
          props = keys(object),
          length = props.length,
          result = Array(length);

      while (++index < length) {
        var key = props[index];
        result[index] = [key, object[key]];
      }
      return result;
    }

    /**
     * Creates an object composed of the picked `object` properties. Property
     * names may be specified as individual arguments or as arrays of property
     * names. If `predicate` is provided it is invoked for each property of `object`
     * picking the properties `predicate` returns truthy for. The predicate is
     * bound to `thisArg` and invoked with three arguments: (value, key, object).
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The source object.
     * @param {Function|...(string|string[])} [predicate] The function invoked per
     *  iteration or property names to pick, specified as individual property
     *  names or arrays of property names.
     * @param {*} [thisArg] The `this` binding of `predicate`.
     * @returns {Object} Returns the new object.
     * @example
     *
     * var object = { 'user': 'fred', 'age': 40 };
     *
     * _.pick(object, 'user');
     * // => { 'user': 'fred' }
     *
     * _.pick(object, _.isString);
     * // => { 'user': 'fred' }
     */
    var pick = restParam(function(object, props) {
      if (object == null) {
        return {};
      }
      return typeof props[0] == 'function'
        ? pickByCallback(object, bindCallback(props[0], props[1], 3))
        : pickByArray(object, baseFlatten(props));
    });

    /**
     * This method is like `_.get` except that if the resolved value is a function
     * it is invoked with the `this` binding of its parent object and its result
     * is returned.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the property to resolve.
     * @param {*} [defaultValue] The value returned if the resolved value is `undefined`.
     * @returns {*} Returns the resolved value.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
     *
     * _.result(object, 'a[0].b.c1');
     * // => 3
     *
     * _.result(object, 'a[0].b.c2');
     * // => 4
     *
     * _.result(object, 'a.b.c', 'default');
     * // => 'default'
     *
     * _.result(object, 'a.b.c', _.constant('default'));
     * // => 'default'
     */
    function result(object, path, defaultValue) {
      var result = object == null ? undefined : object[path];
      if (result === undefined) {
        if (object != null && !isKey(path, object)) {
          path = toPath(path);
          object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
          result = object == null ? undefined : object[last(path)];
        }
        result = result === undefined ? defaultValue : result;
      }
      return isFunction(result) ? result.call(object) : result;
    }

    /**
     * Sets the property value of `path` on `object`. If a portion of `path`
     * does not exist it is created.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to augment.
     * @param {Array|string} path The path of the property to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
     *
     * _.set(object, 'a[0].b.c', 4);
     * console.log(object.a[0].b.c);
     * // => 4
     *
     * _.set(object, 'x[0].y.z', 5);
     * console.log(object.x[0].y.z);
     * // => 5
     */
    function set(object, path, value) {
      if (object == null) {
        return object;
      }
      var pathKey = (path + '');
      path = (object[pathKey] != null || isKey(path, object)) ? [pathKey] : toPath(path);

      var index = -1,
          length = path.length,
          lastIndex = length - 1,
          nested = object;

      while (nested != null && ++index < length) {
        var key = path[index];
        if (isObject(nested)) {
          if (index == lastIndex) {
            nested[key] = value;
          } else if (nested[key] == null) {
            nested[key] = isIndex(path[index + 1]) ? [] : {};
          }
        }
        nested = nested[key];
      }
      return object;
    }

    /**
     * An alternative to `_.reduce`; this method transforms `object` to a new
     * `accumulator` object which is the result of running each of its own enumerable
     * properties through `iteratee`, with each invocation potentially mutating
     * the `accumulator` object. The `iteratee` is bound to `thisArg` and invoked
     * with four arguments: (accumulator, value, key, object). Iteratee functions
     * may exit iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Array|Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [accumulator] The custom accumulator value.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * _.transform([2, 3, 4], function(result, n) {
     *   result.push(n *= n);
     *   return n % 2 == 0;
     * });
     * // => [4, 9]
     *
     * _.transform({ 'a': 1, 'b': 2 }, function(result, n, key) {
     *   result[key] = n * 3;
     * });
     * // => { 'a': 3, 'b': 6 }
     */
    function transform(object, iteratee, accumulator, thisArg) {
      var isArr = isArray(object) || isTypedArray(object);
      iteratee = getCallback(iteratee, thisArg, 4);

      if (accumulator == null) {
        if (isArr || isObject(object)) {
          var Ctor = object.constructor;
          if (isArr) {
            accumulator = isArray(object) ? new Ctor : [];
          } else {
            accumulator = baseCreate(isFunction(Ctor) ? Ctor.prototype : undefined);
          }
        } else {
          accumulator = {};
        }
      }
      (isArr ? arrayEach : baseForOwn)(object, function(value, index, object) {
        return iteratee(accumulator, value, index, object);
      });
      return accumulator;
    }

    /**
     * Creates an array of the own enumerable property values of `object`.
     *
     * **Note:** Non-object values are coerced to objects.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property values.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.values(new Foo);
     * // => [1, 2] (iteration order is not guaranteed)
     *
     * _.values('hi');
     * // => ['h', 'i']
     */
    function values(object) {
      return baseValues(object, keys(object));
    }

    /**
     * Creates an array of the own and inherited enumerable property values
     * of `object`.
     *
     * **Note:** Non-object values are coerced to objects.
     *
     * @static
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property values.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.valuesIn(new Foo);
     * // => [1, 2, 3] (iteration order is not guaranteed)
     */
    function valuesIn(object) {
      return baseValues(object, keysIn(object));
    }

    /*------------------------------------------------------------------------*/

    /**
     * Checks if `n` is between `start` and up to but not including, `end`. If
     * `end` is not specified it is set to `start` with `start` then set to `0`.
     *
     * @static
     * @memberOf _
     * @category Number
     * @param {number} n The number to check.
     * @param {number} [start=0] The start of the range.
     * @param {number} end The end of the range.
     * @returns {boolean} Returns `true` if `n` is in the range, else `false`.
     * @example
     *
     * _.inRange(3, 2, 4);
     * // => true
     *
     * _.inRange(4, 8);
     * // => true
     *
     * _.inRange(4, 2);
     * // => false
     *
     * _.inRange(2, 2);
     * // => false
     *
     * _.inRange(1.2, 2);
     * // => true
     *
     * _.inRange(5.2, 4);
     * // => false
     */
    function inRange(value, start, end) {
      start = +start || 0;
      if (end === undefined) {
        end = start;
        start = 0;
      } else {
        end = +end || 0;
      }
      return value >= nativeMin(start, end) && value < nativeMax(start, end);
    }

    /**
     * Produces a random number between `min` and `max` (inclusive). If only one
     * argument is provided a number between `0` and the given number is returned.
     * If `floating` is `true`, or either `min` or `max` are floats, a floating-point
     * number is returned instead of an integer.
     *
     * @static
     * @memberOf _
     * @category Number
     * @param {number} [min=0] The minimum possible value.
     * @param {number} [max=1] The maximum possible value.
     * @param {boolean} [floating] Specify returning a floating-point number.
     * @returns {number} Returns the random number.
     * @example
     *
     * _.random(0, 5);
     * // => an integer between 0 and 5
     *
     * _.random(5);
     * // => also an integer between 0 and 5
     *
     * _.random(5, true);
     * // => a floating-point number between 0 and 5
     *
     * _.random(1.2, 5.2);
     * // => a floating-point number between 1.2 and 5.2
     */
    function random(min, max, floating) {
      if (floating && isIterateeCall(min, max, floating)) {
        max = floating = undefined;
      }
      var noMin = min == null,
          noMax = max == null;

      if (floating == null) {
        if (noMax && typeof min == 'boolean') {
          floating = min;
          min = 1;
        }
        else if (typeof max == 'boolean') {
          floating = max;
          noMax = true;
        }
      }
      if (noMin && noMax) {
        max = 1;
        noMax = false;
      }
      min = +min || 0;
      if (noMax) {
        max = min;
        min = 0;
      } else {
        max = +max || 0;
      }
      if (floating || min % 1 || max % 1) {
        var rand = nativeRandom();
        return nativeMin(min + (rand * (max - min + parseFloat('1e-' + ((rand + '').length - 1)))), max);
      }
      return baseRandom(min, max);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the camel cased string.
     * @example
     *
     * _.camelCase('Foo Bar');
     * // => 'fooBar'
     *
     * _.camelCase('--foo-bar');
     * // => 'fooBar'
     *
     * _.camelCase('__foo_bar__');
     * // => 'fooBar'
     */
    var camelCase = createCompounder(function(result, word, index) {
      word = word.toLowerCase();
      return result + (index ? (word.charAt(0).toUpperCase() + word.slice(1)) : word);
    });

    /**
     * Capitalizes the first character of `string`.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to capitalize.
     * @returns {string} Returns the capitalized string.
     * @example
     *
     * _.capitalize('fred');
     * // => 'Fred'
     */
    function capitalize(string) {
      string = baseToString(string);
      return string && (string.charAt(0).toUpperCase() + string.slice(1));
    }

    /**
     * Deburrs `string` by converting [latin-1 supplementary letters](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
     * to basic latin letters and removing [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to deburr.
     * @returns {string} Returns the deburred string.
     * @example
     *
     * _.deburr('déjà vu');
     * // => 'deja vu'
     */
    function deburr(string) {
      string = baseToString(string);
      return string && string.replace(reLatin1, deburrLetter).replace(reComboMark, '');
    }

    /**
     * Checks if `string` ends with the given target string.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to search.
     * @param {string} [target] The string to search for.
     * @param {number} [position=string.length] The position to search from.
     * @returns {boolean} Returns `true` if `string` ends with `target`, else `false`.
     * @example
     *
     * _.endsWith('abc', 'c');
     * // => true
     *
     * _.endsWith('abc', 'b');
     * // => false
     *
     * _.endsWith('abc', 'b', 2);
     * // => true
     */
    function endsWith(string, target, position) {
      string = baseToString(string);
      target = (target + '');

      var length = string.length;
      position = position === undefined
        ? length
        : nativeMin(position < 0 ? 0 : (+position || 0), length);

      position -= target.length;
      return position >= 0 && string.indexOf(target, position) == position;
    }

    /**
     * Converts the characters "&", "<", ">", '"', "'", and "\`", in `string` to
     * their corresponding HTML entities.
     *
     * **Note:** No other characters are escaped. To escape additional characters
     * use a third-party library like [_he_](https://mths.be/he).
     *
     * Though the ">" character is escaped for symmetry, characters like
     * ">" and "/" don't need escaping in HTML and have no special meaning
     * unless they're part of a tag or unquoted attribute value.
     * See [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
     * (under "semi-related fun fact") for more details.
     *
     * Backticks are escaped because in Internet Explorer < 9, they can break out
     * of attribute values or HTML comments. See [#59](https://html5sec.org/#59),
     * [#102](https://html5sec.org/#102), [#108](https://html5sec.org/#108), and
     * [#133](https://html5sec.org/#133) of the [HTML5 Security Cheatsheet](https://html5sec.org/)
     * for more details.
     *
     * When working with HTML you should always [quote attribute values](http://wonko.com/post/html-escaping)
     * to reduce XSS vectors.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to escape.
     * @returns {string} Returns the escaped string.
     * @example
     *
     * _.escape('fred, barney, & pebbles');
     * // => 'fred, barney, &amp; pebbles'
     */
    function escape(string) {
      // Reset `lastIndex` because in IE < 9 `String#replace` does not.
      string = baseToString(string);
      return (string && reHasUnescapedHtml.test(string))
        ? string.replace(reUnescapedHtml, escapeHtmlChar)
        : string;
    }

    /**
     * Escapes the `RegExp` special characters "\", "/", "^", "$", ".", "|", "?",
     * "*", "+", "(", ")", "[", "]", "{" and "}" in `string`.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to escape.
     * @returns {string} Returns the escaped string.
     * @example
     *
     * _.escapeRegExp('[lodash](https://lodash.com/)');
     * // => '\[lodash\]\(https:\/\/lodash\.com\/\)'
     */
    function escapeRegExp(string) {
      string = baseToString(string);
      return (string && reHasRegExpChars.test(string))
        ? string.replace(reRegExpChars, escapeRegExpChar)
        : (string || '(?:)');
    }

    /**
     * Converts `string` to [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the kebab cased string.
     * @example
     *
     * _.kebabCase('Foo Bar');
     * // => 'foo-bar'
     *
     * _.kebabCase('fooBar');
     * // => 'foo-bar'
     *
     * _.kebabCase('__foo_bar__');
     * // => 'foo-bar'
     */
    var kebabCase = createCompounder(function(result, word, index) {
      return result + (index ? '-' : '') + word.toLowerCase();
    });

    /**
     * Pads `string` on the left and right sides if it's shorter than `length`.
     * Padding characters are truncated if they can't be evenly divided by `length`.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to pad.
     * @param {number} [length=0] The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padded string.
     * @example
     *
     * _.pad('abc', 8);
     * // => '  abc   '
     *
     * _.pad('abc', 8, '_-');
     * // => '_-abc_-_'
     *
     * _.pad('abc', 3);
     * // => 'abc'
     */
    function pad(string, length, chars) {
      string = baseToString(string);
      length = +length;

      var strLength = string.length;
      if (strLength >= length || !nativeIsFinite(length)) {
        return string;
      }
      var mid = (length - strLength) / 2,
          leftLength = nativeFloor(mid),
          rightLength = nativeCeil(mid);

      chars = createPadding('', rightLength, chars);
      return chars.slice(0, leftLength) + string + chars;
    }

    /**
     * Pads `string` on the left side if it's shorter than `length`. Padding
     * characters are truncated if they exceed `length`.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to pad.
     * @param {number} [length=0] The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padded string.
     * @example
     *
     * _.padLeft('abc', 6);
     * // => '   abc'
     *
     * _.padLeft('abc', 6, '_-');
     * // => '_-_abc'
     *
     * _.padLeft('abc', 3);
     * // => 'abc'
     */
    var padLeft = createPadDir();

    /**
     * Pads `string` on the right side if it's shorter than `length`. Padding
     * characters are truncated if they exceed `length`.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to pad.
     * @param {number} [length=0] The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padded string.
     * @example
     *
     * _.padRight('abc', 6);
     * // => 'abc   '
     *
     * _.padRight('abc', 6, '_-');
     * // => 'abc_-_'
     *
     * _.padRight('abc', 3);
     * // => 'abc'
     */
    var padRight = createPadDir(true);

    /**
     * Converts `string` to an integer of the specified radix. If `radix` is
     * `undefined` or `0`, a `radix` of `10` is used unless `value` is a hexadecimal,
     * in which case a `radix` of `16` is used.
     *
     * **Note:** This method aligns with the [ES5 implementation](https://es5.github.io/#E)
     * of `parseInt`.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} string The string to convert.
     * @param {number} [radix] The radix to interpret `value` by.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {number} Returns the converted integer.
     * @example
     *
     * _.parseInt('08');
     * // => 8
     *
     * _.map(['6', '08', '10'], _.parseInt);
     * // => [6, 8, 10]
     */
    function parseInt(string, radix, guard) {
      // Firefox < 21 and Opera < 15 follow ES3 for `parseInt`.
      // Chrome fails to trim leading <BOM> whitespace characters.
      // See https://code.google.com/p/v8/issues/detail?id=3109 for more details.
      if (guard ? isIterateeCall(string, radix, guard) : radix == null) {
        radix = 0;
      } else if (radix) {
        radix = +radix;
      }
      string = trim(string);
      return nativeParseInt(string, radix || (reHasHexPrefix.test(string) ? 16 : 10));
    }

    /**
     * Repeats the given string `n` times.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to repeat.
     * @param {number} [n=0] The number of times to repeat the string.
     * @returns {string} Returns the repeated string.
     * @example
     *
     * _.repeat('*', 3);
     * // => '***'
     *
     * _.repeat('abc', 2);
     * // => 'abcabc'
     *
     * _.repeat('abc', 0);
     * // => ''
     */
    function repeat(string, n) {
      var result = '';
      string = baseToString(string);
      n = +n;
      if (n < 1 || !string || !nativeIsFinite(n)) {
        return result;
      }
      // Leverage the exponentiation by squaring algorithm for a faster repeat.
      // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
      do {
        if (n % 2) {
          result += string;
        }
        n = nativeFloor(n / 2);
        string += string;
      } while (n);

      return result;
    }

    /**
     * Converts `string` to [snake case](https://en.wikipedia.org/wiki/Snake_case).
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the snake cased string.
     * @example
     *
     * _.snakeCase('Foo Bar');
     * // => 'foo_bar'
     *
     * _.snakeCase('fooBar');
     * // => 'foo_bar'
     *
     * _.snakeCase('--foo-bar');
     * // => 'foo_bar'
     */
    var snakeCase = createCompounder(function(result, word, index) {
      return result + (index ? '_' : '') + word.toLowerCase();
    });

    /**
     * Converts `string` to [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the start cased string.
     * @example
     *
     * _.startCase('--foo-bar');
     * // => 'Foo Bar'
     *
     * _.startCase('fooBar');
     * // => 'Foo Bar'
     *
     * _.startCase('__foo_bar__');
     * // => 'Foo Bar'
     */
    var startCase = createCompounder(function(result, word, index) {
      return result + (index ? ' ' : '') + (word.charAt(0).toUpperCase() + word.slice(1));
    });

    /**
     * Checks if `string` starts with the given target string.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to search.
     * @param {string} [target] The string to search for.
     * @param {number} [position=0] The position to search from.
     * @returns {boolean} Returns `true` if `string` starts with `target`, else `false`.
     * @example
     *
     * _.startsWith('abc', 'a');
     * // => true
     *
     * _.startsWith('abc', 'b');
     * // => false
     *
     * _.startsWith('abc', 'b', 1);
     * // => true
     */
    function startsWith(string, target, position) {
      string = baseToString(string);
      position = position == null
        ? 0
        : nativeMin(position < 0 ? 0 : (+position || 0), string.length);

      return string.lastIndexOf(target, position) == position;
    }

    /**
     * Creates a compiled template function that can interpolate data properties
     * in "interpolate" delimiters, HTML-escape interpolated data properties in
     * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
     * properties may be accessed as free variables in the template. If a setting
     * object is provided it takes precedence over `_.templateSettings` values.
     *
     * **Note:** In the development build `_.template` utilizes
     * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
     * for easier debugging.
     *
     * For more information on precompiling templates see
     * [lodash's custom builds documentation](https://lodash.com/custom-builds).
     *
     * For more information on Chrome extension sandboxes see
     * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The template string.
     * @param {Object} [options] The options object.
     * @param {RegExp} [options.escape] The HTML "escape" delimiter.
     * @param {RegExp} [options.evaluate] The "evaluate" delimiter.
     * @param {Object} [options.imports] An object to import into the template as free variables.
     * @param {RegExp} [options.interpolate] The "interpolate" delimiter.
     * @param {string} [options.sourceURL] The sourceURL of the template's compiled source.
     * @param {string} [options.variable] The data object variable name.
     * @param- {Object} [otherOptions] Enables the legacy `options` param signature.
     * @returns {Function} Returns the compiled template function.
     * @example
     *
     * // using the "interpolate" delimiter to create a compiled template
     * var compiled = _.template('hello <%= user %>!');
     * compiled({ 'user': 'fred' });
     * // => 'hello fred!'
     *
     * // using the HTML "escape" delimiter to escape data property values
     * var compiled = _.template('<b><%- value %></b>');
     * compiled({ 'value': '<script>' });
     * // => '<b>&lt;script&gt;</b>'
     *
     * // using the "evaluate" delimiter to execute JavaScript and generate HTML
     * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
     * compiled({ 'users': ['fred', 'barney'] });
     * // => '<li>fred</li><li>barney</li>'
     *
     * // using the internal `print` function in "evaluate" delimiters
     * var compiled = _.template('<% print("hello " + user); %>!');
     * compiled({ 'user': 'barney' });
     * // => 'hello barney!'
     *
     * // using the ES delimiter as an alternative to the default "interpolate" delimiter
     * var compiled = _.template('hello ${ user }!');
     * compiled({ 'user': 'pebbles' });
     * // => 'hello pebbles!'
     *
     * // using custom template delimiters
     * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
     * var compiled = _.template('hello {{ user }}!');
     * compiled({ 'user': 'mustache' });
     * // => 'hello mustache!'
     *
     * // using backslashes to treat delimiters as plain text
     * var compiled = _.template('<%= "\\<%- value %\\>" %>');
     * compiled({ 'value': 'ignored' });
     * // => '<%- value %>'
     *
     * // using the `imports` option to import `jQuery` as `jq`
     * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
     * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
     * compiled({ 'users': ['fred', 'barney'] });
     * // => '<li>fred</li><li>barney</li>'
     *
     * // using the `sourceURL` option to specify a custom sourceURL for the template
     * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
     * compiled(data);
     * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
     *
     * // using the `variable` option to ensure a with-statement isn't used in the compiled template
     * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
     * compiled.source;
     * // => function(data) {
     * //   var __t, __p = '';
     * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
     * //   return __p;
     * // }
     *
     * // using the `source` property to inline compiled templates for meaningful
     * // line numbers in error messages and a stack trace
     * fs.writeFileSync(path.join(cwd, 'jst.js'), '\
     *   var JST = {\
     *     "main": ' + _.template(mainText).source + '\
     *   };\
     * ');
     */
    function template(string, options, otherOptions) {
      // Based on John Resig's `tmpl` implementation (http://ejohn.org/blog/javascript-micro-templating/)
      // and Laura Doktorova's doT.js (https://github.com/olado/doT).
      var settings = lodash.templateSettings;

      if (otherOptions && isIterateeCall(string, options, otherOptions)) {
        options = otherOptions = undefined;
      }
      string = baseToString(string);
      options = assignWith(baseAssign({}, otherOptions || options), settings, assignOwnDefaults);

      var imports = assignWith(baseAssign({}, options.imports), settings.imports, assignOwnDefaults),
          importsKeys = keys(imports),
          importsValues = baseValues(imports, importsKeys);

      var isEscaping,
          isEvaluating,
          index = 0,
          interpolate = options.interpolate || reNoMatch,
          source = "__p += '";

      // Compile the regexp to match each delimiter.
      var reDelimiters = RegExp(
        (options.escape || reNoMatch).source + '|' +
        interpolate.source + '|' +
        (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
        (options.evaluate || reNoMatch).source + '|$'
      , 'g');

      // Use a sourceURL for easier debugging.
      var sourceURL = '//# sourceURL=' +
        ('sourceURL' in options
          ? options.sourceURL
          : ('lodash.templateSources[' + (++templateCounter) + ']')
        ) + '\n';

      string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
        interpolateValue || (interpolateValue = esTemplateValue);

        // Escape characters that can't be included in string literals.
        source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);

        // Replace delimiters with snippets.
        if (escapeValue) {
          isEscaping = true;
          source += "' +\n__e(" + escapeValue + ") +\n'";
        }
        if (evaluateValue) {
          isEvaluating = true;
          source += "';\n" + evaluateValue + ";\n__p += '";
        }
        if (interpolateValue) {
          source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
        }
        index = offset + match.length;

        // The JS engine embedded in Adobe products requires returning the `match`
        // string in order to produce the correct `offset` value.
        return match;
      });

      source += "';\n";

      // If `variable` is not specified wrap a with-statement around the generated
      // code to add the data object to the top of the scope chain.
      var variable = options.variable;
      if (!variable) {
        source = 'with (obj) {\n' + source + '\n}\n';
      }
      // Cleanup code by stripping empty strings.
      source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
        .replace(reEmptyStringMiddle, '$1')
        .replace(reEmptyStringTrailing, '$1;');

      // Frame code as the function body.
      source = 'function(' + (variable || 'obj') + ') {\n' +
        (variable
          ? ''
          : 'obj || (obj = {});\n'
        ) +
        "var __t, __p = ''" +
        (isEscaping
           ? ', __e = _.escape'
           : ''
        ) +
        (isEvaluating
          ? ', __j = Array.prototype.join;\n' +
            "function print() { __p += __j.call(arguments, '') }\n"
          : ';\n'
        ) +
        source +
        'return __p\n}';

      var result = attempt(function() {
        return Function(importsKeys, sourceURL + 'return ' + source).apply(undefined, importsValues);
      });

      // Provide the compiled function's source by its `toString` method or
      // the `source` property as a convenience for inlining compiled templates.
      result.source = source;
      if (isError(result)) {
        throw result;
      }
      return result;
    }

    /**
     * Removes leading and trailing whitespace or specified characters from `string`.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to trim.
     * @param {string} [chars=whitespace] The characters to trim.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {string} Returns the trimmed string.
     * @example
     *
     * _.trim('  abc  ');
     * // => 'abc'
     *
     * _.trim('-_-abc-_-', '_-');
     * // => 'abc'
     *
     * _.map(['  foo  ', '  bar  '], _.trim);
     * // => ['foo', 'bar']
     */
    function trim(string, chars, guard) {
      var value = string;
      string = baseToString(string);
      if (!string) {
        return string;
      }
      if (guard ? isIterateeCall(value, chars, guard) : chars == null) {
        return string.slice(trimmedLeftIndex(string), trimmedRightIndex(string) + 1);
      }
      chars = (chars + '');
      return string.slice(charsLeftIndex(string, chars), charsRightIndex(string, chars) + 1);
    }

    /**
     * Removes leading whitespace or specified characters from `string`.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to trim.
     * @param {string} [chars=whitespace] The characters to trim.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {string} Returns the trimmed string.
     * @example
     *
     * _.trimLeft('  abc  ');
     * // => 'abc  '
     *
     * _.trimLeft('-_-abc-_-', '_-');
     * // => 'abc-_-'
     */
    function trimLeft(string, chars, guard) {
      var value = string;
      string = baseToString(string);
      if (!string) {
        return string;
      }
      if (guard ? isIterateeCall(value, chars, guard) : chars == null) {
        return string.slice(trimmedLeftIndex(string));
      }
      return string.slice(charsLeftIndex(string, (chars + '')));
    }

    /**
     * Removes trailing whitespace or specified characters from `string`.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to trim.
     * @param {string} [chars=whitespace] The characters to trim.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {string} Returns the trimmed string.
     * @example
     *
     * _.trimRight('  abc  ');
     * // => '  abc'
     *
     * _.trimRight('-_-abc-_-', '_-');
     * // => '-_-abc'
     */
    function trimRight(string, chars, guard) {
      var value = string;
      string = baseToString(string);
      if (!string) {
        return string;
      }
      if (guard ? isIterateeCall(value, chars, guard) : chars == null) {
        return string.slice(0, trimmedRightIndex(string) + 1);
      }
      return string.slice(0, charsRightIndex(string, (chars + '')) + 1);
    }

    /**
     * Truncates `string` if it's longer than the given maximum string length.
     * The last characters of the truncated string are replaced with the omission
     * string which defaults to "...".
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to truncate.
     * @param {Object|number} [options] The options object or maximum string length.
     * @param {number} [options.length=30] The maximum string length.
     * @param {string} [options.omission='...'] The string to indicate text is omitted.
     * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {string} Returns the truncated string.
     * @example
     *
     * _.trunc('hi-diddly-ho there, neighborino');
     * // => 'hi-diddly-ho there, neighbo...'
     *
     * _.trunc('hi-diddly-ho there, neighborino', 24);
     * // => 'hi-diddly-ho there, n...'
     *
     * _.trunc('hi-diddly-ho there, neighborino', {
     *   'length': 24,
     *   'separator': ' '
     * });
     * // => 'hi-diddly-ho there,...'
     *
     * _.trunc('hi-diddly-ho there, neighborino', {
     *   'length': 24,
     *   'separator': /,? +/
     * });
     * // => 'hi-diddly-ho there...'
     *
     * _.trunc('hi-diddly-ho there, neighborino', {
     *   'omission': ' [...]'
     * });
     * // => 'hi-diddly-ho there, neig [...]'
     */
    function trunc(string, options, guard) {
      if (guard && isIterateeCall(string, options, guard)) {
        options = undefined;
      }
      var length = DEFAULT_TRUNC_LENGTH,
          omission = DEFAULT_TRUNC_OMISSION;

      if (options != null) {
        if (isObject(options)) {
          var separator = 'separator' in options ? options.separator : separator;
          length = 'length' in options ? (+options.length || 0) : length;
          omission = 'omission' in options ? baseToString(options.omission) : omission;
        } else {
          length = +options || 0;
        }
      }
      string = baseToString(string);
      if (length >= string.length) {
        return string;
      }
      var end = length - omission.length;
      if (end < 1) {
        return omission;
      }
      var result = string.slice(0, end);
      if (separator == null) {
        return result + omission;
      }
      if (isRegExp(separator)) {
        if (string.slice(end).search(separator)) {
          var match,
              newEnd,
              substring = string.slice(0, end);

          if (!separator.global) {
            separator = RegExp(separator.source, (reFlags.exec(separator) || '') + 'g');
          }
          separator.lastIndex = 0;
          while ((match = separator.exec(substring))) {
            newEnd = match.index;
          }
          result = result.slice(0, newEnd == null ? end : newEnd);
        }
      } else if (string.indexOf(separator, end) != end) {
        var index = result.lastIndexOf(separator);
        if (index > -1) {
          result = result.slice(0, index);
        }
      }
      return result + omission;
    }

    /**
     * The inverse of `_.escape`; this method converts the HTML entities
     * `&amp;`, `&lt;`, `&gt;`, `&quot;`, `&#39;`, and `&#96;` in `string` to their
     * corresponding characters.
     *
     * **Note:** No other HTML entities are unescaped. To unescape additional HTML
     * entities use a third-party library like [_he_](https://mths.be/he).
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to unescape.
     * @returns {string} Returns the unescaped string.
     * @example
     *
     * _.unescape('fred, barney, &amp; pebbles');
     * // => 'fred, barney, & pebbles'
     */
    function unescape(string) {
      string = baseToString(string);
      return (string && reHasEscapedHtml.test(string))
        ? string.replace(reEscapedHtml, unescapeHtmlChar)
        : string;
    }

    /**
     * Splits `string` into an array of its words.
     *
     * @static
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to inspect.
     * @param {RegExp|string} [pattern] The pattern to match words.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Array} Returns the words of `string`.
     * @example
     *
     * _.words('fred, barney, & pebbles');
     * // => ['fred', 'barney', 'pebbles']
     *
     * _.words('fred, barney, & pebbles', /[^, ]+/g);
     * // => ['fred', 'barney', '&', 'pebbles']
     */
    function words(string, pattern, guard) {
      if (guard && isIterateeCall(string, pattern, guard)) {
        pattern = undefined;
      }
      string = baseToString(string);
      return string.match(pattern || reWords) || [];
    }

    /*------------------------------------------------------------------------*/

    /**
     * Attempts to invoke `func`, returning either the result or the caught error
     * object. Any additional arguments are provided to `func` when it is invoked.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {Function} func The function to attempt.
     * @returns {*} Returns the `func` result or error object.
     * @example
     *
     * // avoid throwing errors for invalid selectors
     * var elements = _.attempt(function(selector) {
     *   return document.querySelectorAll(selector);
     * }, '>_>');
     *
     * if (_.isError(elements)) {
     *   elements = [];
     * }
     */
    var attempt = restParam(function(func, args) {
      try {
        return func.apply(undefined, args);
      } catch(e) {
        return isError(e) ? e : new Error(e);
      }
    });

    /**
     * Creates a function that invokes `func` with the `this` binding of `thisArg`
     * and arguments of the created function. If `func` is a property name the
     * created callback returns the property value for a given element. If `func`
     * is an object the created callback returns `true` for elements that contain
     * the equivalent object properties, otherwise it returns `false`.
     *
     * @static
     * @memberOf _
     * @alias iteratee
     * @category Utility
     * @param {*} [func=_.identity] The value to convert to a callback.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
     * @returns {Function} Returns the callback.
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36 },
     *   { 'user': 'fred',   'age': 40 }
     * ];
     *
     * // wrap to create custom callback shorthands
     * _.callback = _.wrap(_.callback, function(callback, func, thisArg) {
     *   var match = /^(.+?)__([gl]t)(.+)$/.exec(func);
     *   if (!match) {
     *     return callback(func, thisArg);
     *   }
     *   return function(object) {
     *     return match[2] == 'gt'
     *       ? object[match[1]] > match[3]
     *       : object[match[1]] < match[3];
     *   };
     * });
     *
     * _.filter(users, 'age__gt36');
     * // => [{ 'user': 'fred', 'age': 40 }]
     */
    function callback(func, thisArg, guard) {
      if (guard && isIterateeCall(func, thisArg, guard)) {
        thisArg = undefined;
      }
      return isObjectLike(func)
        ? matches(func)
        : baseCallback(func, thisArg);
    }

    /**
     * Creates a function that returns `value`.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {*} value The value to return from the new function.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var object = { 'user': 'fred' };
     * var getter = _.constant(object);
     *
     * getter() === object;
     * // => true
     */
    function constant(value) {
      return function() {
        return value;
      };
    }

    /**
     * This method returns the first argument provided to it.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {*} value Any value.
     * @returns {*} Returns `value`.
     * @example
     *
     * var object = { 'user': 'fred' };
     *
     * _.identity(object) === object;
     * // => true
     */
    function identity(value) {
      return value;
    }

    /**
     * Creates a function that performs a deep comparison between a given object
     * and `source`, returning `true` if the given object has equivalent property
     * values, else `false`.
     *
     * **Note:** This method supports comparing arrays, booleans, `Date` objects,
     * numbers, `Object` objects, regexes, and strings. Objects are compared by
     * their own, not inherited, enumerable properties. For comparing a single
     * own or inherited property value see `_.matchesProperty`.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {Object} source The object of property values to match.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': true },
     *   { 'user': 'fred',   'age': 40, 'active': false }
     * ];
     *
     * _.filter(users, _.matches({ 'age': 40, 'active': false }));
     * // => [{ 'user': 'fred', 'age': 40, 'active': false }]
     */
    function matches(source) {
      return baseMatches(baseClone(source, true));
    }

    /**
     * Creates a function that compares the property value of `path` on a given
     * object to `value`.
     *
     * **Note:** This method supports comparing arrays, booleans, `Date` objects,
     * numbers, `Object` objects, regexes, and strings. Objects are compared by
     * their own, not inherited, enumerable properties.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {Array|string} path The path of the property to get.
     * @param {*} srcValue The value to match.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var users = [
     *   { 'user': 'barney' },
     *   { 'user': 'fred' }
     * ];
     *
     * _.find(users, _.matchesProperty('user', 'fred'));
     * // => { 'user': 'fred' }
     */
    function matchesProperty(path, srcValue) {
      return baseMatchesProperty(path, baseClone(srcValue, true));
    }

    /**
     * Creates a function that invokes the method at `path` on a given object.
     * Any additional arguments are provided to the invoked method.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {Array|string} path The path of the method to invoke.
     * @param {...*} [args] The arguments to invoke the method with.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var objects = [
     *   { 'a': { 'b': { 'c': _.constant(2) } } },
     *   { 'a': { 'b': { 'c': _.constant(1) } } }
     * ];
     *
     * _.map(objects, _.method('a.b.c'));
     * // => [2, 1]
     *
     * _.invoke(_.sortBy(objects, _.method(['a', 'b', 'c'])), 'a.b.c');
     * // => [1, 2]
     */
    var method = restParam(function(path, args) {
      return function(object) {
        return invokePath(object, path, args);
      };
    });

    /**
     * The opposite of `_.method`; this method creates a function that invokes
     * the method at a given path on `object`. Any additional arguments are
     * provided to the invoked method.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {Object} object The object to query.
     * @param {...*} [args] The arguments to invoke the method with.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var array = _.times(3, _.constant),
     *     object = { 'a': array, 'b': array, 'c': array };
     *
     * _.map(['a[2]', 'c[0]'], _.methodOf(object));
     * // => [2, 0]
     *
     * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
     * // => [2, 0]
     */
    var methodOf = restParam(function(object, args) {
      return function(path) {
        return invokePath(object, path, args);
      };
    });

    /**
     * Adds all own enumerable function properties of a source object to the
     * destination object. If `object` is a function then methods are added to
     * its prototype as well.
     *
     * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
     * avoid conflicts caused by modifying the original.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {Function|Object} [object=lodash] The destination object.
     * @param {Object} source The object of functions to add.
     * @param {Object} [options] The options object.
     * @param {boolean} [options.chain=true] Specify whether the functions added
     *  are chainable.
     * @returns {Function|Object} Returns `object`.
     * @example
     *
     * function vowels(string) {
     *   return _.filter(string, function(v) {
     *     return /[aeiou]/i.test(v);
     *   });
     * }
     *
     * _.mixin({ 'vowels': vowels });
     * _.vowels('fred');
     * // => ['e']
     *
     * _('fred').vowels().value();
     * // => ['e']
     *
     * _.mixin({ 'vowels': vowels }, { 'chain': false });
     * _('fred').vowels();
     * // => ['e']
     */
    function mixin(object, source, options) {
      if (options == null) {
        var isObj = isObject(source),
            props = isObj ? keys(source) : undefined,
            methodNames = (props && props.length) ? baseFunctions(source, props) : undefined;

        if (!(methodNames ? methodNames.length : isObj)) {
          methodNames = false;
          options = source;
          source = object;
          object = this;
        }
      }
      if (!methodNames) {
        methodNames = baseFunctions(source, keys(source));
      }
      var chain = true,
          index = -1,
          isFunc = isFunction(object),
          length = methodNames.length;

      if (options === false) {
        chain = false;
      } else if (isObject(options) && 'chain' in options) {
        chain = options.chain;
      }
      while (++index < length) {
        var methodName = methodNames[index],
            func = source[methodName];

        object[methodName] = func;
        if (isFunc) {
          object.prototype[methodName] = (function(func) {
            return function() {
              var chainAll = this.__chain__;
              if (chain || chainAll) {
                var result = object(this.__wrapped__),
                    actions = result.__actions__ = arrayCopy(this.__actions__);

                actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
                result.__chain__ = chainAll;
                return result;
              }
              return func.apply(object, arrayPush([this.value()], arguments));
            };
          }(func));
        }
      }
      return object;
    }

    /**
     * Reverts the `_` variable to its previous value and returns a reference to
     * the `lodash` function.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @returns {Function} Returns the `lodash` function.
     * @example
     *
     * var lodash = _.noConflict();
     */
    function noConflict() {
      root._ = oldDash;
      return this;
    }

    /**
     * A no-operation function that returns `undefined` regardless of the
     * arguments it receives.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @example
     *
     * var object = { 'user': 'fred' };
     *
     * _.noop(object) === undefined;
     * // => true
     */
    function noop() {
      // No operation performed.
    }

    /**
     * Creates a function that returns the property value at `path` on a
     * given object.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {Array|string} path The path of the property to get.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var objects = [
     *   { 'a': { 'b': { 'c': 2 } } },
     *   { 'a': { 'b': { 'c': 1 } } }
     * ];
     *
     * _.map(objects, _.property('a.b.c'));
     * // => [2, 1]
     *
     * _.pluck(_.sortBy(objects, _.property(['a', 'b', 'c'])), 'a.b.c');
     * // => [1, 2]
     */
    function property(path) {
      return isKey(path) ? baseProperty(path) : basePropertyDeep(path);
    }

    /**
     * The opposite of `_.property`; this method creates a function that returns
     * the property value at a given path on `object`.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {Object} object The object to query.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var array = [0, 1, 2],
     *     object = { 'a': array, 'b': array, 'c': array };
     *
     * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
     * // => [2, 0]
     *
     * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
     * // => [2, 0]
     */
    function propertyOf(object) {
      return function(path) {
        return baseGet(object, toPath(path), path + '');
      };
    }

    /**
     * Creates an array of numbers (positive and/or negative) progressing from
     * `start` up to, but not including, `end`. If `end` is not specified it is
     * set to `start` with `start` then set to `0`. If `end` is less than `start`
     * a zero-length range is created unless a negative `step` is specified.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {number} [start=0] The start of the range.
     * @param {number} end The end of the range.
     * @param {number} [step=1] The value to increment or decrement by.
     * @returns {Array} Returns the new array of numbers.
     * @example
     *
     * _.range(4);
     * // => [0, 1, 2, 3]
     *
     * _.range(1, 5);
     * // => [1, 2, 3, 4]
     *
     * _.range(0, 20, 5);
     * // => [0, 5, 10, 15]
     *
     * _.range(0, -4, -1);
     * // => [0, -1, -2, -3]
     *
     * _.range(1, 4, 0);
     * // => [1, 1, 1]
     *
     * _.range(0);
     * // => []
     */
    function range(start, end, step) {
      if (step && isIterateeCall(start, end, step)) {
        end = step = undefined;
      }
      start = +start || 0;
      step = step == null ? 1 : (+step || 0);

      if (end == null) {
        end = start;
        start = 0;
      } else {
        end = +end || 0;
      }
      // Use `Array(length)` so engines like Chakra and V8 avoid slower modes.
      // See https://youtu.be/XAqIpGU8ZZk#t=17m25s for more details.
      var index = -1,
          length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
          result = Array(length);

      while (++index < length) {
        result[index] = start;
        start += step;
      }
      return result;
    }

    /**
     * Invokes the iteratee function `n` times, returning an array of the results
     * of each invocation. The `iteratee` is bound to `thisArg` and invoked with
     * one argument; (index).
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {number} n The number of times to invoke `iteratee`.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {Array} Returns the array of results.
     * @example
     *
     * var diceRolls = _.times(3, _.partial(_.random, 1, 6, false));
     * // => [3, 6, 4]
     *
     * _.times(3, function(n) {
     *   mage.castSpell(n);
     * });
     * // => invokes `mage.castSpell(n)` three times with `n` of `0`, `1`, and `2`
     *
     * _.times(3, function(n) {
     *   this.cast(n);
     * }, mage);
     * // => also invokes `mage.castSpell(n)` three times
     */
    function times(n, iteratee, thisArg) {
      n = nativeFloor(n);

      // Exit early to avoid a JSC JIT bug in Safari 8
      // where `Array(0)` is treated as `Array(1)`.
      if (n < 1 || !nativeIsFinite(n)) {
        return [];
      }
      var index = -1,
          result = Array(nativeMin(n, MAX_ARRAY_LENGTH));

      iteratee = bindCallback(iteratee, thisArg, 1);
      while (++index < n) {
        if (index < MAX_ARRAY_LENGTH) {
          result[index] = iteratee(index);
        } else {
          iteratee(index);
        }
      }
      return result;
    }

    /**
     * Generates a unique ID. If `prefix` is provided the ID is appended to it.
     *
     * @static
     * @memberOf _
     * @category Utility
     * @param {string} [prefix] The value to prefix the ID with.
     * @returns {string} Returns the unique ID.
     * @example
     *
     * _.uniqueId('contact_');
     * // => 'contact_104'
     *
     * _.uniqueId();
     * // => '105'
     */
    function uniqueId(prefix) {
      var id = ++idCounter;
      return baseToString(prefix) + id;
    }

    /*------------------------------------------------------------------------*/

    /**
     * Adds two numbers.
     *
     * @static
     * @memberOf _
     * @category Math
     * @param {number} augend The first number to add.
     * @param {number} addend The second number to add.
     * @returns {number} Returns the sum.
     * @example
     *
     * _.add(6, 4);
     * // => 10
     */
    function add(augend, addend) {
      return (+augend || 0) + (+addend || 0);
    }

    /**
     * Calculates `n` rounded up to `precision`.
     *
     * @static
     * @memberOf _
     * @category Math
     * @param {number} n The number to round up.
     * @param {number} [precision=0] The precision to round up to.
     * @returns {number} Returns the rounded up number.
     * @example
     *
     * _.ceil(4.006);
     * // => 5
     *
     * _.ceil(6.004, 2);
     * // => 6.01
     *
     * _.ceil(6040, -2);
     * // => 6100
     */
    var ceil = createRound('ceil');

    /**
     * Calculates `n` rounded down to `precision`.
     *
     * @static
     * @memberOf _
     * @category Math
     * @param {number} n The number to round down.
     * @param {number} [precision=0] The precision to round down to.
     * @returns {number} Returns the rounded down number.
     * @example
     *
     * _.floor(4.006);
     * // => 4
     *
     * _.floor(0.046, 2);
     * // => 0.04
     *
     * _.floor(4060, -2);
     * // => 4000
     */
    var floor = createRound('floor');

    /**
     * Gets the maximum value of `collection`. If `collection` is empty or falsey
     * `-Infinity` is returned. If an iteratee function is provided it is invoked
     * for each value in `collection` to generate the criterion by which the value
     * is ranked. The `iteratee` is bound to `thisArg` and invoked with three
     * arguments: (value, index, collection).
     *
     * If a property name is provided for `iteratee` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `iteratee` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Math
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [iteratee] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {*} Returns the maximum value.
     * @example
     *
     * _.max([4, 2, 8, 6]);
     * // => 8
     *
     * _.max([]);
     * // => -Infinity
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36 },
     *   { 'user': 'fred',   'age': 40 }
     * ];
     *
     * _.max(users, function(chr) {
     *   return chr.age;
     * });
     * // => { 'user': 'fred', 'age': 40 }
     *
     * // using the `_.property` callback shorthand
     * _.max(users, 'age');
     * // => { 'user': 'fred', 'age': 40 }
     */
    var max = createExtremum(gt, NEGATIVE_INFINITY);

    /**
     * Gets the minimum value of `collection`. If `collection` is empty or falsey
     * `Infinity` is returned. If an iteratee function is provided it is invoked
     * for each value in `collection` to generate the criterion by which the value
     * is ranked. The `iteratee` is bound to `thisArg` and invoked with three
     * arguments: (value, index, collection).
     *
     * If a property name is provided for `iteratee` the created `_.property`
     * style callback returns the property value of the given element.
     *
     * If a value is also provided for `thisArg` the created `_.matchesProperty`
     * style callback returns `true` for elements that have a matching property
     * value, else `false`.
     *
     * If an object is provided for `iteratee` the created `_.matches` style
     * callback returns `true` for elements that have the properties of the given
     * object, else `false`.
     *
     * @static
     * @memberOf _
     * @category Math
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [iteratee] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {*} Returns the minimum value.
     * @example
     *
     * _.min([4, 2, 8, 6]);
     * // => 2
     *
     * _.min([]);
     * // => Infinity
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36 },
     *   { 'user': 'fred',   'age': 40 }
     * ];
     *
     * _.min(users, function(chr) {
     *   return chr.age;
     * });
     * // => { 'user': 'barney', 'age': 36 }
     *
     * // using the `_.property` callback shorthand
     * _.min(users, 'age');
     * // => { 'user': 'barney', 'age': 36 }
     */
    var min = createExtremum(lt, POSITIVE_INFINITY);

    /**
     * Calculates `n` rounded to `precision`.
     *
     * @static
     * @memberOf _
     * @category Math
     * @param {number} n The number to round.
     * @param {number} [precision=0] The precision to round to.
     * @returns {number} Returns the rounded number.
     * @example
     *
     * _.round(4.006);
     * // => 4
     *
     * _.round(4.006, 2);
     * // => 4.01
     *
     * _.round(4060, -2);
     * // => 4100
     */
    var round = createRound('round');

    /**
     * Gets the sum of the values in `collection`.
     *
     * @static
     * @memberOf _
     * @category Math
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [iteratee] The function invoked per iteration.
     * @param {*} [thisArg] The `this` binding of `iteratee`.
     * @returns {number} Returns the sum.
     * @example
     *
     * _.sum([4, 6]);
     * // => 10
     *
     * _.sum({ 'a': 4, 'b': 6 });
     * // => 10
     *
     * var objects = [
     *   { 'n': 4 },
     *   { 'n': 6 }
     * ];
     *
     * _.sum(objects, function(object) {
     *   return object.n;
     * });
     * // => 10
     *
     * // using the `_.property` callback shorthand
     * _.sum(objects, 'n');
     * // => 10
     */
    function sum(collection, iteratee, thisArg) {
      if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
        iteratee = undefined;
      }
      iteratee = getCallback(iteratee, thisArg, 3);
      return iteratee.length == 1
        ? arraySum(isArray(collection) ? collection : toIterable(collection), iteratee)
        : baseSum(collection, iteratee);
    }

    /*------------------------------------------------------------------------*/

    // Ensure wrappers are instances of `baseLodash`.
    lodash.prototype = baseLodash.prototype;

    LodashWrapper.prototype = baseCreate(baseLodash.prototype);
    LodashWrapper.prototype.constructor = LodashWrapper;

    LazyWrapper.prototype = baseCreate(baseLodash.prototype);
    LazyWrapper.prototype.constructor = LazyWrapper;

    // Add functions to the `Map` cache.
    MapCache.prototype['delete'] = mapDelete;
    MapCache.prototype.get = mapGet;
    MapCache.prototype.has = mapHas;
    MapCache.prototype.set = mapSet;

    // Add functions to the `Set` cache.
    SetCache.prototype.push = cachePush;

    // Assign cache to `_.memoize`.
    memoize.Cache = MapCache;

    // Add functions that return wrapped values when chaining.
    lodash.after = after;
    lodash.ary = ary;
    lodash.assign = assign;
    lodash.at = at;
    lodash.before = before;
    lodash.bind = bind;
    lodash.bindAll = bindAll;
    lodash.bindKey = bindKey;
    lodash.callback = callback;
    lodash.chain = chain;
    lodash.chunk = chunk;
    lodash.compact = compact;
    lodash.constant = constant;
    lodash.countBy = countBy;
    lodash.create = create;
    lodash.curry = curry;
    lodash.curryRight = curryRight;
    lodash.debounce = debounce;
    lodash.defaults = defaults;
    lodash.defaultsDeep = defaultsDeep;
    lodash.defer = defer;
    lodash.delay = delay;
    lodash.difference = difference;
    lodash.drop = drop;
    lodash.dropRight = dropRight;
    lodash.dropRightWhile = dropRightWhile;
    lodash.dropWhile = dropWhile;
    lodash.fill = fill;
    lodash.filter = filter;
    lodash.flatten = flatten;
    lodash.flattenDeep = flattenDeep;
    lodash.flow = flow;
    lodash.flowRight = flowRight;
    lodash.forEach = forEach;
    lodash.forEachRight = forEachRight;
    lodash.forIn = forIn;
    lodash.forInRight = forInRight;
    lodash.forOwn = forOwn;
    lodash.forOwnRight = forOwnRight;
    lodash.functions = functions;
    lodash.groupBy = groupBy;
    lodash.indexBy = indexBy;
    lodash.initial = initial;
    lodash.intersection = intersection;
    lodash.invert = invert;
    lodash.invoke = invoke;
    lodash.keys = keys;
    lodash.keysIn = keysIn;
    lodash.map = map;
    lodash.mapKeys = mapKeys;
    lodash.mapValues = mapValues;
    lodash.matches = matches;
    lodash.matchesProperty = matchesProperty;
    lodash.memoize = memoize;
    lodash.merge = merge;
    lodash.method = method;
    lodash.methodOf = methodOf;
    lodash.mixin = mixin;
    lodash.modArgs = modArgs;
    lodash.negate = negate;
    lodash.omit = omit;
    lodash.once = once;
    lodash.pairs = pairs;
    lodash.partial = partial;
    lodash.partialRight = partialRight;
    lodash.partition = partition;
    lodash.pick = pick;
    lodash.pluck = pluck;
    lodash.property = property;
    lodash.propertyOf = propertyOf;
    lodash.pull = pull;
    lodash.pullAt = pullAt;
    lodash.range = range;
    lodash.rearg = rearg;
    lodash.reject = reject;
    lodash.remove = remove;
    lodash.rest = rest;
    lodash.restParam = restParam;
    lodash.set = set;
    lodash.shuffle = shuffle;
    lodash.slice = slice;
    lodash.sortBy = sortBy;
    lodash.sortByAll = sortByAll;
    lodash.sortByOrder = sortByOrder;
    lodash.spread = spread;
    lodash.take = take;
    lodash.takeRight = takeRight;
    lodash.takeRightWhile = takeRightWhile;
    lodash.takeWhile = takeWhile;
    lodash.tap = tap;
    lodash.throttle = throttle;
    lodash.thru = thru;
    lodash.times = times;
    lodash.toArray = toArray;
    lodash.toPlainObject = toPlainObject;
    lodash.transform = transform;
    lodash.union = union;
    lodash.uniq = uniq;
    lodash.unzip = unzip;
    lodash.unzipWith = unzipWith;
    lodash.values = values;
    lodash.valuesIn = valuesIn;
    lodash.where = where;
    lodash.without = without;
    lodash.wrap = wrap;
    lodash.xor = xor;
    lodash.zip = zip;
    lodash.zipObject = zipObject;
    lodash.zipWith = zipWith;

    // Add aliases.
    lodash.backflow = flowRight;
    lodash.collect = map;
    lodash.compose = flowRight;
    lodash.each = forEach;
    lodash.eachRight = forEachRight;
    lodash.extend = assign;
    lodash.iteratee = callback;
    lodash.methods = functions;
    lodash.object = zipObject;
    lodash.select = filter;
    lodash.tail = rest;
    lodash.unique = uniq;

    // Add functions to `lodash.prototype`.
    mixin(lodash, lodash);

    /*------------------------------------------------------------------------*/

    // Add functions that return unwrapped values when chaining.
    lodash.add = add;
    lodash.attempt = attempt;
    lodash.camelCase = camelCase;
    lodash.capitalize = capitalize;
    lodash.ceil = ceil;
    lodash.clone = clone;
    lodash.cloneDeep = cloneDeep;
    lodash.deburr = deburr;
    lodash.endsWith = endsWith;
    lodash.escape = escape;
    lodash.escapeRegExp = escapeRegExp;
    lodash.every = every;
    lodash.find = find;
    lodash.findIndex = findIndex;
    lodash.findKey = findKey;
    lodash.findLast = findLast;
    lodash.findLastIndex = findLastIndex;
    lodash.findLastKey = findLastKey;
    lodash.findWhere = findWhere;
    lodash.first = first;
    lodash.floor = floor;
    lodash.get = get;
    lodash.gt = gt;
    lodash.gte = gte;
    lodash.has = has;
    lodash.identity = identity;
    lodash.includes = includes;
    lodash.indexOf = indexOf;
    lodash.inRange = inRange;
    lodash.isArguments = isArguments;
    lodash.isArray = isArray;
    lodash.isBoolean = isBoolean;
    lodash.isDate = isDate;
    lodash.isElement = isElement;
    lodash.isEmpty = isEmpty;
    lodash.isEqual = isEqual;
    lodash.isError = isError;
    lodash.isFinite = isFinite;
    lodash.isFunction = isFunction;
    lodash.isMatch = isMatch;
    lodash.isNaN = isNaN;
    lodash.isNative = isNative;
    lodash.isNull = isNull;
    lodash.isNumber = isNumber;
    lodash.isObject = isObject;
    lodash.isPlainObject = isPlainObject;
    lodash.isRegExp = isRegExp;
    lodash.isString = isString;
    lodash.isTypedArray = isTypedArray;
    lodash.isUndefined = isUndefined;
    lodash.kebabCase = kebabCase;
    lodash.last = last;
    lodash.lastIndexOf = lastIndexOf;
    lodash.lt = lt;
    lodash.lte = lte;
    lodash.max = max;
    lodash.min = min;
    lodash.noConflict = noConflict;
    lodash.noop = noop;
    lodash.now = now;
    lodash.pad = pad;
    lodash.padLeft = padLeft;
    lodash.padRight = padRight;
    lodash.parseInt = parseInt;
    lodash.random = random;
    lodash.reduce = reduce;
    lodash.reduceRight = reduceRight;
    lodash.repeat = repeat;
    lodash.result = result;
    lodash.round = round;
    lodash.runInContext = runInContext;
    lodash.size = size;
    lodash.snakeCase = snakeCase;
    lodash.some = some;
    lodash.sortedIndex = sortedIndex;
    lodash.sortedLastIndex = sortedLastIndex;
    lodash.startCase = startCase;
    lodash.startsWith = startsWith;
    lodash.sum = sum;
    lodash.template = template;
    lodash.trim = trim;
    lodash.trimLeft = trimLeft;
    lodash.trimRight = trimRight;
    lodash.trunc = trunc;
    lodash.unescape = unescape;
    lodash.uniqueId = uniqueId;
    lodash.words = words;

    // Add aliases.
    lodash.all = every;
    lodash.any = some;
    lodash.contains = includes;
    lodash.eq = isEqual;
    lodash.detect = find;
    lodash.foldl = reduce;
    lodash.foldr = reduceRight;
    lodash.head = first;
    lodash.include = includes;
    lodash.inject = reduce;

    mixin(lodash, (function() {
      var source = {};
      baseForOwn(lodash, function(func, methodName) {
        if (!lodash.prototype[methodName]) {
          source[methodName] = func;
        }
      });
      return source;
    }()), false);

    /*------------------------------------------------------------------------*/

    // Add functions capable of returning wrapped and unwrapped values when chaining.
    lodash.sample = sample;

    lodash.prototype.sample = function(n) {
      if (!this.__chain__ && n == null) {
        return sample(this.value());
      }
      return this.thru(function(value) {
        return sample(value, n);
      });
    };

    /*------------------------------------------------------------------------*/

    /**
     * The semantic version number.
     *
     * @static
     * @memberOf _
     * @type string
     */
    lodash.VERSION = VERSION;

    // Assign default placeholders.
    arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
      lodash[methodName].placeholder = lodash;
    });

    // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
    arrayEach(['drop', 'take'], function(methodName, index) {
      LazyWrapper.prototype[methodName] = function(n) {
        var filtered = this.__filtered__;
        if (filtered && !index) {
          return new LazyWrapper(this);
        }
        n = n == null ? 1 : nativeMax(nativeFloor(n) || 0, 0);

        var result = this.clone();
        if (filtered) {
          result.__takeCount__ = nativeMin(result.__takeCount__, n);
        } else {
          result.__views__.push({ 'size': n, 'type': methodName + (result.__dir__ < 0 ? 'Right' : '') });
        }
        return result;
      };

      LazyWrapper.prototype[methodName + 'Right'] = function(n) {
        return this.reverse()[methodName](n).reverse();
      };
    });

    // Add `LazyWrapper` methods that accept an `iteratee` value.
    arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
      var type = index + 1,
          isFilter = type != LAZY_MAP_FLAG;

      LazyWrapper.prototype[methodName] = function(iteratee, thisArg) {
        var result = this.clone();
        result.__iteratees__.push({ 'iteratee': getCallback(iteratee, thisArg, 1), 'type': type });
        result.__filtered__ = result.__filtered__ || isFilter;
        return result;
      };
    });

    // Add `LazyWrapper` methods for `_.first` and `_.last`.
    arrayEach(['first', 'last'], function(methodName, index) {
      var takeName = 'take' + (index ? 'Right' : '');

      LazyWrapper.prototype[methodName] = function() {
        return this[takeName](1).value()[0];
      };
    });

    // Add `LazyWrapper` methods for `_.initial` and `_.rest`.
    arrayEach(['initial', 'rest'], function(methodName, index) {
      var dropName = 'drop' + (index ? '' : 'Right');

      LazyWrapper.prototype[methodName] = function() {
        return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
      };
    });

    // Add `LazyWrapper` methods for `_.pluck` and `_.where`.
    arrayEach(['pluck', 'where'], function(methodName, index) {
      var operationName = index ? 'filter' : 'map',
          createCallback = index ? baseMatches : property;

      LazyWrapper.prototype[methodName] = function(value) {
        return this[operationName](createCallback(value));
      };
    });

    LazyWrapper.prototype.compact = function() {
      return this.filter(identity);
    };

    LazyWrapper.prototype.reject = function(predicate, thisArg) {
      predicate = getCallback(predicate, thisArg, 1);
      return this.filter(function(value) {
        return !predicate(value);
      });
    };

    LazyWrapper.prototype.slice = function(start, end) {
      start = start == null ? 0 : (+start || 0);

      var result = this;
      if (result.__filtered__ && (start > 0 || end < 0)) {
        return new LazyWrapper(result);
      }
      if (start < 0) {
        result = result.takeRight(-start);
      } else if (start) {
        result = result.drop(start);
      }
      if (end !== undefined) {
        end = (+end || 0);
        result = end < 0 ? result.dropRight(-end) : result.take(end - start);
      }
      return result;
    };

    LazyWrapper.prototype.takeRightWhile = function(predicate, thisArg) {
      return this.reverse().takeWhile(predicate, thisArg).reverse();
    };

    LazyWrapper.prototype.toArray = function() {
      return this.take(POSITIVE_INFINITY);
    };

    // Add `LazyWrapper` methods to `lodash.prototype`.
    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
      var checkIteratee = /^(?:filter|map|reject)|While$/.test(methodName),
          retUnwrapped = /^(?:first|last)$/.test(methodName),
          lodashFunc = lodash[retUnwrapped ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName];

      if (!lodashFunc) {
        return;
      }
      lodash.prototype[methodName] = function() {
        var args = retUnwrapped ? [1] : arguments,
            chainAll = this.__chain__,
            value = this.__wrapped__,
            isHybrid = !!this.__actions__.length,
            isLazy = value instanceof LazyWrapper,
            iteratee = args[0],
            useLazy = isLazy || isArray(value);

        if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
          // Avoid lazy use if the iteratee has a "length" value other than `1`.
          isLazy = useLazy = false;
        }
        var interceptor = function(value) {
          return (retUnwrapped && chainAll)
            ? lodashFunc(value, 1)[0]
            : lodashFunc.apply(undefined, arrayPush([value], args));
        };

        var action = { 'func': thru, 'args': [interceptor], 'thisArg': undefined },
            onlyLazy = isLazy && !isHybrid;

        if (retUnwrapped && !chainAll) {
          if (onlyLazy) {
            value = value.clone();
            value.__actions__.push(action);
            return func.call(value);
          }
          return lodashFunc.call(undefined, this.value())[0];
        }
        if (!retUnwrapped && useLazy) {
          value = onlyLazy ? value : new LazyWrapper(this);
          var result = func.apply(value, args);
          result.__actions__.push(action);
          return new LodashWrapper(result, chainAll);
        }
        return this.thru(interceptor);
      };
    });

    // Add `Array` and `String` methods to `lodash.prototype`.
    arrayEach(['join', 'pop', 'push', 'replace', 'shift', 'sort', 'splice', 'split', 'unshift'], function(methodName) {
      var func = (/^(?:replace|split)$/.test(methodName) ? stringProto : arrayProto)[methodName],
          chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
          retUnwrapped = /^(?:join|pop|replace|shift)$/.test(methodName);

      lodash.prototype[methodName] = function() {
        var args = arguments;
        if (retUnwrapped && !this.__chain__) {
          return func.apply(this.value(), args);
        }
        return this[chainName](function(value) {
          return func.apply(value, args);
        });
      };
    });

    // Map minified function names to their real names.
    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
      var lodashFunc = lodash[methodName];
      if (lodashFunc) {
        var key = lodashFunc.name,
            names = realNames[key] || (realNames[key] = []);

        names.push({ 'name': methodName, 'func': lodashFunc });
      }
    });

    realNames[createHybridWrapper(undefined, BIND_KEY_FLAG).name] = [{ 'name': 'wrapper', 'func': undefined }];

    // Add functions to the lazy wrapper.
    LazyWrapper.prototype.clone = lazyClone;
    LazyWrapper.prototype.reverse = lazyReverse;
    LazyWrapper.prototype.value = lazyValue;

    // Add chaining functions to the `lodash` wrapper.
    lodash.prototype.chain = wrapperChain;
    lodash.prototype.commit = wrapperCommit;
    lodash.prototype.concat = wrapperConcat;
    lodash.prototype.plant = wrapperPlant;
    lodash.prototype.reverse = wrapperReverse;
    lodash.prototype.toString = wrapperToString;
    lodash.prototype.run = lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;

    // Add function aliases to the `lodash` wrapper.
    lodash.prototype.collect = lodash.prototype.map;
    lodash.prototype.head = lodash.prototype.first;
    lodash.prototype.select = lodash.prototype.filter;
    lodash.prototype.tail = lodash.prototype.rest;

    return lodash;
  }

  /*--------------------------------------------------------------------------*/

  // Export lodash.
  var _ = runInContext();

  // Some AMD build optimizers like r.js check for condition patterns like the following:
  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
    // Expose lodash to the global object when an AMD loader is present to avoid
    // errors in cases where lodash is loaded by a script tag and not intended
    // as an AMD module. See http://requirejs.org/docs/errors.html#mismatch for
    // more details.
    root._ = _;

    // Define as an anonymous module so, through path mapping, it can be
    // referenced as the "underscore" module.
    define(function() {
      return _;
    });
  }
  // Check for `exports` after `define` in case a build optimizer adds an `exports` object.
  else if (freeExports && freeModule) {
    // Export for Node.js or RingoJS.
    if (moduleExports) {
      (freeModule.exports = _)._ = _;
    }
    // Export for Rhino with CommonJS support.
    else {
      freeExports._ = _;
    }
  }
  else {
    // Export for a browser or Rhino.
    root._ = _;
  }
}.call(this));

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],2:[function(require,module,exports){
'use strict';
var propIsEnumerable = Object.prototype.propertyIsEnumerable;

function ToObject(val) {
	if (val == null) {
		throw new TypeError('Object.assign cannot be called with null or undefined');
	}

	return Object(val);
}

function ownEnumerableKeys(obj) {
	var keys = Object.getOwnPropertyNames(obj);

	if (Object.getOwnPropertySymbols) {
		keys = keys.concat(Object.getOwnPropertySymbols(obj));
	}

	return keys.filter(function (key) {
		return propIsEnumerable.call(obj, key);
	});
}

module.exports = Object.assign || function (target, source) {
	var from;
	var keys;
	var to = ToObject(target);

	for (var s = 1; s < arguments.length; s++) {
		from = arguments[s];
		keys = ownEnumerableKeys(Object(from));

		for (var i = 0; i < keys.length; i++) {
			to[keys[i]] = from[keys[i]];
		}
	}

	return to;
};

},{}],3:[function(require,module,exports){

/***** xregexp.js *****/

/*!
 * XRegExp v2.0.0
 * (c) 2007-2012 Steven Levithan <http://xregexp.com/>
 * MIT License
 */

/**
 * XRegExp provides augmented, extensible JavaScript regular expressions. You get new syntax,
 * flags, and methods beyond what browsers support natively. XRegExp is also a regex utility belt
 * with tools to make your client-side grepping simpler and more powerful, while freeing you from
 * worrying about pesky cross-browser inconsistencies and the dubious `lastIndex` property. See
 * XRegExp's documentation (http://xregexp.com/) for more details.
 * @module xregexp
 * @requires N/A
 */
var XRegExp;

// Avoid running twice; that would reset tokens and could break references to native globals
XRegExp = XRegExp || (function (undef) {
    "use strict";

/*--------------------------------------
 *  Private variables
 *------------------------------------*/

    var self,
        addToken,
        add,

// Optional features; can be installed and uninstalled
        features = {
            natives: false,
            extensibility: false
        },

// Store native methods to use and restore ("native" is an ES3 reserved keyword)
        nativ = {
            exec: RegExp.prototype.exec,
            test: RegExp.prototype.test,
            match: String.prototype.match,
            replace: String.prototype.replace,
            split: String.prototype.split
        },

// Storage for fixed/extended native methods
        fixed = {},

// Storage for cached regexes
        cache = {},

// Storage for addon tokens
        tokens = [],

// Token scopes
        defaultScope = "default",
        classScope = "class",

// Regexes that match native regex syntax
        nativeTokens = {
            // Any native multicharacter token in default scope (includes octals, excludes character classes)
            "default": /^(?:\\(?:0(?:[0-3][0-7]{0,2}|[4-7][0-7]?)?|[1-9]\d*|x[\dA-Fa-f]{2}|u[\dA-Fa-f]{4}|c[A-Za-z]|[\s\S])|\(\?[:=!]|[?*+]\?|{\d+(?:,\d*)?}\??)/,
            // Any native multicharacter token in character class scope (includes octals)
            "class": /^(?:\\(?:[0-3][0-7]{0,2}|[4-7][0-7]?|x[\dA-Fa-f]{2}|u[\dA-Fa-f]{4}|c[A-Za-z]|[\s\S]))/
        },

// Any backreference in replacement strings
        replacementToken = /\$(?:{([\w$]+)}|(\d\d?|[\s\S]))/g,

// Any character with a later instance in the string
        duplicateFlags = /([\s\S])(?=[\s\S]*\1)/g,

// Any greedy/lazy quantifier
        quantifier = /^(?:[?*+]|{\d+(?:,\d*)?})\??/,

// Check for correct `exec` handling of nonparticipating capturing groups
        compliantExecNpcg = nativ.exec.call(/()??/, "")[1] === undef,

// Check for flag y support (Firefox 3+)
        hasNativeY = RegExp.prototype.sticky !== undef,

// Used to kill infinite recursion during XRegExp construction
        isInsideConstructor = false,

// Storage for known flags, including addon flags
        registeredFlags = "gim" + (hasNativeY ? "y" : "");

/*--------------------------------------
 *  Private helper functions
 *------------------------------------*/

/**
 * Attaches XRegExp.prototype properties and named capture supporting data to a regex object.
 * @private
 * @param {RegExp} regex Regex to augment.
 * @param {Array} captureNames Array with capture names, or null.
 * @param {Boolean} [isNative] Whether the regex was created by `RegExp` rather than `XRegExp`.
 * @returns {RegExp} Augmented regex.
 */
    function augment(regex, captureNames, isNative) {
        var p;
        // Can't auto-inherit these since the XRegExp constructor returns a nonprimitive value
        for (p in self.prototype) {
            if (self.prototype.hasOwnProperty(p)) {
                regex[p] = self.prototype[p];
            }
        }
        regex.xregexp = {captureNames: captureNames, isNative: !!isNative};
        return regex;
    }

/**
 * Returns native `RegExp` flags used by a regex object.
 * @private
 * @param {RegExp} regex Regex to check.
 * @returns {String} Native flags in use.
 */
    function getNativeFlags(regex) {
        //return nativ.exec.call(/\/([a-z]*)$/i, String(regex))[1];
        return (regex.global     ? "g" : "") +
               (regex.ignoreCase ? "i" : "") +
               (regex.multiline  ? "m" : "") +
               (regex.extended   ? "x" : "") + // Proposed for ES6, included in AS3
               (regex.sticky     ? "y" : ""); // Proposed for ES6, included in Firefox 3+
    }

/**
 * Copies a regex object while preserving special properties for named capture and augmenting with
 * `XRegExp.prototype` methods. The copy has a fresh `lastIndex` property (set to zero). Allows
 * adding and removing flags while copying the regex.
 * @private
 * @param {RegExp} regex Regex to copy.
 * @param {String} [addFlags] Flags to be added while copying the regex.
 * @param {String} [removeFlags] Flags to be removed while copying the regex.
 * @returns {RegExp} Copy of the provided regex, possibly with modified flags.
 */
    function copy(regex, addFlags, removeFlags) {
        if (!self.isRegExp(regex)) {
            throw new TypeError("type RegExp expected");
        }
        var flags = nativ.replace.call(getNativeFlags(regex) + (addFlags || ""), duplicateFlags, "");
        if (removeFlags) {
            // Would need to escape `removeFlags` if this was public
            flags = nativ.replace.call(flags, new RegExp("[" + removeFlags + "]+", "g"), "");
        }
        if (regex.xregexp && !regex.xregexp.isNative) {
            // Compiling the current (rather than precompilation) source preserves the effects of nonnative source flags
            regex = augment(self(regex.source, flags),
                            regex.xregexp.captureNames ? regex.xregexp.captureNames.slice(0) : null);
        } else {
            // Augment with `XRegExp.prototype` methods, but use native `RegExp` (avoid searching for special tokens)
            regex = augment(new RegExp(regex.source, flags), null, true);
        }
        return regex;
    }

/*
 * Returns the last index at which a given value can be found in an array, or `-1` if it's not
 * present. The array is searched backwards.
 * @private
 * @param {Array} array Array to search.
 * @param {*} value Value to locate in the array.
 * @returns {Number} Last zero-based index at which the item is found, or -1.
 */
    function lastIndexOf(array, value) {
        var i = array.length;
        if (Array.prototype.lastIndexOf) {
            return array.lastIndexOf(value); // Use the native method if available
        }
        while (i--) {
            if (array[i] === value) {
                return i;
            }
        }
        return -1;
    }

/**
 * Determines whether an object is of the specified type.
 * @private
 * @param {*} value Object to check.
 * @param {String} type Type to check for, in lowercase.
 * @returns {Boolean} Whether the object matches the type.
 */
    function isType(value, type) {
        return Object.prototype.toString.call(value).toLowerCase() === "[object " + type + "]";
    }

/**
 * Prepares an options object from the given value.
 * @private
 * @param {String|Object} value Value to convert to an options object.
 * @returns {Object} Options object.
 */
    function prepareOptions(value) {
        value = value || {};
        if (value === "all" || value.all) {
            value = {natives: true, extensibility: true};
        } else if (isType(value, "string")) {
            value = self.forEach(value, /[^\s,]+/, function (m) {
                this[m] = true;
            }, {});
        }
        return value;
    }

/**
 * Runs built-in/custom tokens in reverse insertion order, until a match is found.
 * @private
 * @param {String} pattern Original pattern from which an XRegExp object is being built.
 * @param {Number} pos Position to search for tokens within `pattern`.
 * @param {Number} scope Current regex scope.
 * @param {Object} context Context object assigned to token handler functions.
 * @returns {Object} Object with properties `output` (the substitution string returned by the
 *   successful token handler) and `match` (the token's match array), or null.
 */
    function runTokens(pattern, pos, scope, context) {
        var i = tokens.length,
            result = null,
            match,
            t;
        // Protect against constructing XRegExps within token handler and trigger functions
        isInsideConstructor = true;
        // Must reset `isInsideConstructor`, even if a `trigger` or `handler` throws
        try {
            while (i--) { // Run in reverse order
                t = tokens[i];
                if ((t.scope === "all" || t.scope === scope) && (!t.trigger || t.trigger.call(context))) {
                    t.pattern.lastIndex = pos;
                    match = fixed.exec.call(t.pattern, pattern); // Fixed `exec` here allows use of named backreferences, etc.
                    if (match && match.index === pos) {
                        result = {
                            output: t.handler.call(context, match, scope),
                            match: match
                        };
                        break;
                    }
                }
            }
        } catch (err) {
            throw err;
        } finally {
            isInsideConstructor = false;
        }
        return result;
    }

/**
 * Enables or disables XRegExp syntax and flag extensibility.
 * @private
 * @param {Boolean} on `true` to enable; `false` to disable.
 */
    function setExtensibility(on) {
        self.addToken = addToken[on ? "on" : "off"];
        features.extensibility = on;
    }

/**
 * Enables or disables native method overrides.
 * @private
 * @param {Boolean} on `true` to enable; `false` to disable.
 */
    function setNatives(on) {
        RegExp.prototype.exec = (on ? fixed : nativ).exec;
        RegExp.prototype.test = (on ? fixed : nativ).test;
        String.prototype.match = (on ? fixed : nativ).match;
        String.prototype.replace = (on ? fixed : nativ).replace;
        String.prototype.split = (on ? fixed : nativ).split;
        features.natives = on;
    }

/*--------------------------------------
 *  Constructor
 *------------------------------------*/

/**
 * Creates an extended regular expression object for matching text with a pattern. Differs from a
 * native regular expression in that additional syntax and flags are supported. The returned object
 * is in fact a native `RegExp` and works with all native methods.
 * @class XRegExp
 * @constructor
 * @param {String|RegExp} pattern Regex pattern string, or an existing `RegExp` object to copy.
 * @param {String} [flags] Any combination of flags:
 *   <li>`g` - global
 *   <li>`i` - ignore case
 *   <li>`m` - multiline anchors
 *   <li>`n` - explicit capture
 *   <li>`s` - dot matches all (aka singleline)
 *   <li>`x` - free-spacing and line comments (aka extended)
 *   <li>`y` - sticky (Firefox 3+ only)
 *   Flags cannot be provided when constructing one `RegExp` from another.
 * @returns {RegExp} Extended regular expression object.
 * @example
 *
 * // With named capture and flag x
 * date = XRegExp('(?<year>  [0-9]{4}) -?  # year  \n\
 *                 (?<month> [0-9]{2}) -?  # month \n\
 *                 (?<day>   [0-9]{2})     # day   ', 'x');
 *
 * // Passing a regex object to copy it. The copy maintains special properties for named capture,
 * // is augmented with `XRegExp.prototype` methods, and has a fresh `lastIndex` property (set to
 * // zero). Native regexes are not recompiled using XRegExp syntax.
 * XRegExp(/regex/);
 */
    self = function (pattern, flags) {
        if (self.isRegExp(pattern)) {
            if (flags !== undef) {
                throw new TypeError("can't supply flags when constructing one RegExp from another");
            }
            return copy(pattern);
        }
        // Tokens become part of the regex construction process, so protect against infinite recursion
        // when an XRegExp is constructed within a token handler function
        if (isInsideConstructor) {
            throw new Error("can't call the XRegExp constructor within token definition functions");
        }

        var output = [],
            scope = defaultScope,
            tokenContext = {
                hasNamedCapture: false,
                captureNames: [],
                hasFlag: function (flag) {
                    return flags.indexOf(flag) > -1;
                }
            },
            pos = 0,
            tokenResult,
            match,
            chr;
        pattern = pattern === undef ? "" : String(pattern);
        flags = flags === undef ? "" : String(flags);

        if (nativ.match.call(flags, duplicateFlags)) { // Don't use test/exec because they would update lastIndex
            throw new SyntaxError("invalid duplicate regular expression flag");
        }
        // Strip/apply leading mode modifier with any combination of flags except g or y: (?imnsx)
        pattern = nativ.replace.call(pattern, /^\(\?([\w$]+)\)/, function ($0, $1) {
            if (nativ.test.call(/[gy]/, $1)) {
                throw new SyntaxError("can't use flag g or y in mode modifier");
            }
            flags = nativ.replace.call(flags + $1, duplicateFlags, "");
            return "";
        });
        self.forEach(flags, /[\s\S]/, function (m) {
            if (registeredFlags.indexOf(m[0]) < 0) {
                throw new SyntaxError("invalid regular expression flag " + m[0]);
            }
        });

        while (pos < pattern.length) {
            // Check for custom tokens at the current position
            tokenResult = runTokens(pattern, pos, scope, tokenContext);
            if (tokenResult) {
                output.push(tokenResult.output);
                pos += (tokenResult.match[0].length || 1);
            } else {
                // Check for native tokens (except character classes) at the current position
                match = nativ.exec.call(nativeTokens[scope], pattern.slice(pos));
                if (match) {
                    output.push(match[0]);
                    pos += match[0].length;
                } else {
                    chr = pattern.charAt(pos);
                    if (chr === "[") {
                        scope = classScope;
                    } else if (chr === "]") {
                        scope = defaultScope;
                    }
                    // Advance position by one character
                    output.push(chr);
                    ++pos;
                }
            }
        }

        return augment(new RegExp(output.join(""), nativ.replace.call(flags, /[^gimy]+/g, "")),
                       tokenContext.hasNamedCapture ? tokenContext.captureNames : null);
    };

/*--------------------------------------
 *  Public methods/properties
 *------------------------------------*/

// Installed and uninstalled states for `XRegExp.addToken`
    addToken = {
        on: function (regex, handler, options) {
            options = options || {};
            if (regex) {
                tokens.push({
                    pattern: copy(regex, "g" + (hasNativeY ? "y" : "")),
                    handler: handler,
                    scope: options.scope || defaultScope,
                    trigger: options.trigger || null
                });
            }
            // Providing `customFlags` with null `regex` and `handler` allows adding flags that do
            // nothing, but don't throw an error
            if (options.customFlags) {
                registeredFlags = nativ.replace.call(registeredFlags + options.customFlags, duplicateFlags, "");
            }
        },
        off: function () {
            throw new Error("extensibility must be installed before using addToken");
        }
    };

/**
 * Extends or changes XRegExp syntax and allows custom flags. This is used internally and can be
 * used to create XRegExp addons. `XRegExp.install('extensibility')` must be run before calling
 * this function, or an error is thrown. If more than one token can match the same string, the last
 * added wins.
 * @memberOf XRegExp
 * @param {RegExp} regex Regex object that matches the new token.
 * @param {Function} handler Function that returns a new pattern string (using native regex syntax)
 *   to replace the matched token within all future XRegExp regexes. Has access to persistent
 *   properties of the regex being built, through `this`. Invoked with two arguments:
 *   <li>The match array, with named backreference properties.
 *   <li>The regex scope where the match was found.
 * @param {Object} [options] Options object with optional properties:
 *   <li>`scope` {String} Scopes where the token applies: 'default', 'class', or 'all'.
 *   <li>`trigger` {Function} Function that returns `true` when the token should be applied; e.g.,
 *     if a flag is set. If `false` is returned, the matched string can be matched by other tokens.
 *     Has access to persistent properties of the regex being built, through `this` (including
 *     function `this.hasFlag`).
 *   <li>`customFlags` {String} Nonnative flags used by the token's handler or trigger functions.
 *     Prevents XRegExp from throwing an invalid flag error when the specified flags are used.
 * @example
 *
 * // Basic usage: Adds \a for ALERT character
 * XRegExp.addToken(
 *   /\\a/,
 *   function () {return '\\x07';},
 *   {scope: 'all'}
 * );
 * XRegExp('\\a[\\a-\\n]+').test('\x07\n\x07'); // -> true
 */
    self.addToken = addToken.off;

/**
 * Caches and returns the result of calling `XRegExp(pattern, flags)`. On any subsequent call with
 * the same pattern and flag combination, the cached copy is returned.
 * @memberOf XRegExp
 * @param {String} pattern Regex pattern string.
 * @param {String} [flags] Any combination of XRegExp flags.
 * @returns {RegExp} Cached XRegExp object.
 * @example
 *
 * while (match = XRegExp.cache('.', 'gs').exec(str)) {
 *   // The regex is compiled once only
 * }
 */
    self.cache = function (pattern, flags) {
        var key = pattern + "/" + (flags || "");
        return cache[key] || (cache[key] = self(pattern, flags));
    };

/**
 * Escapes any regular expression metacharacters, for use when matching literal strings. The result
 * can safely be used at any point within a regex that uses any flags.
 * @memberOf XRegExp
 * @param {String} str String to escape.
 * @returns {String} String with regex metacharacters escaped.
 * @example
 *
 * XRegExp.escape('Escaped? <.>');
 * // -> 'Escaped\?\ <\.>'
 */
    self.escape = function (str) {
        return nativ.replace.call(str, /[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
    };

/**
 * Executes a regex search in a specified string. Returns a match array or `null`. If the provided
 * regex uses named capture, named backreference properties are included on the match array.
 * Optional `pos` and `sticky` arguments specify the search start position, and whether the match
 * must start at the specified position only. The `lastIndex` property of the provided regex is not
 * used, but is updated for compatibility. Also fixes browser bugs compared to the native
 * `RegExp.prototype.exec` and can be used reliably cross-browser.
 * @memberOf XRegExp
 * @param {String} str String to search.
 * @param {RegExp} regex Regex to search with.
 * @param {Number} [pos=0] Zero-based index at which to start the search.
 * @param {Boolean|String} [sticky=false] Whether the match must start at the specified position
 *   only. The string `'sticky'` is accepted as an alternative to `true`.
 * @returns {Array} Match array with named backreference properties, or null.
 * @example
 *
 * // Basic use, with named backreference
 * var match = XRegExp.exec('U+2620', XRegExp('U\\+(?<hex>[0-9A-F]{4})'));
 * match.hex; // -> '2620'
 *
 * // With pos and sticky, in a loop
 * var pos = 2, result = [], match;
 * while (match = XRegExp.exec('<1><2><3><4>5<6>', /<(\d)>/, pos, 'sticky')) {
 *   result.push(match[1]);
 *   pos = match.index + match[0].length;
 * }
 * // result -> ['2', '3', '4']
 */
    self.exec = function (str, regex, pos, sticky) {
        var r2 = copy(regex, "g" + (sticky && hasNativeY ? "y" : ""), (sticky === false ? "y" : "")),
            match;
        r2.lastIndex = pos = pos || 0;
        match = fixed.exec.call(r2, str); // Fixed `exec` required for `lastIndex` fix, etc.
        if (sticky && match && match.index !== pos) {
            match = null;
        }
        if (regex.global) {
            regex.lastIndex = match ? r2.lastIndex : 0;
        }
        return match;
    };

/**
 * Executes a provided function once per regex match.
 * @memberOf XRegExp
 * @param {String} str String to search.
 * @param {RegExp} regex Regex to search with.
 * @param {Function} callback Function to execute for each match. Invoked with four arguments:
 *   <li>The match array, with named backreference properties.
 *   <li>The zero-based match index.
 *   <li>The string being traversed.
 *   <li>The regex object being used to traverse the string.
 * @param {*} [context] Object to use as `this` when executing `callback`.
 * @returns {*} Provided `context` object.
 * @example
 *
 * // Extracts every other digit from a string
 * XRegExp.forEach('1a2345', /\d/, function (match, i) {
 *   if (i % 2) this.push(+match[0]);
 * }, []);
 * // -> [2, 4]
 */
    self.forEach = function (str, regex, callback, context) {
        var pos = 0,
            i = -1,
            match;
        while ((match = self.exec(str, regex, pos))) {
            callback.call(context, match, ++i, str, regex);
            pos = match.index + (match[0].length || 1);
        }
        return context;
    };

/**
 * Copies a regex object and adds flag `g`. The copy maintains special properties for named
 * capture, is augmented with `XRegExp.prototype` methods, and has a fresh `lastIndex` property
 * (set to zero). Native regexes are not recompiled using XRegExp syntax.
 * @memberOf XRegExp
 * @param {RegExp} regex Regex to globalize.
 * @returns {RegExp} Copy of the provided regex with flag `g` added.
 * @example
 *
 * var globalCopy = XRegExp.globalize(/regex/);
 * globalCopy.global; // -> true
 */
    self.globalize = function (regex) {
        return copy(regex, "g");
    };

/**
 * Installs optional features according to the specified options.
 * @memberOf XRegExp
 * @param {Object|String} options Options object or string.
 * @example
 *
 * // With an options object
 * XRegExp.install({
 *   // Overrides native regex methods with fixed/extended versions that support named
 *   // backreferences and fix numerous cross-browser bugs
 *   natives: true,
 *
 *   // Enables extensibility of XRegExp syntax and flags
 *   extensibility: true
 * });
 *
 * // With an options string
 * XRegExp.install('natives extensibility');
 *
 * // Using a shortcut to install all optional features
 * XRegExp.install('all');
 */
    self.install = function (options) {
        options = prepareOptions(options);
        if (!features.natives && options.natives) {
            setNatives(true);
        }
        if (!features.extensibility && options.extensibility) {
            setExtensibility(true);
        }
    };

/**
 * Checks whether an individual optional feature is installed.
 * @memberOf XRegExp
 * @param {String} feature Name of the feature to check. One of:
 *   <li>`natives`
 *   <li>`extensibility`
 * @returns {Boolean} Whether the feature is installed.
 * @example
 *
 * XRegExp.isInstalled('natives');
 */
    self.isInstalled = function (feature) {
        return !!(features[feature]);
    };

/**
 * Returns `true` if an object is a regex; `false` if it isn't. This works correctly for regexes
 * created in another frame, when `instanceof` and `constructor` checks would fail.
 * @memberOf XRegExp
 * @param {*} value Object to check.
 * @returns {Boolean} Whether the object is a `RegExp` object.
 * @example
 *
 * XRegExp.isRegExp('string'); // -> false
 * XRegExp.isRegExp(/regex/i); // -> true
 * XRegExp.isRegExp(RegExp('^', 'm')); // -> true
 * XRegExp.isRegExp(XRegExp('(?s).')); // -> true
 */
    self.isRegExp = function (value) {
        return isType(value, "regexp");
    };

/**
 * Retrieves the matches from searching a string using a chain of regexes that successively search
 * within previous matches. The provided `chain` array can contain regexes and objects with `regex`
 * and `backref` properties. When a backreference is specified, the named or numbered backreference
 * is passed forward to the next regex or returned.
 * @memberOf XRegExp
 * @param {String} str String to search.
 * @param {Array} chain Regexes that each search for matches within preceding results.
 * @returns {Array} Matches by the last regex in the chain, or an empty array.
 * @example
 *
 * // Basic usage; matches numbers within <b> tags
 * XRegExp.matchChain('1 <b>2</b> 3 <b>4 a 56</b>', [
 *   XRegExp('(?is)<b>.*?</b>'),
 *   /\d+/
 * ]);
 * // -> ['2', '4', '56']
 *
 * // Passing forward and returning specific backreferences
 * html = '<a href="http://xregexp.com/api/">XRegExp</a>\
 *         <a href="http://www.google.com/">Google</a>';
 * XRegExp.matchChain(html, [
 *   {regex: /<a href="([^"]+)">/i, backref: 1},
 *   {regex: XRegExp('(?i)^https?://(?<domain>[^/?#]+)'), backref: 'domain'}
 * ]);
 * // -> ['xregexp.com', 'www.google.com']
 */
    self.matchChain = function (str, chain) {
        return (function recurseChain(values, level) {
            var item = chain[level].regex ? chain[level] : {regex: chain[level]},
                matches = [],
                addMatch = function (match) {
                    matches.push(item.backref ? (match[item.backref] || "") : match[0]);
                },
                i;
            for (i = 0; i < values.length; ++i) {
                self.forEach(values[i], item.regex, addMatch);
            }
            return ((level === chain.length - 1) || !matches.length) ?
                    matches :
                    recurseChain(matches, level + 1);
        }([str], 0));
    };

/**
 * Returns a new string with one or all matches of a pattern replaced. The pattern can be a string
 * or regex, and the replacement can be a string or a function to be called for each match. To
 * perform a global search and replace, use the optional `scope` argument or include flag `g` if
 * using a regex. Replacement strings can use `${n}` for named and numbered backreferences.
 * Replacement functions can use named backreferences via `arguments[0].name`. Also fixes browser
 * bugs compared to the native `String.prototype.replace` and can be used reliably cross-browser.
 * @memberOf XRegExp
 * @param {String} str String to search.
 * @param {RegExp|String} search Search pattern to be replaced.
 * @param {String|Function} replacement Replacement string or a function invoked to create it.
 *   Replacement strings can include special replacement syntax:
 *     <li>$$ - Inserts a literal '$'.
 *     <li>$&, $0 - Inserts the matched substring.
 *     <li>$` - Inserts the string that precedes the matched substring (left context).
 *     <li>$' - Inserts the string that follows the matched substring (right context).
 *     <li>$n, $nn - Where n/nn are digits referencing an existent capturing group, inserts
 *       backreference n/nn.
 *     <li>${n} - Where n is a name or any number of digits that reference an existent capturing
 *       group, inserts backreference n.
 *   Replacement functions are invoked with three or more arguments:
 *     <li>The matched substring (corresponds to $& above). Named backreferences are accessible as
 *       properties of this first argument.
 *     <li>0..n arguments, one for each backreference (corresponding to $1, $2, etc. above).
 *     <li>The zero-based index of the match within the total search string.
 *     <li>The total string being searched.
 * @param {String} [scope='one'] Use 'one' to replace the first match only, or 'all'. If not
 *   explicitly specified and using a regex with flag `g`, `scope` is 'all'.
 * @returns {String} New string with one or all matches replaced.
 * @example
 *
 * // Regex search, using named backreferences in replacement string
 * var name = XRegExp('(?<first>\\w+) (?<last>\\w+)');
 * XRegExp.replace('John Smith', name, '${last}, ${first}');
 * // -> 'Smith, John'
 *
 * // Regex search, using named backreferences in replacement function
 * XRegExp.replace('John Smith', name, function (match) {
 *   return match.last + ', ' + match.first;
 * });
 * // -> 'Smith, John'
 *
 * // Global string search/replacement
 * XRegExp.replace('RegExp builds RegExps', 'RegExp', 'XRegExp', 'all');
 * // -> 'XRegExp builds XRegExps'
 */
    self.replace = function (str, search, replacement, scope) {
        var isRegex = self.isRegExp(search),
            search2 = search,
            result;
        if (isRegex) {
            if (scope === undef && search.global) {
                scope = "all"; // Follow flag g when `scope` isn't explicit
            }
            // Note that since a copy is used, `search`'s `lastIndex` isn't updated *during* replacement iterations
            search2 = copy(search, scope === "all" ? "g" : "", scope === "all" ? "" : "g");
        } else if (scope === "all") {
            search2 = new RegExp(self.escape(String(search)), "g");
        }
        result = fixed.replace.call(String(str), search2, replacement); // Fixed `replace` required for named backreferences, etc.
        if (isRegex && search.global) {
            search.lastIndex = 0; // Fixes IE, Safari bug (last tested IE 9, Safari 5.1)
        }
        return result;
    };

/**
 * Splits a string into an array of strings using a regex or string separator. Matches of the
 * separator are not included in the result array. However, if `separator` is a regex that contains
 * capturing groups, backreferences are spliced into the result each time `separator` is matched.
 * Fixes browser bugs compared to the native `String.prototype.split` and can be used reliably
 * cross-browser.
 * @memberOf XRegExp
 * @param {String} str String to split.
 * @param {RegExp|String} separator Regex or string to use for separating the string.
 * @param {Number} [limit] Maximum number of items to include in the result array.
 * @returns {Array} Array of substrings.
 * @example
 *
 * // Basic use
 * XRegExp.split('a b c', ' ');
 * // -> ['a', 'b', 'c']
 *
 * // With limit
 * XRegExp.split('a b c', ' ', 2);
 * // -> ['a', 'b']
 *
 * // Backreferences in result array
 * XRegExp.split('..word1..', /([a-z]+)(\d+)/i);
 * // -> ['..', 'word', '1', '..']
 */
    self.split = function (str, separator, limit) {
        return fixed.split.call(str, separator, limit);
    };

/**
 * Executes a regex search in a specified string. Returns `true` or `false`. Optional `pos` and
 * `sticky` arguments specify the search start position, and whether the match must start at the
 * specified position only. The `lastIndex` property of the provided regex is not used, but is
 * updated for compatibility. Also fixes browser bugs compared to the native
 * `RegExp.prototype.test` and can be used reliably cross-browser.
 * @memberOf XRegExp
 * @param {String} str String to search.
 * @param {RegExp} regex Regex to search with.
 * @param {Number} [pos=0] Zero-based index at which to start the search.
 * @param {Boolean|String} [sticky=false] Whether the match must start at the specified position
 *   only. The string `'sticky'` is accepted as an alternative to `true`.
 * @returns {Boolean} Whether the regex matched the provided value.
 * @example
 *
 * // Basic use
 * XRegExp.test('abc', /c/); // -> true
 *
 * // With pos and sticky
 * XRegExp.test('abc', /c/, 0, 'sticky'); // -> false
 */
    self.test = function (str, regex, pos, sticky) {
        // Do this the easy way :-)
        return !!self.exec(str, regex, pos, sticky);
    };

/**
 * Uninstalls optional features according to the specified options.
 * @memberOf XRegExp
 * @param {Object|String} options Options object or string.
 * @example
 *
 * // With an options object
 * XRegExp.uninstall({
 *   // Restores native regex methods
 *   natives: true,
 *
 *   // Disables additional syntax and flag extensions
 *   extensibility: true
 * });
 *
 * // With an options string
 * XRegExp.uninstall('natives extensibility');
 *
 * // Using a shortcut to uninstall all optional features
 * XRegExp.uninstall('all');
 */
    self.uninstall = function (options) {
        options = prepareOptions(options);
        if (features.natives && options.natives) {
            setNatives(false);
        }
        if (features.extensibility && options.extensibility) {
            setExtensibility(false);
        }
    };

/**
 * Returns an XRegExp object that is the union of the given patterns. Patterns can be provided as
 * regex objects or strings. Metacharacters are escaped in patterns provided as strings.
 * Backreferences in provided regex objects are automatically renumbered to work correctly. Native
 * flags used by provided regexes are ignored in favor of the `flags` argument.
 * @memberOf XRegExp
 * @param {Array} patterns Regexes and strings to combine.
 * @param {String} [flags] Any combination of XRegExp flags.
 * @returns {RegExp} Union of the provided regexes and strings.
 * @example
 *
 * XRegExp.union(['a+b*c', /(dogs)\1/, /(cats)\1/], 'i');
 * // -> /a\+b\*c|(dogs)\1|(cats)\2/i
 *
 * XRegExp.union([XRegExp('(?<pet>dogs)\\k<pet>'), XRegExp('(?<pet>cats)\\k<pet>')]);
 * // -> XRegExp('(?<pet>dogs)\\k<pet>|(?<pet>cats)\\k<pet>')
 */
    self.union = function (patterns, flags) {
        var parts = /(\()(?!\?)|\\([1-9]\d*)|\\[\s\S]|\[(?:[^\\\]]|\\[\s\S])*]/g,
            numCaptures = 0,
            numPriorCaptures,
            captureNames,
            rewrite = function (match, paren, backref) {
                var name = captureNames[numCaptures - numPriorCaptures];
                if (paren) { // Capturing group
                    ++numCaptures;
                    if (name) { // If the current capture has a name
                        return "(?<" + name + ">";
                    }
                } else if (backref) { // Backreference
                    return "\\" + (+backref + numPriorCaptures);
                }
                return match;
            },
            output = [],
            pattern,
            i;
        if (!(isType(patterns, "array") && patterns.length)) {
            throw new TypeError("patterns must be a nonempty array");
        }
        for (i = 0; i < patterns.length; ++i) {
            pattern = patterns[i];
            if (self.isRegExp(pattern)) {
                numPriorCaptures = numCaptures;
                captureNames = (pattern.xregexp && pattern.xregexp.captureNames) || [];
                // Rewrite backreferences. Passing to XRegExp dies on octals and ensures patterns
                // are independently valid; helps keep this simple. Named captures are put back
                output.push(self(pattern.source).source.replace(parts, rewrite));
            } else {
                output.push(self.escape(pattern));
            }
        }
        return self(output.join("|"), flags);
    };

/**
 * The XRegExp version number.
 * @static
 * @memberOf XRegExp
 * @type String
 */
    self.version = "2.0.0";

/*--------------------------------------
 *  Fixed/extended native methods
 *------------------------------------*/

/**
 * Adds named capture support (with backreferences returned as `result.name`), and fixes browser
 * bugs in the native `RegExp.prototype.exec`. Calling `XRegExp.install('natives')` uses this to
 * override the native method. Use via `XRegExp.exec` without overriding natives.
 * @private
 * @param {String} str String to search.
 * @returns {Array} Match array with named backreference properties, or null.
 */
    fixed.exec = function (str) {
        var match, name, r2, origLastIndex, i;
        if (!this.global) {
            origLastIndex = this.lastIndex;
        }
        match = nativ.exec.apply(this, arguments);
        if (match) {
            // Fix browsers whose `exec` methods don't consistently return `undefined` for
            // nonparticipating capturing groups
            if (!compliantExecNpcg && match.length > 1 && lastIndexOf(match, "") > -1) {
                r2 = new RegExp(this.source, nativ.replace.call(getNativeFlags(this), "g", ""));
                // Using `str.slice(match.index)` rather than `match[0]` in case lookahead allowed
                // matching due to characters outside the match
                nativ.replace.call(String(str).slice(match.index), r2, function () {
                    var i;
                    for (i = 1; i < arguments.length - 2; ++i) {
                        if (arguments[i] === undef) {
                            match[i] = undef;
                        }
                    }
                });
            }
            // Attach named capture properties
            if (this.xregexp && this.xregexp.captureNames) {
                for (i = 1; i < match.length; ++i) {
                    name = this.xregexp.captureNames[i - 1];
                    if (name) {
                        match[name] = match[i];
                    }
                }
            }
            // Fix browsers that increment `lastIndex` after zero-length matches
            if (this.global && !match[0].length && (this.lastIndex > match.index)) {
                this.lastIndex = match.index;
            }
        }
        if (!this.global) {
            this.lastIndex = origLastIndex; // Fixes IE, Opera bug (last tested IE 9, Opera 11.6)
        }
        return match;
    };

/**
 * Fixes browser bugs in the native `RegExp.prototype.test`. Calling `XRegExp.install('natives')`
 * uses this to override the native method.
 * @private
 * @param {String} str String to search.
 * @returns {Boolean} Whether the regex matched the provided value.
 */
    fixed.test = function (str) {
        // Do this the easy way :-)
        return !!fixed.exec.call(this, str);
    };

/**
 * Adds named capture support (with backreferences returned as `result.name`), and fixes browser
 * bugs in the native `String.prototype.match`. Calling `XRegExp.install('natives')` uses this to
 * override the native method.
 * @private
 * @param {RegExp} regex Regex to search with.
 * @returns {Array} If `regex` uses flag g, an array of match strings or null. Without flag g, the
 *   result of calling `regex.exec(this)`.
 */
    fixed.match = function (regex) {
        if (!self.isRegExp(regex)) {
            regex = new RegExp(regex); // Use native `RegExp`
        } else if (regex.global) {
            var result = nativ.match.apply(this, arguments);
            regex.lastIndex = 0; // Fixes IE bug
            return result;
        }
        return fixed.exec.call(regex, this);
    };

/**
 * Adds support for `${n}` tokens for named and numbered backreferences in replacement text, and
 * provides named backreferences to replacement functions as `arguments[0].name`. Also fixes
 * browser bugs in replacement text syntax when performing a replacement using a nonregex search
 * value, and the value of a replacement regex's `lastIndex` property during replacement iterations
 * and upon completion. Note that this doesn't support SpiderMonkey's proprietary third (`flags`)
 * argument. Calling `XRegExp.install('natives')` uses this to override the native method. Use via
 * `XRegExp.replace` without overriding natives.
 * @private
 * @param {RegExp|String} search Search pattern to be replaced.
 * @param {String|Function} replacement Replacement string or a function invoked to create it.
 * @returns {String} New string with one or all matches replaced.
 */
    fixed.replace = function (search, replacement) {
        var isRegex = self.isRegExp(search), captureNames, result, str, origLastIndex;
        if (isRegex) {
            if (search.xregexp) {
                captureNames = search.xregexp.captureNames;
            }
            if (!search.global) {
                origLastIndex = search.lastIndex;
            }
        } else {
            search += "";
        }
        if (isType(replacement, "function")) {
            result = nativ.replace.call(String(this), search, function () {
                var args = arguments, i;
                if (captureNames) {
                    // Change the `arguments[0]` string primitive to a `String` object that can store properties
                    args[0] = new String(args[0]);
                    // Store named backreferences on the first argument
                    for (i = 0; i < captureNames.length; ++i) {
                        if (captureNames[i]) {
                            args[0][captureNames[i]] = args[i + 1];
                        }
                    }
                }
                // Update `lastIndex` before calling `replacement`.
                // Fixes IE, Chrome, Firefox, Safari bug (last tested IE 9, Chrome 17, Firefox 11, Safari 5.1)
                if (isRegex && search.global) {
                    search.lastIndex = args[args.length - 2] + args[0].length;
                }
                return replacement.apply(null, args);
            });
        } else {
            str = String(this); // Ensure `args[args.length - 1]` will be a string when given nonstring `this`
            result = nativ.replace.call(str, search, function () {
                var args = arguments; // Keep this function's `arguments` available through closure
                return nativ.replace.call(String(replacement), replacementToken, function ($0, $1, $2) {
                    var n;
                    // Named or numbered backreference with curly brackets
                    if ($1) {
                        /* XRegExp behavior for `${n}`:
                         * 1. Backreference to numbered capture, where `n` is 1+ digits. `0`, `00`, etc. is the entire match.
                         * 2. Backreference to named capture `n`, if it exists and is not a number overridden by numbered capture.
                         * 3. Otherwise, it's an error.
                         */
                        n = +$1; // Type-convert; drop leading zeros
                        if (n <= args.length - 3) {
                            return args[n] || "";
                        }
                        n = captureNames ? lastIndexOf(captureNames, $1) : -1;
                        if (n < 0) {
                            throw new SyntaxError("backreference to undefined group " + $0);
                        }
                        return args[n + 1] || "";
                    }
                    // Else, special variable or numbered backreference (without curly brackets)
                    if ($2 === "$") return "$";
                    if ($2 === "&" || +$2 === 0) return args[0]; // $&, $0 (not followed by 1-9), $00
                    if ($2 === "`") return args[args.length - 1].slice(0, args[args.length - 2]);
                    if ($2 === "'") return args[args.length - 1].slice(args[args.length - 2] + args[0].length);
                    // Else, numbered backreference (without curly brackets)
                    $2 = +$2; // Type-convert; drop leading zero
                    /* XRegExp behavior:
                     * - Backreferences without curly brackets end after 1 or 2 digits. Use `${..}` for more digits.
                     * - `$1` is an error if there are no capturing groups.
                     * - `$10` is an error if there are less than 10 capturing groups. Use `${1}0` instead.
                     * - `$01` is equivalent to `$1` if a capturing group exists, otherwise it's an error.
                     * - `$0` (not followed by 1-9), `$00`, and `$&` are the entire match.
                     * Native behavior, for comparison:
                     * - Backreferences end after 1 or 2 digits. Cannot use backreference to capturing group 100+.
                     * - `$1` is a literal `$1` if there are no capturing groups.
                     * - `$10` is `$1` followed by a literal `0` if there are less than 10 capturing groups.
                     * - `$01` is equivalent to `$1` if a capturing group exists, otherwise it's a literal `$01`.
                     * - `$0` is a literal `$0`. `$&` is the entire match.
                     */
                    if (!isNaN($2)) {
                        if ($2 > args.length - 3) {
                            throw new SyntaxError("backreference to undefined group " + $0);
                        }
                        return args[$2] || "";
                    }
                    throw new SyntaxError("invalid token " + $0);
                });
            });
        }
        if (isRegex) {
            if (search.global) {
                search.lastIndex = 0; // Fixes IE, Safari bug (last tested IE 9, Safari 5.1)
            } else {
                search.lastIndex = origLastIndex; // Fixes IE, Opera bug (last tested IE 9, Opera 11.6)
            }
        }
        return result;
    };

/**
 * Fixes browser bugs in the native `String.prototype.split`. Calling `XRegExp.install('natives')`
 * uses this to override the native method. Use via `XRegExp.split` without overriding natives.
 * @private
 * @param {RegExp|String} separator Regex or string to use for separating the string.
 * @param {Number} [limit] Maximum number of items to include in the result array.
 * @returns {Array} Array of substrings.
 */
    fixed.split = function (separator, limit) {
        if (!self.isRegExp(separator)) {
            return nativ.split.apply(this, arguments); // use faster native method
        }
        var str = String(this),
            origLastIndex = separator.lastIndex,
            output = [],
            lastLastIndex = 0,
            lastLength;
        /* Values for `limit`, per the spec:
         * If undefined: pow(2,32) - 1
         * If 0, Infinity, or NaN: 0
         * If positive number: limit = floor(limit); if (limit >= pow(2,32)) limit -= pow(2,32);
         * If negative number: pow(2,32) - floor(abs(limit))
         * If other: Type-convert, then use the above rules
         */
        limit = (limit === undef ? -1 : limit) >>> 0;
        self.forEach(str, separator, function (match) {
            if ((match.index + match[0].length) > lastLastIndex) { // != `if (match[0].length)`
                output.push(str.slice(lastLastIndex, match.index));
                if (match.length > 1 && match.index < str.length) {
                    Array.prototype.push.apply(output, match.slice(1));
                }
                lastLength = match[0].length;
                lastLastIndex = match.index + lastLength;
            }
        });
        if (lastLastIndex === str.length) {
            if (!nativ.test.call(separator, "") || lastLength) {
                output.push("");
            }
        } else {
            output.push(str.slice(lastLastIndex));
        }
        separator.lastIndex = origLastIndex;
        return output.length > limit ? output.slice(0, limit) : output;
    };

/*--------------------------------------
 *  Built-in tokens
 *------------------------------------*/

// Shortcut
    add = addToken.on;

/* Letter identity escapes that natively match literal characters: \p, \P, etc.
 * Should be SyntaxErrors but are allowed in web reality. XRegExp makes them errors for cross-
 * browser consistency and to reserve their syntax, but lets them be superseded by XRegExp addons.
 */
    add(/\\([ABCE-RTUVXYZaeg-mopqyz]|c(?![A-Za-z])|u(?![\dA-Fa-f]{4})|x(?![\dA-Fa-f]{2}))/,
        function (match, scope) {
            // \B is allowed in default scope only
            if (match[1] === "B" && scope === defaultScope) {
                return match[0];
            }
            throw new SyntaxError("invalid escape " + match[0]);
        },
        {scope: "all"});

/* Empty character class: [] or [^]
 * Fixes a critical cross-browser syntax inconsistency. Unless this is standardized (per the spec),
 * regex syntax can't be accurately parsed because character class endings can't be determined.
 */
    add(/\[(\^?)]/,
        function (match) {
            // For cross-browser compatibility with ES3, convert [] to \b\B and [^] to [\s\S].
            // (?!) should work like \b\B, but is unreliable in Firefox
            return match[1] ? "[\\s\\S]" : "\\b\\B";
        });

/* Comment pattern: (?# )
 * Inline comments are an alternative to the line comments allowed in free-spacing mode (flag x).
 */
    add(/(?:\(\?#[^)]*\))+/,
        function (match) {
            // Keep tokens separated unless the following token is a quantifier
            return nativ.test.call(quantifier, match.input.slice(match.index + match[0].length)) ? "" : "(?:)";
        });

/* Named backreference: \k<name>
 * Backreference names can use the characters A-Z, a-z, 0-9, _, and $ only.
 */
    add(/\\k<([\w$]+)>/,
        function (match) {
            var index = isNaN(match[1]) ? (lastIndexOf(this.captureNames, match[1]) + 1) : +match[1],
                endIndex = match.index + match[0].length;
            if (!index || index > this.captureNames.length) {
                throw new SyntaxError("backreference to undefined group " + match[0]);
            }
            // Keep backreferences separate from subsequent literal numbers
            return "\\" + index + (
                endIndex === match.input.length || isNaN(match.input.charAt(endIndex)) ? "" : "(?:)"
            );
        });

/* Whitespace and line comments, in free-spacing mode (aka extended mode, flag x) only.
 */
    add(/(?:\s+|#.*)+/,
        function (match) {
            // Keep tokens separated unless the following token is a quantifier
            return nativ.test.call(quantifier, match.input.slice(match.index + match[0].length)) ? "" : "(?:)";
        },
        {
            trigger: function () {
                return this.hasFlag("x");
            },
            customFlags: "x"
        });

/* Dot, in dotall mode (aka singleline mode, flag s) only.
 */
    add(/\./,
        function () {
            return "[\\s\\S]";
        },
        {
            trigger: function () {
                return this.hasFlag("s");
            },
            customFlags: "s"
        });

/* Named capturing group; match the opening delimiter only: (?<name>
 * Capture names can use the characters A-Z, a-z, 0-9, _, and $ only. Names can't be integers.
 * Supports Python-style (?P<name> as an alternate syntax to avoid issues in recent Opera (which
 * natively supports the Python-style syntax). Otherwise, XRegExp might treat numbered
 * backreferences to Python-style named capture as octals.
 */
    add(/\(\?P?<([\w$]+)>/,
        function (match) {
            if (!isNaN(match[1])) {
                // Avoid incorrect lookups, since named backreferences are added to match arrays
                throw new SyntaxError("can't use integer as capture name " + match[0]);
            }
            this.captureNames.push(match[1]);
            this.hasNamedCapture = true;
            return "(";
        });

/* Numbered backreference or octal, plus any following digits: \0, \11, etc.
 * Octals except \0 not followed by 0-9 and backreferences to unopened capture groups throw an
 * error. Other matches are returned unaltered. IE <= 8 doesn't support backreferences greater than
 * \99 in regex syntax.
 */
    add(/\\(\d+)/,
        function (match, scope) {
            if (!(scope === defaultScope && /^[1-9]/.test(match[1]) && +match[1] <= this.captureNames.length) &&
                    match[1] !== "0") {
                throw new SyntaxError("can't use octal escape or backreference to undefined group " + match[0]);
            }
            return match[0];
        },
        {scope: "all"});

/* Capturing group; match the opening parenthesis only.
 * Required for support of named capturing groups. Also adds explicit capture mode (flag n).
 */
    add(/\((?!\?)/,
        function () {
            if (this.hasFlag("n")) {
                return "(?:";
            }
            this.captureNames.push(null);
            return "(";
        },
        {customFlags: "n"});

/*--------------------------------------
 *  Expose XRegExp
 *------------------------------------*/

// For CommonJS enviroments
    if (typeof exports !== "undefined") {
        exports.XRegExp = self;
    }

    return self;

}());


/***** unicode-base.js *****/

/*!
 * XRegExp Unicode Base v1.0.0
 * (c) 2008-2012 Steven Levithan <http://xregexp.com/>
 * MIT License
 * Uses Unicode 6.1 <http://unicode.org/>
 */

/**
 * Adds support for the `\p{L}` or `\p{Letter}` Unicode category. Addon packages for other Unicode
 * categories, scripts, blocks, and properties are available separately. All Unicode tokens can be
 * inverted using `\P{..}` or `\p{^..}`. Token names are case insensitive, and any spaces, hyphens,
 * and underscores are ignored.
 * @requires XRegExp
 */
(function (XRegExp) {
    "use strict";

    var unicode = {};

/*--------------------------------------
 *  Private helper functions
 *------------------------------------*/

// Generates a standardized token name (lowercase, with hyphens, spaces, and underscores removed)
    function slug(name) {
        return name.replace(/[- _]+/g, "").toLowerCase();
    }

// Expands a list of Unicode code points and ranges to be usable in a regex character class
    function expand(str) {
        return str.replace(/\w{4}/g, "\\u$&");
    }

// Adds leading zeros if shorter than four characters
    function pad4(str) {
        while (str.length < 4) {
            str = "0" + str;
        }
        return str;
    }

// Converts a hexadecimal number to decimal
    function dec(hex) {
        return parseInt(hex, 16);
    }

// Converts a decimal number to hexadecimal
    function hex(dec) {
        return parseInt(dec, 10).toString(16);
    }

// Inverts a list of Unicode code points and ranges
    function invert(range) {
        var output = [],
            lastEnd = -1,
            start;
        XRegExp.forEach(range, /\\u(\w{4})(?:-\\u(\w{4}))?/, function (m) {
            start = dec(m[1]);
            if (start > (lastEnd + 1)) {
                output.push("\\u" + pad4(hex(lastEnd + 1)));
                if (start > (lastEnd + 2)) {
                    output.push("-\\u" + pad4(hex(start - 1)));
                }
            }
            lastEnd = dec(m[2] || m[1]);
        });
        if (lastEnd < 0xFFFF) {
            output.push("\\u" + pad4(hex(lastEnd + 1)));
            if (lastEnd < 0xFFFE) {
                output.push("-\\uFFFF");
            }
        }
        return output.join("");
    }

// Generates an inverted token on first use
    function cacheInversion(item) {
        return unicode["^" + item] || (unicode["^" + item] = invert(unicode[item]));
    }

/*--------------------------------------
 *  Core functionality
 *------------------------------------*/

    XRegExp.install("extensibility");

/**
 * Adds to the list of Unicode properties that XRegExp regexes can match via \p{..} or \P{..}.
 * @memberOf XRegExp
 * @param {Object} pack Named sets of Unicode code points and ranges.
 * @param {Object} [aliases] Aliases for the primary token names.
 * @example
 *
 * XRegExp.addUnicodePackage({
 *   XDigit: '0030-00390041-00460061-0066' // 0-9A-Fa-f
 * }, {
 *   XDigit: 'Hexadecimal'
 * });
 */
    XRegExp.addUnicodePackage = function (pack, aliases) {
        var p;
        if (!XRegExp.isInstalled("extensibility")) {
            throw new Error("extensibility must be installed before adding Unicode packages");
        }
        if (pack) {
            for (p in pack) {
                if (pack.hasOwnProperty(p)) {
                    unicode[slug(p)] = expand(pack[p]);
                }
            }
        }
        if (aliases) {
            for (p in aliases) {
                if (aliases.hasOwnProperty(p)) {
                    unicode[slug(aliases[p])] = unicode[slug(p)];
                }
            }
        }
    };

/* Adds data for the Unicode `Letter` category. Addon packages include other categories, scripts,
 * blocks, and properties.
 */
    XRegExp.addUnicodePackage({
        L: "0041-005A0061-007A00AA00B500BA00C0-00D600D8-00F600F8-02C102C6-02D102E0-02E402EC02EE0370-037403760377037A-037D03860388-038A038C038E-03A103A3-03F503F7-0481048A-05270531-055605590561-058705D0-05EA05F0-05F20620-064A066E066F0671-06D306D506E506E606EE06EF06FA-06FC06FF07100712-072F074D-07A507B107CA-07EA07F407F507FA0800-0815081A082408280840-085808A008A2-08AC0904-0939093D09500958-09610971-09770979-097F0985-098C098F09900993-09A809AA-09B009B209B6-09B909BD09CE09DC09DD09DF-09E109F009F10A05-0A0A0A0F0A100A13-0A280A2A-0A300A320A330A350A360A380A390A59-0A5C0A5E0A72-0A740A85-0A8D0A8F-0A910A93-0AA80AAA-0AB00AB20AB30AB5-0AB90ABD0AD00AE00AE10B05-0B0C0B0F0B100B13-0B280B2A-0B300B320B330B35-0B390B3D0B5C0B5D0B5F-0B610B710B830B85-0B8A0B8E-0B900B92-0B950B990B9A0B9C0B9E0B9F0BA30BA40BA8-0BAA0BAE-0BB90BD00C05-0C0C0C0E-0C100C12-0C280C2A-0C330C35-0C390C3D0C580C590C600C610C85-0C8C0C8E-0C900C92-0CA80CAA-0CB30CB5-0CB90CBD0CDE0CE00CE10CF10CF20D05-0D0C0D0E-0D100D12-0D3A0D3D0D4E0D600D610D7A-0D7F0D85-0D960D9A-0DB10DB3-0DBB0DBD0DC0-0DC60E01-0E300E320E330E40-0E460E810E820E840E870E880E8A0E8D0E94-0E970E99-0E9F0EA1-0EA30EA50EA70EAA0EAB0EAD-0EB00EB20EB30EBD0EC0-0EC40EC60EDC-0EDF0F000F40-0F470F49-0F6C0F88-0F8C1000-102A103F1050-1055105A-105D106110651066106E-10701075-1081108E10A0-10C510C710CD10D0-10FA10FC-1248124A-124D1250-12561258125A-125D1260-1288128A-128D1290-12B012B2-12B512B8-12BE12C012C2-12C512C8-12D612D8-13101312-13151318-135A1380-138F13A0-13F41401-166C166F-167F1681-169A16A0-16EA1700-170C170E-17111720-17311740-17511760-176C176E-17701780-17B317D717DC1820-18771880-18A818AA18B0-18F51900-191C1950-196D1970-19741980-19AB19C1-19C71A00-1A161A20-1A541AA71B05-1B331B45-1B4B1B83-1BA01BAE1BAF1BBA-1BE51C00-1C231C4D-1C4F1C5A-1C7D1CE9-1CEC1CEE-1CF11CF51CF61D00-1DBF1E00-1F151F18-1F1D1F20-1F451F48-1F4D1F50-1F571F591F5B1F5D1F5F-1F7D1F80-1FB41FB6-1FBC1FBE1FC2-1FC41FC6-1FCC1FD0-1FD31FD6-1FDB1FE0-1FEC1FF2-1FF41FF6-1FFC2071207F2090-209C21022107210A-211321152119-211D212421262128212A-212D212F-2139213C-213F2145-2149214E218321842C00-2C2E2C30-2C5E2C60-2CE42CEB-2CEE2CF22CF32D00-2D252D272D2D2D30-2D672D6F2D80-2D962DA0-2DA62DA8-2DAE2DB0-2DB62DB8-2DBE2DC0-2DC62DC8-2DCE2DD0-2DD62DD8-2DDE2E2F300530063031-3035303B303C3041-3096309D-309F30A1-30FA30FC-30FF3105-312D3131-318E31A0-31BA31F0-31FF3400-4DB54E00-9FCCA000-A48CA4D0-A4FDA500-A60CA610-A61FA62AA62BA640-A66EA67F-A697A6A0-A6E5A717-A71FA722-A788A78B-A78EA790-A793A7A0-A7AAA7F8-A801A803-A805A807-A80AA80C-A822A840-A873A882-A8B3A8F2-A8F7A8FBA90A-A925A930-A946A960-A97CA984-A9B2A9CFAA00-AA28AA40-AA42AA44-AA4BAA60-AA76AA7AAA80-AAAFAAB1AAB5AAB6AAB9-AABDAAC0AAC2AADB-AADDAAE0-AAEAAAF2-AAF4AB01-AB06AB09-AB0EAB11-AB16AB20-AB26AB28-AB2EABC0-ABE2AC00-D7A3D7B0-D7C6D7CB-D7FBF900-FA6DFA70-FAD9FB00-FB06FB13-FB17FB1DFB1F-FB28FB2A-FB36FB38-FB3CFB3EFB40FB41FB43FB44FB46-FBB1FBD3-FD3DFD50-FD8FFD92-FDC7FDF0-FDFBFE70-FE74FE76-FEFCFF21-FF3AFF41-FF5AFF66-FFBEFFC2-FFC7FFCA-FFCFFFD2-FFD7FFDA-FFDC"
    }, {
        L: "Letter"
    });

/* Adds Unicode property syntax to XRegExp: \p{..}, \P{..}, \p{^..}
 */
    XRegExp.addToken(
        /\\([pP]){(\^?)([^}]*)}/,
        function (match, scope) {
            var inv = (match[1] === "P" || match[2]) ? "^" : "",
                item = slug(match[3]);
            // The double negative \P{^..} is invalid
            if (match[1] === "P" && match[2]) {
                throw new SyntaxError("invalid double negation \\P{^");
            }
            if (!unicode.hasOwnProperty(item)) {
                throw new SyntaxError("invalid or unknown Unicode property " + match[0]);
            }
            return scope === "class" ?
                    (inv ? cacheInversion(item) : unicode[item]) :
                    "[" + inv + unicode[item] + "]";
        },
        {scope: "all"}
    );

}(XRegExp));


/***** unicode-categories.js *****/

/*!
 * XRegExp Unicode Categories v1.2.0
 * (c) 2010-2012 Steven Levithan <http://xregexp.com/>
 * MIT License
 * Uses Unicode 6.1 <http://unicode.org/>
 */

/**
 * Adds support for all Unicode categories (aka properties) E.g., `\p{Lu}` or
 * `\p{Uppercase Letter}`. Token names are case insensitive, and any spaces, hyphens, and
 * underscores are ignored.
 * @requires XRegExp, XRegExp Unicode Base
 */
(function (XRegExp) {
    "use strict";

    if (!XRegExp.addUnicodePackage) {
        throw new ReferenceError("Unicode Base must be loaded before Unicode Categories");
    }

    XRegExp.install("extensibility");

    XRegExp.addUnicodePackage({
        //L: "", // Included in the Unicode Base addon
        Ll: "0061-007A00B500DF-00F600F8-00FF01010103010501070109010B010D010F01110113011501170119011B011D011F01210123012501270129012B012D012F01310133013501370138013A013C013E014001420144014601480149014B014D014F01510153015501570159015B015D015F01610163016501670169016B016D016F0171017301750177017A017C017E-0180018301850188018C018D019201950199-019B019E01A101A301A501A801AA01AB01AD01B001B401B601B901BA01BD-01BF01C601C901CC01CE01D001D201D401D601D801DA01DC01DD01DF01E101E301E501E701E901EB01ED01EF01F001F301F501F901FB01FD01FF02010203020502070209020B020D020F02110213021502170219021B021D021F02210223022502270229022B022D022F02310233-0239023C023F0240024202470249024B024D024F-02930295-02AF037103730377037B-037D039003AC-03CE03D003D103D5-03D703D903DB03DD03DF03E103E303E503E703E903EB03ED03EF-03F303F503F803FB03FC0430-045F04610463046504670469046B046D046F04710473047504770479047B047D047F0481048B048D048F04910493049504970499049B049D049F04A104A304A504A704A904AB04AD04AF04B104B304B504B704B904BB04BD04BF04C204C404C604C804CA04CC04CE04CF04D104D304D504D704D904DB04DD04DF04E104E304E504E704E904EB04ED04EF04F104F304F504F704F904FB04FD04FF05010503050505070509050B050D050F05110513051505170519051B051D051F05210523052505270561-05871D00-1D2B1D6B-1D771D79-1D9A1E011E031E051E071E091E0B1E0D1E0F1E111E131E151E171E191E1B1E1D1E1F1E211E231E251E271E291E2B1E2D1E2F1E311E331E351E371E391E3B1E3D1E3F1E411E431E451E471E491E4B1E4D1E4F1E511E531E551E571E591E5B1E5D1E5F1E611E631E651E671E691E6B1E6D1E6F1E711E731E751E771E791E7B1E7D1E7F1E811E831E851E871E891E8B1E8D1E8F1E911E931E95-1E9D1E9F1EA11EA31EA51EA71EA91EAB1EAD1EAF1EB11EB31EB51EB71EB91EBB1EBD1EBF1EC11EC31EC51EC71EC91ECB1ECD1ECF1ED11ED31ED51ED71ED91EDB1EDD1EDF1EE11EE31EE51EE71EE91EEB1EED1EEF1EF11EF31EF51EF71EF91EFB1EFD1EFF-1F071F10-1F151F20-1F271F30-1F371F40-1F451F50-1F571F60-1F671F70-1F7D1F80-1F871F90-1F971FA0-1FA71FB0-1FB41FB61FB71FBE1FC2-1FC41FC61FC71FD0-1FD31FD61FD71FE0-1FE71FF2-1FF41FF61FF7210A210E210F2113212F21342139213C213D2146-2149214E21842C30-2C5E2C612C652C662C682C6A2C6C2C712C732C742C76-2C7B2C812C832C852C872C892C8B2C8D2C8F2C912C932C952C972C992C9B2C9D2C9F2CA12CA32CA52CA72CA92CAB2CAD2CAF2CB12CB32CB52CB72CB92CBB2CBD2CBF2CC12CC32CC52CC72CC92CCB2CCD2CCF2CD12CD32CD52CD72CD92CDB2CDD2CDF2CE12CE32CE42CEC2CEE2CF32D00-2D252D272D2DA641A643A645A647A649A64BA64DA64FA651A653A655A657A659A65BA65DA65FA661A663A665A667A669A66BA66DA681A683A685A687A689A68BA68DA68FA691A693A695A697A723A725A727A729A72BA72DA72F-A731A733A735A737A739A73BA73DA73FA741A743A745A747A749A74BA74DA74FA751A753A755A757A759A75BA75DA75FA761A763A765A767A769A76BA76DA76FA771-A778A77AA77CA77FA781A783A785A787A78CA78EA791A793A7A1A7A3A7A5A7A7A7A9A7FAFB00-FB06FB13-FB17FF41-FF5A",
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        Nl: "16EE-16F02160-21822185-218830073021-30293038-303AA6E6-A6EF",
        No: "00B200B300B900BC-00BE09F4-09F90B72-0B770BF0-0BF20C78-0C7E0D70-0D750F2A-0F331369-137C17F0-17F919DA20702074-20792080-20892150-215F21892460-249B24EA-24FF2776-27932CFD3192-31953220-32293248-324F3251-325F3280-328932B1-32BFA830-A835",
        P: "0021-00230025-002A002C-002F003A003B003F0040005B-005D005F007B007D00A100A700AB00B600B700BB00BF037E0387055A-055F0589058A05BE05C005C305C605F305F40609060A060C060D061B061E061F066A-066D06D40700-070D07F7-07F90830-083E085E0964096509700AF00DF40E4F0E5A0E5B0F04-0F120F140F3A-0F3D0F850FD0-0FD40FD90FDA104A-104F10FB1360-13681400166D166E169B169C16EB-16ED1735173617D4-17D617D8-17DA1800-180A194419451A1E1A1F1AA0-1AA61AA8-1AAD1B5A-1B601BFC-1BFF1C3B-1C3F1C7E1C7F1CC0-1CC71CD32010-20272030-20432045-20512053-205E207D207E208D208E2329232A2768-277527C527C627E6-27EF2983-299829D8-29DB29FC29FD2CF9-2CFC2CFE2CFF2D702E00-2E2E2E30-2E3B3001-30033008-30113014-301F3030303D30A030FBA4FEA4FFA60D-A60FA673A67EA6F2-A6F7A874-A877A8CEA8CFA8F8-A8FAA92EA92FA95FA9C1-A9CDA9DEA9DFAA5C-AA5FAADEAADFAAF0AAF1ABEBFD3EFD3FFE10-FE19FE30-FE52FE54-FE61FE63FE68FE6AFE6BFF01-FF03FF05-FF0AFF0C-FF0FFF1AFF1BFF1FFF20FF3B-FF3DFF3FFF5BFF5DFF5F-FF65",
        Pd: "002D058A05BE140018062010-20152E172E1A2E3A2E3B301C303030A0FE31FE32FE58FE63FF0D",
        Ps: "0028005B007B0F3A0F3C169B201A201E2045207D208D23292768276A276C276E27702772277427C527E627E827EA27EC27EE2983298529872989298B298D298F299129932995299729D829DA29FC2E222E242E262E283008300A300C300E3010301430163018301A301DFD3EFE17FE35FE37FE39FE3BFE3DFE3FFE41FE43FE47FE59FE5BFE5DFF08FF3BFF5BFF5FFF62",
        Pe: "0029005D007D0F3B0F3D169C2046207E208E232A2769276B276D276F27712773277527C627E727E927EB27ED27EF298429862988298A298C298E2990299229942996299829D929DB29FD2E232E252E272E293009300B300D300F3011301530173019301B301E301FFD3FFE18FE36FE38FE3AFE3CFE3EFE40FE42FE44FE48FE5AFE5CFE5EFF09FF3DFF5DFF60FF63",
        Pi: "00AB2018201B201C201F20392E022E042E092E0C2E1C2E20",
        Pf: "00BB2019201D203A2E032E052E0A2E0D2E1D2E21",
        Pc: "005F203F20402054FE33FE34FE4D-FE4FFF3F",
        Po: "0021-00230025-0027002A002C002E002F003A003B003F0040005C00A100A700B600B700BF037E0387055A-055F058905C005C305C605F305F40609060A060C060D061B061E061F066A-066D06D40700-070D07F7-07F90830-083E085E0964096509700AF00DF40E4F0E5A0E5B0F04-0F120F140F850FD0-0FD40FD90FDA104A-104F10FB1360-1368166D166E16EB-16ED1735173617D4-17D617D8-17DA1800-18051807-180A194419451A1E1A1F1AA0-1AA61AA8-1AAD1B5A-1B601BFC-1BFF1C3B-1C3F1C7E1C7F1CC0-1CC71CD3201620172020-20272030-2038203B-203E2041-20432047-205120532055-205E2CF9-2CFC2CFE2CFF2D702E002E012E06-2E082E0B2E0E-2E162E182E192E1B2E1E2E1F2E2A-2E2E2E30-2E393001-3003303D30FBA4FEA4FFA60D-A60FA673A67EA6F2-A6F7A874-A877A8CEA8CFA8F8-A8FAA92EA92FA95FA9C1-A9CDA9DEA9DFAA5C-AA5FAADEAADFAAF0AAF1ABEBFE10-FE16FE19FE30FE45FE46FE49-FE4CFE50-FE52FE54-FE57FE5F-FE61FE68FE6AFE6BFF01-FF03FF05-FF07FF0AFF0CFF0EFF0FFF1AFF1BFF1FFF20FF3CFF61FF64FF65",
        S: "0024002B003C-003E005E0060007C007E00A2-00A600A800A900AC00AE-00B100B400B800D700F702C2-02C502D2-02DF02E5-02EB02ED02EF-02FF03750384038503F60482058F0606-0608060B060E060F06DE06E906FD06FE07F609F209F309FA09FB0AF10B700BF3-0BFA0C7F0D790E3F0F01-0F030F130F15-0F170F1A-0F1F0F340F360F380FBE-0FC50FC7-0FCC0FCE0FCF0FD5-0FD8109E109F1390-139917DB194019DE-19FF1B61-1B6A1B74-1B7C1FBD1FBF-1FC11FCD-1FCF1FDD-1FDF1FED-1FEF1FFD1FFE20442052207A-207C208A-208C20A0-20B9210021012103-21062108210921142116-2118211E-2123212521272129212E213A213B2140-2144214A-214D214F2190-2328232B-23F32400-24262440-244A249C-24E92500-26FF2701-27672794-27C427C7-27E527F0-29822999-29D729DC-29FB29FE-2B4C2B50-2B592CE5-2CEA2E80-2E992E9B-2EF32F00-2FD52FF0-2FFB300430123013302030363037303E303F309B309C319031913196-319F31C0-31E33200-321E322A-324732503260-327F328A-32B032C0-32FE3300-33FF4DC0-4DFFA490-A4C6A700-A716A720A721A789A78AA828-A82BA836-A839AA77-AA79FB29FBB2-FBC1FDFCFDFDFE62FE64-FE66FE69FF04FF0BFF1C-FF1EFF3EFF40FF5CFF5EFFE0-FFE6FFE8-FFEEFFFCFFFD",
        Sm: "002B003C-003E007C007E00AC00B100D700F703F60606-060820442052207A-207C208A-208C21182140-2144214B2190-2194219A219B21A021A321A621AE21CE21CF21D221D421F4-22FF2308-230B23202321237C239B-23B323DC-23E125B725C125F8-25FF266F27C0-27C427C7-27E527F0-27FF2900-29822999-29D729DC-29FB29FE-2AFF2B30-2B442B47-2B4CFB29FE62FE64-FE66FF0BFF1C-FF1EFF5CFF5EFFE2FFE9-FFEC",
        Sc: "002400A2-00A5058F060B09F209F309FB0AF10BF90E3F17DB20A0-20B9A838FDFCFE69FF04FFE0FFE1FFE5FFE6",
        Sk: "005E006000A800AF00B400B802C2-02C502D2-02DF02E5-02EB02ED02EF-02FF0375038403851FBD1FBF-1FC11FCD-1FCF1FDD-1FDF1FED-1FEF1FFD1FFE309B309CA700-A716A720A721A789A78AFBB2-FBC1FF3EFF40FFE3",
        So: "00A600A900AE00B00482060E060F06DE06E906FD06FE07F609FA0B700BF3-0BF80BFA0C7F0D790F01-0F030F130F15-0F170F1A-0F1F0F340F360F380FBE-0FC50FC7-0FCC0FCE0FCF0FD5-0FD8109E109F1390-1399194019DE-19FF1B61-1B6A1B74-1B7C210021012103-210621082109211421162117211E-2123212521272129212E213A213B214A214C214D214F2195-2199219C-219F21A121A221A421A521A7-21AD21AF-21CD21D021D121D321D5-21F32300-2307230C-231F2322-2328232B-237B237D-239A23B4-23DB23E2-23F32400-24262440-244A249C-24E92500-25B625B8-25C025C2-25F72600-266E2670-26FF2701-27672794-27BF2800-28FF2B00-2B2F2B452B462B50-2B592CE5-2CEA2E80-2E992E9B-2EF32F00-2FD52FF0-2FFB300430123013302030363037303E303F319031913196-319F31C0-31E33200-321E322A-324732503260-327F328A-32B032C0-32FE3300-33FF4DC0-4DFFA490-A4C6A828-A82BA836A837A839AA77-AA79FDFDFFE4FFE8FFEDFFEEFFFCFFFD",
        Z: "002000A01680180E2000-200A20282029202F205F3000",
        Zs: "002000A01680180E2000-200A202F205F3000",
        Zl: "2028",
        Zp: "2029",
        C: "0000-001F007F-009F00AD03780379037F-0383038B038D03A20528-05300557055805600588058B-058E059005C8-05CF05EB-05EF05F5-0605061C061D06DD070E070F074B074C07B2-07BF07FB-07FF082E082F083F085C085D085F-089F08A108AD-08E308FF097809800984098D098E0991099209A909B109B3-09B509BA09BB09C509C609C909CA09CF-09D609D8-09DB09DE09E409E509FC-0A000A040A0B-0A0E0A110A120A290A310A340A370A3A0A3B0A3D0A43-0A460A490A4A0A4E-0A500A52-0A580A5D0A5F-0A650A76-0A800A840A8E0A920AA90AB10AB40ABA0ABB0AC60ACA0ACE0ACF0AD1-0ADF0AE40AE50AF2-0B000B040B0D0B0E0B110B120B290B310B340B3A0B3B0B450B460B490B4A0B4E-0B550B58-0B5B0B5E0B640B650B78-0B810B840B8B-0B8D0B910B96-0B980B9B0B9D0BA0-0BA20BA5-0BA70BAB-0BAD0BBA-0BBD0BC3-0BC50BC90BCE0BCF0BD1-0BD60BD8-0BE50BFB-0C000C040C0D0C110C290C340C3A-0C3C0C450C490C4E-0C540C570C5A-0C5F0C640C650C70-0C770C800C810C840C8D0C910CA90CB40CBA0CBB0CC50CC90CCE-0CD40CD7-0CDD0CDF0CE40CE50CF00CF3-0D010D040D0D0D110D3B0D3C0D450D490D4F-0D560D58-0D5F0D640D650D76-0D780D800D810D840D97-0D990DB20DBC0DBE0DBF0DC7-0DC90DCB-0DCE0DD50DD70DE0-0DF10DF5-0E000E3B-0E3E0E5C-0E800E830E850E860E890E8B0E8C0E8E-0E930E980EA00EA40EA60EA80EA90EAC0EBA0EBE0EBF0EC50EC70ECE0ECF0EDA0EDB0EE0-0EFF0F480F6D-0F700F980FBD0FCD0FDB-0FFF10C610C8-10CC10CE10CF1249124E124F12571259125E125F1289128E128F12B112B612B712BF12C112C612C712D7131113161317135B135C137D-137F139A-139F13F5-13FF169D-169F16F1-16FF170D1715-171F1737-173F1754-175F176D17711774-177F17DE17DF17EA-17EF17FA-17FF180F181A-181F1878-187F18AB-18AF18F6-18FF191D-191F192C-192F193C-193F1941-1943196E196F1975-197F19AC-19AF19CA-19CF19DB-19DD1A1C1A1D1A5F1A7D1A7E1A8A-1A8F1A9A-1A9F1AAE-1AFF1B4C-1B4F1B7D-1B7F1BF4-1BFB1C38-1C3A1C4A-1C4C1C80-1CBF1CC8-1CCF1CF7-1CFF1DE7-1DFB1F161F171F1E1F1F1F461F471F4E1F4F1F581F5A1F5C1F5E1F7E1F7F1FB51FC51FD41FD51FDC1FF01FF11FF51FFF200B-200F202A-202E2060-206F20722073208F209D-209F20BA-20CF20F1-20FF218A-218F23F4-23FF2427-243F244B-245F27002B4D-2B4F2B5A-2BFF2C2F2C5F2CF4-2CF82D262D28-2D2C2D2E2D2F2D68-2D6E2D71-2D7E2D97-2D9F2DA72DAF2DB72DBF2DC72DCF2DD72DDF2E3C-2E7F2E9A2EF4-2EFF2FD6-2FEF2FFC-2FFF3040309730983100-3104312E-3130318F31BB-31BF31E4-31EF321F32FF4DB6-4DBF9FCD-9FFFA48D-A48FA4C7-A4CFA62C-A63FA698-A69EA6F8-A6FFA78FA794-A79FA7AB-A7F7A82C-A82FA83A-A83FA878-A87FA8C5-A8CDA8DA-A8DFA8FC-A8FFA954-A95EA97D-A97FA9CEA9DA-A9DDA9E0-A9FFAA37-AA3FAA4EAA4FAA5AAA5BAA7C-AA7FAAC3-AADAAAF7-AB00AB07AB08AB0FAB10AB17-AB1FAB27AB2F-ABBFABEEABEFABFA-ABFFD7A4-D7AFD7C7-D7CAD7FC-F8FFFA6EFA6FFADA-FAFFFB07-FB12FB18-FB1CFB37FB3DFB3FFB42FB45FBC2-FBD2FD40-FD4FFD90FD91FDC8-FDEFFDFEFDFFFE1A-FE1FFE27-FE2FFE53FE67FE6C-FE6FFE75FEFD-FF00FFBF-FFC1FFC8FFC9FFD0FFD1FFD8FFD9FFDD-FFDFFFE7FFEF-FFFBFFFEFFFF",
        Cc: "0000-001F007F-009F",
        Cf: "00AD0600-060406DD070F200B-200F202A-202E2060-2064206A-206FFEFFFFF9-FFFB",
        Co: "E000-F8FF",
        Cs: "D800-DFFF",
        Cn: "03780379037F-0383038B038D03A20528-05300557055805600588058B-058E059005C8-05CF05EB-05EF05F5-05FF0605061C061D070E074B074C07B2-07BF07FB-07FF082E082F083F085C085D085F-089F08A108AD-08E308FF097809800984098D098E0991099209A909B109B3-09B509BA09BB09C509C609C909CA09CF-09D609D8-09DB09DE09E409E509FC-0A000A040A0B-0A0E0A110A120A290A310A340A370A3A0A3B0A3D0A43-0A460A490A4A0A4E-0A500A52-0A580A5D0A5F-0A650A76-0A800A840A8E0A920AA90AB10AB40ABA0ABB0AC60ACA0ACE0ACF0AD1-0ADF0AE40AE50AF2-0B000B040B0D0B0E0B110B120B290B310B340B3A0B3B0B450B460B490B4A0B4E-0B550B58-0B5B0B5E0B640B650B78-0B810B840B8B-0B8D0B910B96-0B980B9B0B9D0BA0-0BA20BA5-0BA70BAB-0BAD0BBA-0BBD0BC3-0BC50BC90BCE0BCF0BD1-0BD60BD8-0BE50BFB-0C000C040C0D0C110C290C340C3A-0C3C0C450C490C4E-0C540C570C5A-0C5F0C640C650C70-0C770C800C810C840C8D0C910CA90CB40CBA0CBB0CC50CC90CCE-0CD40CD7-0CDD0CDF0CE40CE50CF00CF3-0D010D040D0D0D110D3B0D3C0D450D490D4F-0D560D58-0D5F0D640D650D76-0D780D800D810D840D97-0D990DB20DBC0DBE0DBF0DC7-0DC90DCB-0DCE0DD50DD70DE0-0DF10DF5-0E000E3B-0E3E0E5C-0E800E830E850E860E890E8B0E8C0E8E-0E930E980EA00EA40EA60EA80EA90EAC0EBA0EBE0EBF0EC50EC70ECE0ECF0EDA0EDB0EE0-0EFF0F480F6D-0F700F980FBD0FCD0FDB-0FFF10C610C8-10CC10CE10CF1249124E124F12571259125E125F1289128E128F12B112B612B712BF12C112C612C712D7131113161317135B135C137D-137F139A-139F13F5-13FF169D-169F16F1-16FF170D1715-171F1737-173F1754-175F176D17711774-177F17DE17DF17EA-17EF17FA-17FF180F181A-181F1878-187F18AB-18AF18F6-18FF191D-191F192C-192F193C-193F1941-1943196E196F1975-197F19AC-19AF19CA-19CF19DB-19DD1A1C1A1D1A5F1A7D1A7E1A8A-1A8F1A9A-1A9F1AAE-1AFF1B4C-1B4F1B7D-1B7F1BF4-1BFB1C38-1C3A1C4A-1C4C1C80-1CBF1CC8-1CCF1CF7-1CFF1DE7-1DFB1F161F171F1E1F1F1F461F471F4E1F4F1F581F5A1F5C1F5E1F7E1F7F1FB51FC51FD41FD51FDC1FF01FF11FF51FFF2065-206920722073208F209D-209F20BA-20CF20F1-20FF218A-218F23F4-23FF2427-243F244B-245F27002B4D-2B4F2B5A-2BFF2C2F2C5F2CF4-2CF82D262D28-2D2C2D2E2D2F2D68-2D6E2D71-2D7E2D97-2D9F2DA72DAF2DB72DBF2DC72DCF2DD72DDF2E3C-2E7F2E9A2EF4-2EFF2FD6-2FEF2FFC-2FFF3040309730983100-3104312E-3130318F31BB-31BF31E4-31EF321F32FF4DB6-4DBF9FCD-9FFFA48D-A48FA4C7-A4CFA62C-A63FA698-A69EA6F8-A6FFA78FA794-A79FA7AB-A7F7A82C-A82FA83A-A83FA878-A87FA8C5-A8CDA8DA-A8DFA8FC-A8FFA954-A95EA97D-A97FA9CEA9DA-A9DDA9E0-A9FFAA37-AA3FAA4EAA4FAA5AAA5BAA7C-AA7FAAC3-AADAAAF7-AB00AB07AB08AB0FAB10AB17-AB1FAB27AB2F-ABBFABEEABEFABFA-ABFFD7A4-D7AFD7C7-D7CAD7FC-D7FFFA6EFA6FFADA-FAFFFB07-FB12FB18-FB1CFB37FB3DFB3FFB42FB45FBC2-FBD2FD40-FD4FFD90FD91FDC8-FDEFFDFEFDFFFE1A-FE1FFE27-FE2FFE53FE67FE6C-FE6FFE75FEFDFEFEFF00FFBF-FFC1FFC8FFC9FFD0FFD1FFD8FFD9FFDD-FFDFFFE7FFEF-FFF8FFFEFFFF"
    }, {
        //L: "Letter", // Included in the Unicode Base addon
        Ll: "Lowercase_Letter",
        Lu: "Uppercase_Letter",
        Lt: "Titlecase_Letter",
        Lm: "Modifier_Letter",
        Lo: "Other_Letter",
        M: "Mark",
        Mn: "Nonspacing_Mark",
        Mc: "Spacing_Mark",
        Me: "Enclosing_Mark",
        N: "Number",
        Nd: "Decimal_Number",
        Nl: "Letter_Number",
        No: "Other_Number",
        P: "Punctuation",
        Pd: "Dash_Punctuation",
        Ps: "Open_Punctuation",
        Pe: "Close_Punctuation",
        Pi: "Initial_Punctuation",
        Pf: "Final_Punctuation",
        Pc: "Connector_Punctuation",
        Po: "Other_Punctuation",
        S: "Symbol",
        Sm: "Math_Symbol",
        Sc: "Currency_Symbol",
        Sk: "Modifier_Symbol",
        So: "Other_Symbol",
        Z: "Separator",
        Zs: "Space_Separator",
        Zl: "Line_Separator",
        Zp: "Paragraph_Separator",
        C: "Other",
        Cc: "Control",
        Cf: "Format",
        Co: "Private_Use",
        Cs: "Surrogate",
        Cn: "Unassigned"
    });

}(XRegExp));


/***** unicode-scripts.js *****/

/*!
 * XRegExp Unicode Scripts v1.2.0
 * (c) 2010-2012 Steven Levithan <http://xregexp.com/>
 * MIT License
 * Uses Unicode 6.1 <http://unicode.org/>
 */

/**
 * Adds support for all Unicode scripts in the Basic Multilingual Plane (U+0000-U+FFFF).
 * E.g., `\p{Latin}`. Token names are case insensitive, and any spaces, hyphens, and underscores
 * are ignored.
 * @requires XRegExp, XRegExp Unicode Base
 */
(function (XRegExp) {
    "use strict";

    if (!XRegExp.addUnicodePackage) {
        throw new ReferenceError("Unicode Base must be loaded before Unicode Scripts");
    }

    XRegExp.install("extensibility");

    XRegExp.addUnicodePackage({
        Arabic: "0600-06040606-060B060D-061A061E0620-063F0641-064A0656-065E066A-066F0671-06DC06DE-06FF0750-077F08A008A2-08AC08E4-08FEFB50-FBC1FBD3-FD3DFD50-FD8FFD92-FDC7FDF0-FDFCFE70-FE74FE76-FEFC",
        Armenian: "0531-05560559-055F0561-0587058A058FFB13-FB17",
        Balinese: "1B00-1B4B1B50-1B7C",
        Bamum: "A6A0-A6F7",
        Batak: "1BC0-1BF31BFC-1BFF",
        Bengali: "0981-09830985-098C098F09900993-09A809AA-09B009B209B6-09B909BC-09C409C709C809CB-09CE09D709DC09DD09DF-09E309E6-09FB",
        Bopomofo: "02EA02EB3105-312D31A0-31BA",
        Braille: "2800-28FF",
        Buginese: "1A00-1A1B1A1E1A1F",
        Buhid: "1740-1753",
        Canadian_Aboriginal: "1400-167F18B0-18F5",
        Cham: "AA00-AA36AA40-AA4DAA50-AA59AA5C-AA5F",
        Cherokee: "13A0-13F4",
        Common: "0000-0040005B-0060007B-00A900AB-00B900BB-00BF00D700F702B9-02DF02E5-02E902EC-02FF0374037E038503870589060C061B061F06400660-066906DD096409650E3F0FD5-0FD810FB16EB-16ED173517361802180318051CD31CE11CE9-1CEC1CEE-1CF31CF51CF62000-200B200E-2064206A-20702074-207E2080-208E20A0-20B92100-21252127-2129212C-21312133-214D214F-215F21892190-23F32400-24262440-244A2460-26FF2701-27FF2900-2B4C2B50-2B592E00-2E3B2FF0-2FFB3000-300430063008-30203030-3037303C-303F309B309C30A030FB30FC3190-319F31C0-31E33220-325F327F-32CF3358-33FF4DC0-4DFFA700-A721A788-A78AA830-A839FD3EFD3FFDFDFE10-FE19FE30-FE52FE54-FE66FE68-FE6BFEFFFF01-FF20FF3B-FF40FF5B-FF65FF70FF9EFF9FFFE0-FFE6FFE8-FFEEFFF9-FFFD",
        Coptic: "03E2-03EF2C80-2CF32CF9-2CFF",
        Cyrillic: "0400-04840487-05271D2B1D782DE0-2DFFA640-A697A69F",
        Devanagari: "0900-09500953-09630966-09770979-097FA8E0-A8FB",
        Ethiopic: "1200-1248124A-124D1250-12561258125A-125D1260-1288128A-128D1290-12B012B2-12B512B8-12BE12C012C2-12C512C8-12D612D8-13101312-13151318-135A135D-137C1380-13992D80-2D962DA0-2DA62DA8-2DAE2DB0-2DB62DB8-2DBE2DC0-2DC62DC8-2DCE2DD0-2DD62DD8-2DDEAB01-AB06AB09-AB0EAB11-AB16AB20-AB26AB28-AB2E",
        Georgian: "10A0-10C510C710CD10D0-10FA10FC-10FF2D00-2D252D272D2D",
        Glagolitic: "2C00-2C2E2C30-2C5E",
        Greek: "0370-03730375-0377037A-037D038403860388-038A038C038E-03A103A3-03E103F0-03FF1D26-1D2A1D5D-1D611D66-1D6A1DBF1F00-1F151F18-1F1D1F20-1F451F48-1F4D1F50-1F571F591F5B1F5D1F5F-1F7D1F80-1FB41FB6-1FC41FC6-1FD31FD6-1FDB1FDD-1FEF1FF2-1FF41FF6-1FFE2126",
        Gujarati: "0A81-0A830A85-0A8D0A8F-0A910A93-0AA80AAA-0AB00AB20AB30AB5-0AB90ABC-0AC50AC7-0AC90ACB-0ACD0AD00AE0-0AE30AE6-0AF1",
        Gurmukhi: "0A01-0A030A05-0A0A0A0F0A100A13-0A280A2A-0A300A320A330A350A360A380A390A3C0A3E-0A420A470A480A4B-0A4D0A510A59-0A5C0A5E0A66-0A75",
        Han: "2E80-2E992E9B-2EF32F00-2FD5300530073021-30293038-303B3400-4DB54E00-9FCCF900-FA6DFA70-FAD9",
        Hangul: "1100-11FF302E302F3131-318E3200-321E3260-327EA960-A97CAC00-D7A3D7B0-D7C6D7CB-D7FBFFA0-FFBEFFC2-FFC7FFCA-FFCFFFD2-FFD7FFDA-FFDC",
        Hanunoo: "1720-1734",
        Hebrew: "0591-05C705D0-05EA05F0-05F4FB1D-FB36FB38-FB3CFB3EFB40FB41FB43FB44FB46-FB4F",
        Hiragana: "3041-3096309D-309F",
        Inherited: "0300-036F04850486064B-0655065F0670095109521CD0-1CD21CD4-1CE01CE2-1CE81CED1CF41DC0-1DE61DFC-1DFF200C200D20D0-20F0302A-302D3099309AFE00-FE0FFE20-FE26",
        Javanese: "A980-A9CDA9CF-A9D9A9DEA9DF",
        Kannada: "0C820C830C85-0C8C0C8E-0C900C92-0CA80CAA-0CB30CB5-0CB90CBC-0CC40CC6-0CC80CCA-0CCD0CD50CD60CDE0CE0-0CE30CE6-0CEF0CF10CF2",
        Katakana: "30A1-30FA30FD-30FF31F0-31FF32D0-32FE3300-3357FF66-FF6FFF71-FF9D",
        Kayah_Li: "A900-A92F",
        Khmer: "1780-17DD17E0-17E917F0-17F919E0-19FF",
        Lao: "0E810E820E840E870E880E8A0E8D0E94-0E970E99-0E9F0EA1-0EA30EA50EA70EAA0EAB0EAD-0EB90EBB-0EBD0EC0-0EC40EC60EC8-0ECD0ED0-0ED90EDC-0EDF",
        Latin: "0041-005A0061-007A00AA00BA00C0-00D600D8-00F600F8-02B802E0-02E41D00-1D251D2C-1D5C1D62-1D651D6B-1D771D79-1DBE1E00-1EFF2071207F2090-209C212A212B2132214E2160-21882C60-2C7FA722-A787A78B-A78EA790-A793A7A0-A7AAA7F8-A7FFFB00-FB06FF21-FF3AFF41-FF5A",
        Lepcha: "1C00-1C371C3B-1C491C4D-1C4F",
        Limbu: "1900-191C1920-192B1930-193B19401944-194F",
        Lisu: "A4D0-A4FF",
        Malayalam: "0D020D030D05-0D0C0D0E-0D100D12-0D3A0D3D-0D440D46-0D480D4A-0D4E0D570D60-0D630D66-0D750D79-0D7F",
        Mandaic: "0840-085B085E",
        Meetei_Mayek: "AAE0-AAF6ABC0-ABEDABF0-ABF9",
        Mongolian: "1800180118041806-180E1810-18191820-18771880-18AA",
        Myanmar: "1000-109FAA60-AA7B",
        New_Tai_Lue: "1980-19AB19B0-19C919D0-19DA19DE19DF",
        Nko: "07C0-07FA",
        Ogham: "1680-169C",
        Ol_Chiki: "1C50-1C7F",
        Oriya: "0B01-0B030B05-0B0C0B0F0B100B13-0B280B2A-0B300B320B330B35-0B390B3C-0B440B470B480B4B-0B4D0B560B570B5C0B5D0B5F-0B630B66-0B77",
        Phags_Pa: "A840-A877",
        Rejang: "A930-A953A95F",
        Runic: "16A0-16EA16EE-16F0",
        Samaritan: "0800-082D0830-083E",
        Saurashtra: "A880-A8C4A8CE-A8D9",
        Sinhala: "0D820D830D85-0D960D9A-0DB10DB3-0DBB0DBD0DC0-0DC60DCA0DCF-0DD40DD60DD8-0DDF0DF2-0DF4",
        Sundanese: "1B80-1BBF1CC0-1CC7",
        Syloti_Nagri: "A800-A82B",
        Syriac: "0700-070D070F-074A074D-074F",
        Tagalog: "1700-170C170E-1714",
        Tagbanwa: "1760-176C176E-177017721773",
        Tai_Le: "1950-196D1970-1974",
        Tai_Tham: "1A20-1A5E1A60-1A7C1A7F-1A891A90-1A991AA0-1AAD",
        Tai_Viet: "AA80-AAC2AADB-AADF",
        Tamil: "0B820B830B85-0B8A0B8E-0B900B92-0B950B990B9A0B9C0B9E0B9F0BA30BA40BA8-0BAA0BAE-0BB90BBE-0BC20BC6-0BC80BCA-0BCD0BD00BD70BE6-0BFA",
        Telugu: "0C01-0C030C05-0C0C0C0E-0C100C12-0C280C2A-0C330C35-0C390C3D-0C440C46-0C480C4A-0C4D0C550C560C580C590C60-0C630C66-0C6F0C78-0C7F",
        Thaana: "0780-07B1",
        Thai: "0E01-0E3A0E40-0E5B",
        Tibetan: "0F00-0F470F49-0F6C0F71-0F970F99-0FBC0FBE-0FCC0FCE-0FD40FD90FDA",
        Tifinagh: "2D30-2D672D6F2D702D7F",
        Vai: "A500-A62B",
        Yi: "A000-A48CA490-A4C6"
    });

}(XRegExp));


/***** unicode-blocks.js *****/

/*!
 * XRegExp Unicode Blocks v1.2.0
 * (c) 2010-2012 Steven Levithan <http://xregexp.com/>
 * MIT License
 * Uses Unicode 6.1 <http://unicode.org/>
 */

/**
 * Adds support for all Unicode blocks in the Basic Multilingual Plane (U+0000-U+FFFF). Unicode
 * blocks use the prefix "In". E.g., `\p{InBasicLatin}`. Token names are case insensitive, and any
 * spaces, hyphens, and underscores are ignored.
 * @requires XRegExp, XRegExp Unicode Base
 */
(function (XRegExp) {
    "use strict";

    if (!XRegExp.addUnicodePackage) {
        throw new ReferenceError("Unicode Base must be loaded before Unicode Blocks");
    }

    XRegExp.install("extensibility");

    XRegExp.addUnicodePackage({
        InBasic_Latin: "0000-007F",
        InLatin_1_Supplement: "0080-00FF",
        InLatin_Extended_A: "0100-017F",
        InLatin_Extended_B: "0180-024F",
        InIPA_Extensions: "0250-02AF",
        InSpacing_Modifier_Letters: "02B0-02FF",
        InCombining_Diacritical_Marks: "0300-036F",
        InGreek_and_Coptic: "0370-03FF",
        InCyrillic: "0400-04FF",
        InCyrillic_Supplement: "0500-052F",
        InArmenian: "0530-058F",
        InHebrew: "0590-05FF",
        InArabic: "0600-06FF",
        InSyriac: "0700-074F",
        InArabic_Supplement: "0750-077F",
        InThaana: "0780-07BF",
        InNKo: "07C0-07FF",
        InSamaritan: "0800-083F",
        InMandaic: "0840-085F",
        InArabic_Extended_A: "08A0-08FF",
        InDevanagari: "0900-097F",
        InBengali: "0980-09FF",
        InGurmukhi: "0A00-0A7F",
        InGujarati: "0A80-0AFF",
        InOriya: "0B00-0B7F",
        InTamil: "0B80-0BFF",
        InTelugu: "0C00-0C7F",
        InKannada: "0C80-0CFF",
        InMalayalam: "0D00-0D7F",
        InSinhala: "0D80-0DFF",
        InThai: "0E00-0E7F",
        InLao: "0E80-0EFF",
        InTibetan: "0F00-0FFF",
        InMyanmar: "1000-109F",
        InGeorgian: "10A0-10FF",
        InHangul_Jamo: "1100-11FF",
        InEthiopic: "1200-137F",
        InEthiopic_Supplement: "1380-139F",
        InCherokee: "13A0-13FF",
        InUnified_Canadian_Aboriginal_Syllabics: "1400-167F",
        InOgham: "1680-169F",
        InRunic: "16A0-16FF",
        InTagalog: "1700-171F",
        InHanunoo: "1720-173F",
        InBuhid: "1740-175F",
        InTagbanwa: "1760-177F",
        InKhmer: "1780-17FF",
        InMongolian: "1800-18AF",
        InUnified_Canadian_Aboriginal_Syllabics_Extended: "18B0-18FF",
        InLimbu: "1900-194F",
        InTai_Le: "1950-197F",
        InNew_Tai_Lue: "1980-19DF",
        InKhmer_Symbols: "19E0-19FF",
        InBuginese: "1A00-1A1F",
        InTai_Tham: "1A20-1AAF",
        InBalinese: "1B00-1B7F",
        InSundanese: "1B80-1BBF",
        InBatak: "1BC0-1BFF",
        InLepcha: "1C00-1C4F",
        InOl_Chiki: "1C50-1C7F",
        InSundanese_Supplement: "1CC0-1CCF",
        InVedic_Extensions: "1CD0-1CFF",
        InPhonetic_Extensions: "1D00-1D7F",
        InPhonetic_Extensions_Supplement: "1D80-1DBF",
        InCombining_Diacritical_Marks_Supplement: "1DC0-1DFF",
        InLatin_Extended_Additional: "1E00-1EFF",
        InGreek_Extended: "1F00-1FFF",
        InGeneral_Punctuation: "2000-206F",
        InSuperscripts_and_Subscripts: "2070-209F",
        InCurrency_Symbols: "20A0-20CF",
        InCombining_Diacritical_Marks_for_Symbols: "20D0-20FF",
        InLetterlike_Symbols: "2100-214F",
        InNumber_Forms: "2150-218F",
        InArrows: "2190-21FF",
        InMathematical_Operators: "2200-22FF",
        InMiscellaneous_Technical: "2300-23FF",
        InControl_Pictures: "2400-243F",
        InOptical_Character_Recognition: "2440-245F",
        InEnclosed_Alphanumerics: "2460-24FF",
        InBox_Drawing: "2500-257F",
        InBlock_Elements: "2580-259F",
        InGeometric_Shapes: "25A0-25FF",
        InMiscellaneous_Symbols: "2600-26FF",
        InDingbats: "2700-27BF",
        InMiscellaneous_Mathematical_Symbols_A: "27C0-27EF",
        InSupplemental_Arrows_A: "27F0-27FF",
        InBraille_Patterns: "2800-28FF",
        InSupplemental_Arrows_B: "2900-297F",
        InMiscellaneous_Mathematical_Symbols_B: "2980-29FF",
        InSupplemental_Mathematical_Operators: "2A00-2AFF",
        InMiscellaneous_Symbols_and_Arrows: "2B00-2BFF",
        InGlagolitic: "2C00-2C5F",
        InLatin_Extended_C: "2C60-2C7F",
        InCoptic: "2C80-2CFF",
        InGeorgian_Supplement: "2D00-2D2F",
        InTifinagh: "2D30-2D7F",
        InEthiopic_Extended: "2D80-2DDF",
        InCyrillic_Extended_A: "2DE0-2DFF",
        InSupplemental_Punctuation: "2E00-2E7F",
        InCJK_Radicals_Supplement: "2E80-2EFF",
        InKangxi_Radicals: "2F00-2FDF",
        InIdeographic_Description_Characters: "2FF0-2FFF",
        InCJK_Symbols_and_Punctuation: "3000-303F",
        InHiragana: "3040-309F",
        InKatakana: "30A0-30FF",
        InBopomofo: "3100-312F",
        InHangul_Compatibility_Jamo: "3130-318F",
        InKanbun: "3190-319F",
        InBopomofo_Extended: "31A0-31BF",
        InCJK_Strokes: "31C0-31EF",
        InKatakana_Phonetic_Extensions: "31F0-31FF",
        InEnclosed_CJK_Letters_and_Months: "3200-32FF",
        InCJK_Compatibility: "3300-33FF",
        InCJK_Unified_Ideographs_Extension_A: "3400-4DBF",
        InYijing_Hexagram_Symbols: "4DC0-4DFF",
        InCJK_Unified_Ideographs: "4E00-9FFF",
        InYi_Syllables: "A000-A48F",
        InYi_Radicals: "A490-A4CF",
        InLisu: "A4D0-A4FF",
        InVai: "A500-A63F",
        InCyrillic_Extended_B: "A640-A69F",
        InBamum: "A6A0-A6FF",
        InModifier_Tone_Letters: "A700-A71F",
        InLatin_Extended_D: "A720-A7FF",
        InSyloti_Nagri: "A800-A82F",
        InCommon_Indic_Number_Forms: "A830-A83F",
        InPhags_pa: "A840-A87F",
        InSaurashtra: "A880-A8DF",
        InDevanagari_Extended: "A8E0-A8FF",
        InKayah_Li: "A900-A92F",
        InRejang: "A930-A95F",
        InHangul_Jamo_Extended_A: "A960-A97F",
        InJavanese: "A980-A9DF",
        InCham: "AA00-AA5F",
        InMyanmar_Extended_A: "AA60-AA7F",
        InTai_Viet: "AA80-AADF",
        InMeetei_Mayek_Extensions: "AAE0-AAFF",
        InEthiopic_Extended_A: "AB00-AB2F",
        InMeetei_Mayek: "ABC0-ABFF",
        InHangul_Syllables: "AC00-D7AF",
        InHangul_Jamo_Extended_B: "D7B0-D7FF",
        InHigh_Surrogates: "D800-DB7F",
        InHigh_Private_Use_Surrogates: "DB80-DBFF",
        InLow_Surrogates: "DC00-DFFF",
        InPrivate_Use_Area: "E000-F8FF",
        InCJK_Compatibility_Ideographs: "F900-FAFF",
        InAlphabetic_Presentation_Forms: "FB00-FB4F",
        InArabic_Presentation_Forms_A: "FB50-FDFF",
        InVariation_Selectors: "FE00-FE0F",
        InVertical_Forms: "FE10-FE1F",
        InCombining_Half_Marks: "FE20-FE2F",
        InCJK_Compatibility_Forms: "FE30-FE4F",
        InSmall_Form_Variants: "FE50-FE6F",
        InArabic_Presentation_Forms_B: "FE70-FEFF",
        InHalfwidth_and_Fullwidth_Forms: "FF00-FFEF",
        InSpecials: "FFF0-FFFF"
    });

}(XRegExp));


/***** unicode-properties.js *****/

/*!
 * XRegExp Unicode Properties v1.0.0
 * (c) 2012 Steven Levithan <http://xregexp.com/>
 * MIT License
 * Uses Unicode 6.1 <http://unicode.org/>
 */

/**
 * Adds Unicode properties necessary to meet Level 1 Unicode support (detailed in UTS#18 RL1.2).
 * Includes code points from the Basic Multilingual Plane (U+0000-U+FFFF) only. Token names are
 * case insensitive, and any spaces, hyphens, and underscores are ignored.
 * @requires XRegExp, XRegExp Unicode Base
 */
(function (XRegExp) {
    "use strict";

    if (!XRegExp.addUnicodePackage) {
        throw new ReferenceError("Unicode Base must be loaded before Unicode Properties");
    }

    XRegExp.install("extensibility");

    XRegExp.addUnicodePackage({
        Alphabetic: "0041-005A0061-007A00AA00B500BA00C0-00D600D8-00F600F8-02C102C6-02D102E0-02E402EC02EE03450370-037403760377037A-037D03860388-038A038C038E-03A103A3-03F503F7-0481048A-05270531-055605590561-058705B0-05BD05BF05C105C205C405C505C705D0-05EA05F0-05F20610-061A0620-06570659-065F066E-06D306D5-06DC06E1-06E806ED-06EF06FA-06FC06FF0710-073F074D-07B107CA-07EA07F407F507FA0800-0817081A-082C0840-085808A008A2-08AC08E4-08E908F0-08FE0900-093B093D-094C094E-09500955-09630971-09770979-097F0981-09830985-098C098F09900993-09A809AA-09B009B209B6-09B909BD-09C409C709C809CB09CC09CE09D709DC09DD09DF-09E309F009F10A01-0A030A05-0A0A0A0F0A100A13-0A280A2A-0A300A320A330A350A360A380A390A3E-0A420A470A480A4B0A4C0A510A59-0A5C0A5E0A70-0A750A81-0A830A85-0A8D0A8F-0A910A93-0AA80AAA-0AB00AB20AB30AB5-0AB90ABD-0AC50AC7-0AC90ACB0ACC0AD00AE0-0AE30B01-0B030B05-0B0C0B0F0B100B13-0B280B2A-0B300B320B330B35-0B390B3D-0B440B470B480B4B0B4C0B560B570B5C0B5D0B5F-0B630B710B820B830B85-0B8A0B8E-0B900B92-0B950B990B9A0B9C0B9E0B9F0BA30BA40BA8-0BAA0BAE-0BB90BBE-0BC20BC6-0BC80BCA-0BCC0BD00BD70C01-0C030C05-0C0C0C0E-0C100C12-0C280C2A-0C330C35-0C390C3D-0C440C46-0C480C4A-0C4C0C550C560C580C590C60-0C630C820C830C85-0C8C0C8E-0C900C92-0CA80CAA-0CB30CB5-0CB90CBD-0CC40CC6-0CC80CCA-0CCC0CD50CD60CDE0CE0-0CE30CF10CF20D020D030D05-0D0C0D0E-0D100D12-0D3A0D3D-0D440D46-0D480D4A-0D4C0D4E0D570D60-0D630D7A-0D7F0D820D830D85-0D960D9A-0DB10DB3-0DBB0DBD0DC0-0DC60DCF-0DD40DD60DD8-0DDF0DF20DF30E01-0E3A0E40-0E460E4D0E810E820E840E870E880E8A0E8D0E94-0E970E99-0E9F0EA1-0EA30EA50EA70EAA0EAB0EAD-0EB90EBB-0EBD0EC0-0EC40EC60ECD0EDC-0EDF0F000F40-0F470F49-0F6C0F71-0F810F88-0F970F99-0FBC1000-10361038103B-103F1050-10621065-1068106E-1086108E109C109D10A0-10C510C710CD10D0-10FA10FC-1248124A-124D1250-12561258125A-125D1260-1288128A-128D1290-12B012B2-12B512B8-12BE12C012C2-12C512C8-12D612D8-13101312-13151318-135A135F1380-138F13A0-13F41401-166C166F-167F1681-169A16A0-16EA16EE-16F01700-170C170E-17131720-17331740-17531760-176C176E-1770177217731780-17B317B6-17C817D717DC1820-18771880-18AA18B0-18F51900-191C1920-192B1930-19381950-196D1970-19741980-19AB19B0-19C91A00-1A1B1A20-1A5E1A61-1A741AA71B00-1B331B35-1B431B45-1B4B1B80-1BA91BAC-1BAF1BBA-1BE51BE7-1BF11C00-1C351C4D-1C4F1C5A-1C7D1CE9-1CEC1CEE-1CF31CF51CF61D00-1DBF1E00-1F151F18-1F1D1F20-1F451F48-1F4D1F50-1F571F591F5B1F5D1F5F-1F7D1F80-1FB41FB6-1FBC1FBE1FC2-1FC41FC6-1FCC1FD0-1FD31FD6-1FDB1FE0-1FEC1FF2-1FF41FF6-1FFC2071207F2090-209C21022107210A-211321152119-211D212421262128212A-212D212F-2139213C-213F2145-2149214E2160-218824B6-24E92C00-2C2E2C30-2C5E2C60-2CE42CEB-2CEE2CF22CF32D00-2D252D272D2D2D30-2D672D6F2D80-2D962DA0-2DA62DA8-2DAE2DB0-2DB62DB8-2DBE2DC0-2DC62DC8-2DCE2DD0-2DD62DD8-2DDE2DE0-2DFF2E2F3005-30073021-30293031-30353038-303C3041-3096309D-309F30A1-30FA30FC-30FF3105-312D3131-318E31A0-31BA31F0-31FF3400-4DB54E00-9FCCA000-A48CA4D0-A4FDA500-A60CA610-A61FA62AA62BA640-A66EA674-A67BA67F-A697A69F-A6EFA717-A71FA722-A788A78B-A78EA790-A793A7A0-A7AAA7F8-A801A803-A805A807-A80AA80C-A827A840-A873A880-A8C3A8F2-A8F7A8FBA90A-A92AA930-A952A960-A97CA980-A9B2A9B4-A9BFA9CFAA00-AA36AA40-AA4DAA60-AA76AA7AAA80-AABEAAC0AAC2AADB-AADDAAE0-AAEFAAF2-AAF5AB01-AB06AB09-AB0EAB11-AB16AB20-AB26AB28-AB2EABC0-ABEAAC00-D7A3D7B0-D7C6D7CB-D7FBF900-FA6DFA70-FAD9FB00-FB06FB13-FB17FB1D-FB28FB2A-FB36FB38-FB3CFB3EFB40FB41FB43FB44FB46-FBB1FBD3-FD3DFD50-FD8FFD92-FDC7FDF0-FDFBFE70-FE74FE76-FEFCFF21-FF3AFF41-FF5AFF66-FFBEFFC2-FFC7FFCA-FFCFFFD2-FFD7FFDA-FFDC",
        Uppercase: "0041-005A00C0-00D600D8-00DE01000102010401060108010A010C010E01100112011401160118011A011C011E01200122012401260128012A012C012E01300132013401360139013B013D013F0141014301450147014A014C014E01500152015401560158015A015C015E01600162016401660168016A016C016E017001720174017601780179017B017D018101820184018601870189-018B018E-0191019301940196-0198019C019D019F01A001A201A401A601A701A901AC01AE01AF01B1-01B301B501B701B801BC01C401C701CA01CD01CF01D101D301D501D701D901DB01DE01E001E201E401E601E801EA01EC01EE01F101F401F6-01F801FA01FC01FE02000202020402060208020A020C020E02100212021402160218021A021C021E02200222022402260228022A022C022E02300232023A023B023D023E02410243-02460248024A024C024E03700372037603860388-038A038C038E038F0391-03A103A3-03AB03CF03D2-03D403D803DA03DC03DE03E003E203E403E603E803EA03EC03EE03F403F703F903FA03FD-042F04600462046404660468046A046C046E04700472047404760478047A047C047E0480048A048C048E04900492049404960498049A049C049E04A004A204A404A604A804AA04AC04AE04B004B204B404B604B804BA04BC04BE04C004C104C304C504C704C904CB04CD04D004D204D404D604D804DA04DC04DE04E004E204E404E604E804EA04EC04EE04F004F204F404F604F804FA04FC04FE05000502050405060508050A050C050E05100512051405160518051A051C051E05200522052405260531-055610A0-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-1F0F1F18-1F1D1F28-1F2F1F38-1F3F1F48-1F4D1F591F5B1F5D1F5F1F68-1F6F1FB8-1FBB1FC8-1FCB1FD8-1FDB1FE8-1FEC1FF8-1FFB21022107210B-210D2110-211221152119-211D212421262128212A-212D2130-2133213E213F21452160-216F218324B6-24CF2C00-2C2E2C602C62-2C642C672C692C6B2C6D-2C702C722C752C7E-2C802C822C842C862C882C8A2C8C2C8E2C902C922C942C962C982C9A2C9C2C9E2CA02CA22CA42CA62CA82CAA2CAC2CAE2CB02CB22CB42CB62CB82CBA2CBC2CBE2CC02CC22CC42CC62CC82CCA2CCC2CCE2CD02CD22CD42CD62CD82CDA2CDC2CDE2CE02CE22CEB2CED2CF2A640A642A644A646A648A64AA64CA64EA650A652A654A656A658A65AA65CA65EA660A662A664A666A668A66AA66CA680A682A684A686A688A68AA68CA68EA690A692A694A696A722A724A726A728A72AA72CA72EA732A734A736A738A73AA73CA73EA740A742A744A746A748A74AA74CA74EA750A752A754A756A758A75AA75CA75EA760A762A764A766A768A76AA76CA76EA779A77BA77DA77EA780A782A784A786A78BA78DA790A792A7A0A7A2A7A4A7A6A7A8A7AAFF21-FF3A",
        Lowercase: "0061-007A00AA00B500BA00DF-00F600F8-00FF01010103010501070109010B010D010F01110113011501170119011B011D011F01210123012501270129012B012D012F01310133013501370138013A013C013E014001420144014601480149014B014D014F01510153015501570159015B015D015F01610163016501670169016B016D016F0171017301750177017A017C017E-0180018301850188018C018D019201950199-019B019E01A101A301A501A801AA01AB01AD01B001B401B601B901BA01BD-01BF01C601C901CC01CE01D001D201D401D601D801DA01DC01DD01DF01E101E301E501E701E901EB01ED01EF01F001F301F501F901FB01FD01FF02010203020502070209020B020D020F02110213021502170219021B021D021F02210223022502270229022B022D022F02310233-0239023C023F0240024202470249024B024D024F-02930295-02B802C002C102E0-02E40345037103730377037A-037D039003AC-03CE03D003D103D5-03D703D903DB03DD03DF03E103E303E503E703E903EB03ED03EF-03F303F503F803FB03FC0430-045F04610463046504670469046B046D046F04710473047504770479047B047D047F0481048B048D048F04910493049504970499049B049D049F04A104A304A504A704A904AB04AD04AF04B104B304B504B704B904BB04BD04BF04C204C404C604C804CA04CC04CE04CF04D104D304D504D704D904DB04DD04DF04E104E304E504E704E904EB04ED04EF04F104F304F504F704F904FB04FD04FF05010503050505070509050B050D050F05110513051505170519051B051D051F05210523052505270561-05871D00-1DBF1E011E031E051E071E091E0B1E0D1E0F1E111E131E151E171E191E1B1E1D1E1F1E211E231E251E271E291E2B1E2D1E2F1E311E331E351E371E391E3B1E3D1E3F1E411E431E451E471E491E4B1E4D1E4F1E511E531E551E571E591E5B1E5D1E5F1E611E631E651E671E691E6B1E6D1E6F1E711E731E751E771E791E7B1E7D1E7F1E811E831E851E871E891E8B1E8D1E8F1E911E931E95-1E9D1E9F1EA11EA31EA51EA71EA91EAB1EAD1EAF1EB11EB31EB51EB71EB91EBB1EBD1EBF1EC11EC31EC51EC71EC91ECB1ECD1ECF1ED11ED31ED51ED71ED91EDB1EDD1EDF1EE11EE31EE51EE71EE91EEB1EED1EEF1EF11EF31EF51EF71EF91EFB1EFD1EFF-1F071F10-1F151F20-1F271F30-1F371F40-1F451F50-1F571F60-1F671F70-1F7D1F80-1F871F90-1F971FA0-1FA71FB0-1FB41FB61FB71FBE1FC2-1FC41FC61FC71FD0-1FD31FD61FD71FE0-1FE71FF2-1FF41FF61FF72071207F2090-209C210A210E210F2113212F21342139213C213D2146-2149214E2170-217F218424D0-24E92C30-2C5E2C612C652C662C682C6A2C6C2C712C732C742C76-2C7D2C812C832C852C872C892C8B2C8D2C8F2C912C932C952C972C992C9B2C9D2C9F2CA12CA32CA52CA72CA92CAB2CAD2CAF2CB12CB32CB52CB72CB92CBB2CBD2CBF2CC12CC32CC52CC72CC92CCB2CCD2CCF2CD12CD32CD52CD72CD92CDB2CDD2CDF2CE12CE32CE42CEC2CEE2CF32D00-2D252D272D2DA641A643A645A647A649A64BA64DA64FA651A653A655A657A659A65BA65DA65FA661A663A665A667A669A66BA66DA681A683A685A687A689A68BA68DA68FA691A693A695A697A723A725A727A729A72BA72DA72F-A731A733A735A737A739A73BA73DA73FA741A743A745A747A749A74BA74DA74FA751A753A755A757A759A75BA75DA75FA761A763A765A767A769A76BA76DA76F-A778A77AA77CA77FA781A783A785A787A78CA78EA791A793A7A1A7A3A7A5A7A7A7A9A7F8-A7FAFB00-FB06FB13-FB17FF41-FF5A",
        White_Space: "0009-000D0020008500A01680180E2000-200A20282029202F205F3000",
        Noncharacter_Code_Point: "FDD0-FDEFFFFEFFFF",
        Default_Ignorable_Code_Point: "00AD034F115F116017B417B5180B-180D200B-200F202A-202E2060-206F3164FE00-FE0FFEFFFFA0FFF0-FFF8",
        // \p{Any} matches a code unit. To match any code point via surrogate pairs, use (?:[\0-\uD7FF\uDC00-\uFFFF]|[\uD800-\uDBFF][\uDC00-\uDFFF]|[\uD800-\uDBFF])
        Any: "0000-FFFF", // \p{^Any} compiles to [^\u0000-\uFFFF]; [\p{^Any}] to []
        Ascii: "0000-007F",
        // \p{Assigned} is equivalent to \p{^Cn}
        //Assigned: XRegExp("[\\p{^Cn}]").source.replace(/[[\]]|\\u/g, "") // Negation inside a character class triggers inversion
        Assigned: "0000-0377037A-037E0384-038A038C038E-03A103A3-05270531-05560559-055F0561-05870589058A058F0591-05C705D0-05EA05F0-05F40600-06040606-061B061E-070D070F-074A074D-07B107C0-07FA0800-082D0830-083E0840-085B085E08A008A2-08AC08E4-08FE0900-09770979-097F0981-09830985-098C098F09900993-09A809AA-09B009B209B6-09B909BC-09C409C709C809CB-09CE09D709DC09DD09DF-09E309E6-09FB0A01-0A030A05-0A0A0A0F0A100A13-0A280A2A-0A300A320A330A350A360A380A390A3C0A3E-0A420A470A480A4B-0A4D0A510A59-0A5C0A5E0A66-0A750A81-0A830A85-0A8D0A8F-0A910A93-0AA80AAA-0AB00AB20AB30AB5-0AB90ABC-0AC50AC7-0AC90ACB-0ACD0AD00AE0-0AE30AE6-0AF10B01-0B030B05-0B0C0B0F0B100B13-0B280B2A-0B300B320B330B35-0B390B3C-0B440B470B480B4B-0B4D0B560B570B5C0B5D0B5F-0B630B66-0B770B820B830B85-0B8A0B8E-0B900B92-0B950B990B9A0B9C0B9E0B9F0BA30BA40BA8-0BAA0BAE-0BB90BBE-0BC20BC6-0BC80BCA-0BCD0BD00BD70BE6-0BFA0C01-0C030C05-0C0C0C0E-0C100C12-0C280C2A-0C330C35-0C390C3D-0C440C46-0C480C4A-0C4D0C550C560C580C590C60-0C630C66-0C6F0C78-0C7F0C820C830C85-0C8C0C8E-0C900C92-0CA80CAA-0CB30CB5-0CB90CBC-0CC40CC6-0CC80CCA-0CCD0CD50CD60CDE0CE0-0CE30CE6-0CEF0CF10CF20D020D030D05-0D0C0D0E-0D100D12-0D3A0D3D-0D440D46-0D480D4A-0D4E0D570D60-0D630D66-0D750D79-0D7F0D820D830D85-0D960D9A-0DB10DB3-0DBB0DBD0DC0-0DC60DCA0DCF-0DD40DD60DD8-0DDF0DF2-0DF40E01-0E3A0E3F-0E5B0E810E820E840E870E880E8A0E8D0E94-0E970E99-0E9F0EA1-0EA30EA50EA70EAA0EAB0EAD-0EB90EBB-0EBD0EC0-0EC40EC60EC8-0ECD0ED0-0ED90EDC-0EDF0F00-0F470F49-0F6C0F71-0F970F99-0FBC0FBE-0FCC0FCE-0FDA1000-10C510C710CD10D0-1248124A-124D1250-12561258125A-125D1260-1288128A-128D1290-12B012B2-12B512B8-12BE12C012C2-12C512C8-12D612D8-13101312-13151318-135A135D-137C1380-139913A0-13F41400-169C16A0-16F01700-170C170E-17141720-17361740-17531760-176C176E-1770177217731780-17DD17E0-17E917F0-17F91800-180E1810-18191820-18771880-18AA18B0-18F51900-191C1920-192B1930-193B19401944-196D1970-19741980-19AB19B0-19C919D0-19DA19DE-1A1B1A1E-1A5E1A60-1A7C1A7F-1A891A90-1A991AA0-1AAD1B00-1B4B1B50-1B7C1B80-1BF31BFC-1C371C3B-1C491C4D-1C7F1CC0-1CC71CD0-1CF61D00-1DE61DFC-1F151F18-1F1D1F20-1F451F48-1F4D1F50-1F571F591F5B1F5D1F5F-1F7D1F80-1FB41FB6-1FC41FC6-1FD31FD6-1FDB1FDD-1FEF1FF2-1FF41FF6-1FFE2000-2064206A-20712074-208E2090-209C20A0-20B920D0-20F02100-21892190-23F32400-24262440-244A2460-26FF2701-2B4C2B50-2B592C00-2C2E2C30-2C5E2C60-2CF32CF9-2D252D272D2D2D30-2D672D6F2D702D7F-2D962DA0-2DA62DA8-2DAE2DB0-2DB62DB8-2DBE2DC0-2DC62DC8-2DCE2DD0-2DD62DD8-2DDE2DE0-2E3B2E80-2E992E9B-2EF32F00-2FD52FF0-2FFB3000-303F3041-30963099-30FF3105-312D3131-318E3190-31BA31C0-31E331F0-321E3220-32FE3300-4DB54DC0-9FCCA000-A48CA490-A4C6A4D0-A62BA640-A697A69F-A6F7A700-A78EA790-A793A7A0-A7AAA7F8-A82BA830-A839A840-A877A880-A8C4A8CE-A8D9A8E0-A8FBA900-A953A95F-A97CA980-A9CDA9CF-A9D9A9DEA9DFAA00-AA36AA40-AA4DAA50-AA59AA5C-AA7BAA80-AAC2AADB-AAF6AB01-AB06AB09-AB0EAB11-AB16AB20-AB26AB28-AB2EABC0-ABEDABF0-ABF9AC00-D7A3D7B0-D7C6D7CB-D7FBD800-FA6DFA70-FAD9FB00-FB06FB13-FB17FB1D-FB36FB38-FB3CFB3EFB40FB41FB43FB44FB46-FBC1FBD3-FD3FFD50-FD8FFD92-FDC7FDF0-FDFDFE00-FE19FE20-FE26FE30-FE52FE54-FE66FE68-FE6BFE70-FE74FE76-FEFCFEFFFF01-FFBEFFC2-FFC7FFCA-FFCFFFD2-FFD7FFDA-FFDCFFE0-FFE6FFE8-FFEEFFF9-FFFD"
    });

}(XRegExp));


/***** matchrecursive.js *****/

/*!
 * XRegExp.matchRecursive v0.2.0
 * (c) 2009-2012 Steven Levithan <http://xregexp.com/>
 * MIT License
 */

(function (XRegExp) {
    "use strict";

/**
 * Returns a match detail object composed of the provided values.
 * @private
 */
    function row(value, name, start, end) {
        return {value:value, name:name, start:start, end:end};
    }

/**
 * Returns an array of match strings between outermost left and right delimiters, or an array of
 * objects with detailed match parts and position data. An error is thrown if delimiters are
 * unbalanced within the data.
 * @memberOf XRegExp
 * @param {String} str String to search.
 * @param {String} left Left delimiter as an XRegExp pattern.
 * @param {String} right Right delimiter as an XRegExp pattern.
 * @param {String} [flags] Flags for the left and right delimiters. Use any of: `gimnsxy`.
 * @param {Object} [options] Lets you specify `valueNames` and `escapeChar` options.
 * @returns {Array} Array of matches, or an empty array.
 * @example
 *
 * // Basic usage
 * var str = '(t((e))s)t()(ing)';
 * XRegExp.matchRecursive(str, '\\(', '\\)', 'g');
 * // -> ['t((e))s', '', 'ing']
 *
 * // Extended information mode with valueNames
 * str = 'Here is <div> <div>an</div></div> example';
 * XRegExp.matchRecursive(str, '<div\\s*>', '</div>', 'gi', {
 *   valueNames: ['between', 'left', 'match', 'right']
 * });
 * // -> [
 * // {name: 'between', value: 'Here is ',       start: 0,  end: 8},
 * // {name: 'left',    value: '<div>',          start: 8,  end: 13},
 * // {name: 'match',   value: ' <div>an</div>', start: 13, end: 27},
 * // {name: 'right',   value: '</div>',         start: 27, end: 33},
 * // {name: 'between', value: ' example',       start: 33, end: 41}
 * // ]
 *
 * // Omitting unneeded parts with null valueNames, and using escapeChar
 * str = '...{1}\\{{function(x,y){return y+x;}}';
 * XRegExp.matchRecursive(str, '{', '}', 'g', {
 *   valueNames: ['literal', null, 'value', null],
 *   escapeChar: '\\'
 * });
 * // -> [
 * // {name: 'literal', value: '...', start: 0, end: 3},
 * // {name: 'value',   value: '1',   start: 4, end: 5},
 * // {name: 'literal', value: '\\{', start: 6, end: 8},
 * // {name: 'value',   value: 'function(x,y){return y+x;}', start: 9, end: 35}
 * // ]
 *
 * // Sticky mode via flag y
 * str = '<1><<<2>>><3>4<5>';
 * XRegExp.matchRecursive(str, '<', '>', 'gy');
 * // -> ['1', '<<2>>', '3']
 */
    XRegExp.matchRecursive = function (str, left, right, flags, options) {
        flags = flags || "";
        options = options || {};
        var global = flags.indexOf("g") > -1,
            sticky = flags.indexOf("y") > -1,
            basicFlags = flags.replace(/y/g, ""), // Flag y controlled internally
            escapeChar = options.escapeChar,
            vN = options.valueNames,
            output = [],
            openTokens = 0,
            delimStart = 0,
            delimEnd = 0,
            lastOuterEnd = 0,
            outerStart,
            innerStart,
            leftMatch,
            rightMatch,
            esc;
        left = XRegExp(left, basicFlags);
        right = XRegExp(right, basicFlags);

        if (escapeChar) {
            if (escapeChar.length > 1) {
                throw new SyntaxError("can't use more than one escape character");
            }
            escapeChar = XRegExp.escape(escapeChar);
            // Using XRegExp.union safely rewrites backreferences in `left` and `right`
            esc = new RegExp(
                "(?:" + escapeChar + "[\\S\\s]|(?:(?!" + XRegExp.union([left, right]).source + ")[^" + escapeChar + "])+)+",
                flags.replace(/[^im]+/g, "") // Flags gy not needed here; flags nsx handled by XRegExp
            );
        }

        while (true) {
            // If using an escape character, advance to the delimiter's next starting position,
            // skipping any escaped characters in between
            if (escapeChar) {
                delimEnd += (XRegExp.exec(str, esc, delimEnd, "sticky") || [""])[0].length;
            }
            leftMatch = XRegExp.exec(str, left, delimEnd);
            rightMatch = XRegExp.exec(str, right, delimEnd);
            // Keep the leftmost match only
            if (leftMatch && rightMatch) {
                if (leftMatch.index <= rightMatch.index) {
                    rightMatch = null;
                } else {
                    leftMatch = null;
                }
            }
            /* Paths (LM:leftMatch, RM:rightMatch, OT:openTokens):
            LM | RM | OT | Result
            1  | 0  | 1  | loop
            1  | 0  | 0  | loop
            0  | 1  | 1  | loop
            0  | 1  | 0  | throw
            0  | 0  | 1  | throw
            0  | 0  | 0  | break
            * Doesn't include the sticky mode special case
            * Loop ends after the first completed match if `!global` */
            if (leftMatch || rightMatch) {
                delimStart = (leftMatch || rightMatch).index;
                delimEnd = delimStart + (leftMatch || rightMatch)[0].length;
            } else if (!openTokens) {
                break;
            }
            if (sticky && !openTokens && delimStart > lastOuterEnd) {
                break;
            }
            if (leftMatch) {
                if (!openTokens) {
                    outerStart = delimStart;
                    innerStart = delimEnd;
                }
                ++openTokens;
            } else if (rightMatch && openTokens) {
                if (!--openTokens) {
                    if (vN) {
                        if (vN[0] && outerStart > lastOuterEnd) {
                            output.push(row(vN[0], str.slice(lastOuterEnd, outerStart), lastOuterEnd, outerStart));
                        }
                        if (vN[1]) {
                            output.push(row(vN[1], str.slice(outerStart, innerStart), outerStart, innerStart));
                        }
                        if (vN[2]) {
                            output.push(row(vN[2], str.slice(innerStart, delimStart), innerStart, delimStart));
                        }
                        if (vN[3]) {
                            output.push(row(vN[3], str.slice(delimStart, delimEnd), delimStart, delimEnd));
                        }
                    } else {
                        output.push(str.slice(innerStart, delimStart));
                    }
                    lastOuterEnd = delimEnd;
                    if (!global) {
                        break;
                    }
                }
            } else {
                throw new Error("string contains unbalanced delimiters");
            }
            // If the delimiter matched an empty string, avoid an infinite loop
            if (delimStart === delimEnd) {
                ++delimEnd;
            }
        }

        if (global && !sticky && vN && vN[0] && str.length > lastOuterEnd) {
            output.push(row(vN[0], str.slice(lastOuterEnd), lastOuterEnd, str.length));
        }

        return output;
    };

}(XRegExp));


/***** build.js *****/

/*!
 * XRegExp.build v0.1.0
 * (c) 2012 Steven Levithan <http://xregexp.com/>
 * MIT License
 * Inspired by RegExp.create by Lea Verou <http://lea.verou.me/>
 */

(function (XRegExp) {
    "use strict";

    var subparts = /(\()(?!\?)|\\([1-9]\d*)|\\[\s\S]|\[(?:[^\\\]]|\\[\s\S])*]/g,
        parts = XRegExp.union([/\({{([\w$]+)}}\)|{{([\w$]+)}}/, subparts], "g");

/**
 * Strips a leading `^` and trailing unescaped `$`, if both are present.
 * @private
 * @param {String} pattern Pattern to process.
 * @returns {String} Pattern with edge anchors removed.
 */
    function deanchor(pattern) {
        var startAnchor = /^(?:\(\?:\))?\^/, // Leading `^` or `(?:)^` (handles /x cruft)
            endAnchor = /\$(?:\(\?:\))?$/; // Trailing `$` or `$(?:)` (handles /x cruft)
        if (endAnchor.test(pattern.replace(/\\[\s\S]/g, ""))) { // Ensure trailing `$` isn't escaped
            return pattern.replace(startAnchor, "").replace(endAnchor, "");
        }
        return pattern;
    }

/**
 * Converts the provided value to an XRegExp.
 * @private
 * @param {String|RegExp} value Value to convert.
 * @returns {RegExp} XRegExp object with XRegExp syntax applied.
 */
    function asXRegExp(value) {
        return XRegExp.isRegExp(value) ?
                (value.xregexp && !value.xregexp.isNative ? value : XRegExp(value.source)) :
                XRegExp(value);
    }

/**
 * Builds regexes using named subpatterns, for readability and pattern reuse. Backreferences in the
 * outer pattern and provided subpatterns are automatically renumbered to work correctly. Native
 * flags used by provided subpatterns are ignored in favor of the `flags` argument.
 * @memberOf XRegExp
 * @param {String} pattern XRegExp pattern using `{{name}}` for embedded subpatterns. Allows
 *   `({{name}})` as shorthand for `(?<name>{{name}})`. Patterns cannot be embedded within
 *   character classes.
 * @param {Object} subs Lookup object for named subpatterns. Values can be strings or regexes. A
 *   leading `^` and trailing unescaped `$` are stripped from subpatterns, if both are present.
 * @param {String} [flags] Any combination of XRegExp flags.
 * @returns {RegExp} Regex with interpolated subpatterns.
 * @example
 *
 * var time = XRegExp.build('(?x)^ {{hours}} ({{minutes}}) $', {
 *   hours: XRegExp.build('{{h12}} : | {{h24}}', {
 *     h12: /1[0-2]|0?[1-9]/,
 *     h24: /2[0-3]|[01][0-9]/
 *   }, 'x'),
 *   minutes: /^[0-5][0-9]$/
 * });
 * time.test('10:59'); // -> true
 * XRegExp.exec('10:59', time).minutes; // -> '59'
 */
    XRegExp.build = function (pattern, subs, flags) {
        var inlineFlags = /^\(\?([\w$]+)\)/.exec(pattern),
            data = {},
            numCaps = 0, // Caps is short for captures
            numPriorCaps,
            numOuterCaps = 0,
            outerCapsMap = [0],
            outerCapNames,
            sub,
            p;

        // Add flags within a leading mode modifier to the overall pattern's flags
        if (inlineFlags) {
            flags = flags || "";
            inlineFlags[1].replace(/./g, function (flag) {
                flags += (flags.indexOf(flag) > -1 ? "" : flag); // Don't add duplicates
            });
        }

        for (p in subs) {
            if (subs.hasOwnProperty(p)) {
                // Passing to XRegExp enables entended syntax for subpatterns provided as strings
                // and ensures independent validity, lest an unescaped `(`, `)`, `[`, or trailing
                // `\` breaks the `(?:)` wrapper. For subpatterns provided as regexes, it dies on
                // octals and adds the `xregexp` property, for simplicity
                sub = asXRegExp(subs[p]);
                // Deanchoring allows embedding independently useful anchored regexes. If you
                // really need to keep your anchors, double them (i.e., `^^...$$`)
                data[p] = {pattern: deanchor(sub.source), names: sub.xregexp.captureNames || []};
            }
        }

        // Passing to XRegExp dies on octals and ensures the outer pattern is independently valid;
        // helps keep this simple. Named captures will be put back
        pattern = asXRegExp(pattern);
        outerCapNames = pattern.xregexp.captureNames || [];
        pattern = pattern.source.replace(parts, function ($0, $1, $2, $3, $4) {
            var subName = $1 || $2, capName, intro;
            if (subName) { // Named subpattern
                if (!data.hasOwnProperty(subName)) {
                    throw new ReferenceError("undefined property " + $0);
                }
                if ($1) { // Named subpattern was wrapped in a capturing group
                    capName = outerCapNames[numOuterCaps];
                    outerCapsMap[++numOuterCaps] = ++numCaps;
                    // If it's a named group, preserve the name. Otherwise, use the subpattern name
                    // as the capture name
                    intro = "(?<" + (capName || subName) + ">";
                } else {
                    intro = "(?:";
                }
                numPriorCaps = numCaps;
                return intro + data[subName].pattern.replace(subparts, function (match, paren, backref) {
                    if (paren) { // Capturing group
                        capName = data[subName].names[numCaps - numPriorCaps];
                        ++numCaps;
                        if (capName) { // If the current capture has a name, preserve the name
                            return "(?<" + capName + ">";
                        }
                    } else if (backref) { // Backreference
                        return "\\" + (+backref + numPriorCaps); // Rewrite the backreference
                    }
                    return match;
                }) + ")";
            }
            if ($3) { // Capturing group
                capName = outerCapNames[numOuterCaps];
                outerCapsMap[++numOuterCaps] = ++numCaps;
                if (capName) { // If the current capture has a name, preserve the name
                    return "(?<" + capName + ">";
                }
            } else if ($4) { // Backreference
                return "\\" + outerCapsMap[+$4]; // Rewrite the backreference
            }
            return $0;
        });

        return XRegExp(pattern, flags);
    };

}(XRegExp));


/***** prototypes.js *****/

/*!
 * XRegExp Prototype Methods v1.0.0
 * (c) 2012 Steven Levithan <http://xregexp.com/>
 * MIT License
 */

/**
 * Adds a collection of methods to `XRegExp.prototype`. RegExp objects copied by XRegExp are also
 * augmented with any `XRegExp.prototype` methods. Hence, the following work equivalently:
 *
 * XRegExp('[a-z]', 'ig').xexec('abc');
 * XRegExp(/[a-z]/ig).xexec('abc');
 * XRegExp.globalize(/[a-z]/i).xexec('abc');
 */
(function (XRegExp) {
    "use strict";

/**
 * Copy properties of `b` to `a`.
 * @private
 * @param {Object} a Object that will receive new properties.
 * @param {Object} b Object whose properties will be copied.
 */
    function extend(a, b) {
        for (var p in b) {
            if (b.hasOwnProperty(p)) {
                a[p] = b[p];
            }
        }
        //return a;
    }

    extend(XRegExp.prototype, {

/**
 * Implicitly calls the regex's `test` method with the first value in the provided arguments array.
 * @memberOf XRegExp.prototype
 * @param {*} context Ignored. Accepted only for congruity with `Function.prototype.apply`.
 * @param {Array} args Array with the string to search as its first value.
 * @returns {Boolean} Whether the regex matched the provided value.
 * @example
 *
 * XRegExp('[a-z]').apply(null, ['abc']); // -> true
 */
        apply: function (context, args) {
            return this.test(args[0]);
        },

/**
 * Implicitly calls the regex's `test` method with the provided string.
 * @memberOf XRegExp.prototype
 * @param {*} context Ignored. Accepted only for congruity with `Function.prototype.call`.
 * @param {String} str String to search.
 * @returns {Boolean} Whether the regex matched the provided value.
 * @example
 *
 * XRegExp('[a-z]').call(null, 'abc'); // -> true
 */
        call: function (context, str) {
            return this.test(str);
        },

/**
 * Implicitly calls {@link #XRegExp.forEach}.
 * @memberOf XRegExp.prototype
 * @example
 *
 * XRegExp('\\d').forEach('1a2345', function (match, i) {
 *   if (i % 2) this.push(+match[0]);
 * }, []);
 * // -> [2, 4]
 */
        forEach: function (str, callback, context) {
            return XRegExp.forEach(str, this, callback, context);
        },

/**
 * Implicitly calls {@link #XRegExp.globalize}.
 * @memberOf XRegExp.prototype
 * @example
 *
 * var globalCopy = XRegExp('regex').globalize();
 * globalCopy.global; // -> true
 */
        globalize: function () {
            return XRegExp.globalize(this);
        },

/**
 * Implicitly calls {@link #XRegExp.exec}.
 * @memberOf XRegExp.prototype
 * @example
 *
 * var match = XRegExp('U\\+(?<hex>[0-9A-F]{4})').xexec('U+2620');
 * match.hex; // -> '2620'
 */
        xexec: function (str, pos, sticky) {
            return XRegExp.exec(str, this, pos, sticky);
        },

/**
 * Implicitly calls {@link #XRegExp.test}.
 * @memberOf XRegExp.prototype
 * @example
 *
 * XRegExp('c').xtest('abc'); // -> true
 */
        xtest: function (str, pos, sticky) {
            return XRegExp.test(str, this, pos, sticky);
        }

    });

}(XRegExp));


},{}],4:[function(require,module,exports){
module.exports = {
    "t": "transparent",
    "cc": "currentColor",
    "n": "none",
    "aliceblue": "aliceblue",
    "antiquewhite": "antiquewhite",
    "aqua": "aqua",
    "aquamarine": "aquamarine",
    "azure": "azure",
    "beige": "beige",
    "bisque": "bisque",
    "black": "black",
    "blanchedalmond": "blanchedalmond",
    "blue": "blue",
    "blueviolet": "blueviolet",
    "brown": "brown",
    "burlywood": "burlywood",
    "cadetblue": "cadetblue",
    "chartreuse": "chartreuse",
    "chocolate": "chocolate",
    "coral": "coral",
    "cornflowerblue": "cornflowerblue",
    "cornsilk": "cornsilk",
    "crimson": "crimson",
    "cyan": "cyan",
    "darkblue": "darkblue",
    "darkcyan": "darkcyan",
    "darkgoldenrod": "darkgoldenrod",
    "darkgray": "darkgray",
    "darkgreen": "darkgreen",
    "darkgrey": "darkgrey",
    "darkkhaki": "darkkhaki",
    "darkmagenta": "darkmagenta",
    "darkolivegreen": "darkolivegreen",
    "darkorange": "darkorange",
    "darkorchid": "darkorchid",
    "darkred": "darkred",
    "darksalmon": "darksalmon",
    "darkseagreen": "darkseagreen",
    "darkslateblue": "darkslateblue",
    "darkslategray": "darkslategray",
    "darkslategrey": "darkslategrey",
    "darkturquoise": "darkturquoise",
    "darkviolet": "darkviolet",
    "deeppink": "deeppink",
    "deepskyblue": "deepskyblue",
    "dimgray": "dimgray",
    "dimgrey": "dimgrey",
    "dodgerblue": "dodgerblue",
    "firebrick": "firebrick",
    "floralwhite": "floralwhite",
    "forestgreen": "forestgreen",
    "fuchsia": "fuchsia",
    "gainsboro": "gainsboro",
    "ghostwhite": "ghostwhite",
    "gold": "gold",
    "goldenrod": "goldenrod",
    "gray": "gray",
    "green": "green",
    "greenyellow": "greenyellow",
    "grey": "grey",
    "honeydew": "honeydew",
    "hotpink": "hotpink",
    "indianred": "indianred",
    "indigo": "indigo",
    "ivory": "ivory",
    "khaki": "khaki",
    "lavender": "lavender",
    "lavenderblush": "lavenderblush",
    "lawngreen": "lawngreen",
    "lemonchiffon": "lemonchiffon",
    "lightblue": "lightblue",
    "lightcoral": "lightcoral",
    "lightcyan": "lightcyan",
    "lightgoldenrodyellow": "lightgoldenrodyellow",
    "lightgray": "lightgray",
    "lightgreen": "lightgreen",
    "lightgrey": "lightgrey",
    "lightpink": "lightpink",
    "lightsalmon": "lightsalmon",
    "lightseagreen": "lightseagreen",
    "lightskyblue": "lightskyblue",
    "lightslategray": "lightslategray",
    "lightslategrey": "lightslategrey",
    "lightsteelblue": "lightsteelblue",
    "lightyellow": "lightyellow",
    "lime": "lime",
    "limegreen": "limegreen",
    "linen": "linen",
    "magenta": "magenta",
    "maroon": "maroon",
    "mediumaquamarine": "mediumaquamarine",
    "mediumblue": "mediumblue",
    "mediumorchid": "mediumorchid",
    "mediumpurple": "mediumpurple",
    "mediumseagreen": "mediumseagreen",
    "mediumslateblue": "mediumslateblue",
    "mediumspringgreen": "mediumspringgreen",
    "mediumturquoise": "mediumturquoise",
    "mediumvioletred": "mediumvioletred",
    "midnightblue": "midnightblue",
    "mintcream": "mintcream",
    "mistyrose": "mistyrose",
    "moccasin": "moccasin",
    "navajowhite": "navajowhite",
    "navy": "navy",
    "oldlace": "oldlace",
    "olive": "olive",
    "olivedrab": "olivedrab",
    "orange": "orange",
    "orangered": "orangered",
    "orchid": "orchid",
    "palegoldenrod": "palegoldenrod",
    "palegreen": "palegreen",
    "paleturquoise": "paleturquoise",
    "palevioletred": "palevioletred",
    "papayawhip": "papayawhip",
    "peachpuff": "peachpuff",
    "peru": "peru",
    "pink": "pink",
    "plum": "plum",
    "powderblue": "powderblue",
    "purple": "purple",
    "red": "red",
    "rosybrown": "rosybrown",
    "royalblue": "royalblue",
    "saddlebrown": "saddlebrown",
    "salmon": "salmon",
    "sandybrown": "sandybrown",
    "seagreen": "seagreen",
    "seashell": "seashell",
    "sienna": "sienna",
    "silver": "silver",
    "skyblue": "skyblue",
    "slateblue": "slateblue",
    "slategray": "slategray",
    "slategrey": "slategrey",
    "snow": "snow",
    "springgreen": "springgreen",
    "steelblue": "steelblue",
    "tan": "tan",
    "teal": "teal",
    "thistle": "thistle",
    "tomato": "tomato",
    "turquoise": "turquoise",
    "violet": "violet",
    "wheat": "wheat",
    "white": "white",
    "whitesmoke": "whitesmoke",
    "yellow": "yellow",
    "yellowgreen": "yellowgreen"
};

},{}],5:[function(require,module,exports){
/**
 * ----------------------------------------------------
 * Copyright (c) 2015, Yahoo Inc. All rights reserved.
 * Copyrights licensed under the New BSD License.
 * See the accompanying LICENSE file for terms.
 * ----------------------------------------------------
 *
 * These are helper classes in Atomic.
 * These classes are tailored to help with common styling patterns in CSS.
 * You can either use the helpers offered by Atomic or create your own
 * set of helper classes.
 *
 * Read more about helper classes here:
 * http://acss.io/guides/helper-classes.html
 **/

module.exports = [
    /**
    ==================================================================
    Borders
    1px solid borders
    ==================================================================
    */
    // all edges
    {
        "type": "helper",
        "name": "Border",
        "matcher": "Bd",
        "noParams": true,
        "styles": {
            "border-width": "1px",
            "border-style": "solid"
        }
    },
    // X axis
    {
        "type": "helper",
        "name": "Border X 1px solid",
        "matcher": "BdX",
        "noParams": true,
        "styles": {
            "border-top-width": 0,
            "border-right-width": "1px",
            "border-bottom-width": 0,
            "border-left-width": "1px",
            "border-style": "solid"
        }
    },
    // Y axis
    {
        "type": "helper",
        "name": "Border Y 1px solid",
        "matcher": "BdY",
        "noParams": true,
        "styles": {
            "border-top-width": "1px",
            "border-right-width": 0,
            "border-bottom-width": "1px",
            "border-left-width": 0,
            "border-style": "solid"

        }
    },
    // top
    {
        "type": "helper",
        "name": "Border Top 1px solid",
        "matcher": "BdT",
        "noParams": true,
        "styles": {
            "border-top-width": "1px",
            "border-right-width": 0,
            "border-bottom-width": 0,
            "border-left-width": 0,
            "border-style": "solid"
        }
    },
    // end
    {
        "type": "helper",
        "name": "Border End 1px solid",
        "matcher": "BdEnd",
        "noParams": true,
        "styles": {
            "border-top-width": 0,
            "border-__END__-width": "1px",
            "border-bottom-width": 0,
            "border-__START__-width": 0,
            "border-style": "solid"
        }
    },
    // bottom
    {
        "type": "helper",
        "name": "Border Bottom 1px solid",
        "matcher": "BdB",
        "noParams": true,
        "styles": {
            "border-top-width": 0,
            "border-right-width": 0,
            "border-bottom-width": "1px",
            "border-left-width": 0,
            "border-style": "solid"
        }
    },
    // start
    {
        "type": "helper",
        "name": "Border Start 1px solid",
        "matcher": "BdStart",
        "noParams": true,
        "styles": {
            "border-top-width": 0,
            "border-__END__-width": 0,
            "border-bottom-width": 0,
            "border-__START__-width": "1px",
            "border-style": "solid"
        }
    },
    /**
    ==================================================================
    BfcHack
    1. this is a hack, it does not make the box grow up to 1600px, just enough
       to fill the container.
    ==================================================================
    */
    {
        "type": "helper",
        "name": "BfcHack",
        "matcher": "BfcHack",
        "noParams": true,
        "styles": {
            "display": "table-cell",
            "width": "1600px", /* 1 */
            "*width": "auto",
            "zoom": 1
        }
    },
    /**
    ==================================================================
    Clearfix
    ==================================================================
    */
    {
        "type": "helper",
        "name": "Clearfix",
        "matcher": "Cf",
        "noParams": true,
        "styles": {
            "zoom": 1
        },
        "rules": {
            ".Cf:before, .Cf:after": {
                "content": "\" \"",
                "display": "table"
            },
            ".Cf:after": {
                "clear": "both"
            }
        }
    },
    /**
    ==================================================================
    Ellipsis
    Single line with ellipsis (see also LineClamp below)
    ==================================================================
    */
    {
        "type": "helper",
        "name": "Ellipsis",
        "matcher": "Ell",
        "noParams": true,
        "styles": {
            "max-width": "100%",
            "white-space": "nowrap",
            "overflow": "hidden",
            "text-overflow": "ellipsis",
            "hyphens": "none"
        },
        "rules": {
            ".Ell:after": {
                "content": "\".\"",
                "font-size": 0,
                "visibility": "hidden",
                "display": "inline-block",
                "overflow": "hidden",
                "height": 0,
                "width": 0
            }
        }
    },
    /**
    ==================================================================
    Hidden
    Hides content from sighted users (accessible to SR users)
    ==================================================================
    */
    {
        "type": "helper",
        "name": "Hidden",
        "matcher": "Hidden",
        "noParams": true,
        "styles": {
            "position": "absolute !important",
            "*clip": "rect(1px 1px 1px 1px)",
            "clip": "rect(1px,1px,1px,1px)",
            "padding": "0 !important",
            "border": "0 !important",
            "height": "1px !important",
            "width": "1px !important",
            "overflow": "hidden"
        }
    },
    /**
    ==================================================================
    IbBox
    'shortcut' for inline-block construct
    ==================================================================
    */
    {
        "type": "helper",
        "name": "IbBox",
        "matcher": "IbBox",
        "noParams": true,
        "styles": {
            "display": "inline-block",
            "*display": "inline",
            "zoom": 1,
            "vertical-align": "top"
        }
    },
    /**
    ==================================================================
    LineClamp
    Truncates multiple line of text across browsers.
    Arguments:
       1. the number of lines you want to display
       2. the max-height to use for the box
    ==================================================================
    */
    {
        "type": "helper",
        "name": "Line clamp",
        "matcher": "LineClamp",
        "styles": {
            "-webkit-line-clamp": "$0",
            "max-height": "$1"
        },
        "rules": {
            "[class*=LineClamp]": {
                "display": "-webkit-box",
                "-webkit-box-orient": "vertical",
                "overflow": "hidden"
            },
            "a[class*=LineClamp]": {
                "display": "inline-block",
                "display ": "-webkit-box",
                "*display": "inline",
                "zoom": 1
            },
            /**
            * Fix WebKit bug that displays ellipsis in middle of text inside *LINKS*
            * see: https://twitter.com/thierrykoblentz/status/443899465842176000
            * 1. removes that hack out of the flow (bug reported by Fonda)
            */
            "a[class*=LineClamp]:after": {
                "content": "\".\"",
                "font-size": 0,
                "visibility": "hidden",
                "display": "inline-block", /* 1 */
                "overflow": "hidden", /* 1 */
                "height": 0, /* 1 */
                "width": 0 /* 1 */
            }
        }
    },
    /**
    ==================================================================
    Row
    Meant to contain boxes on a row (from left to right of containing box)
    See: http://cssmojo.com/row_for_grids/
    ==================================================================
    */
    {
        "type": "helper",
        "name": "Row",
        "matcher": "Row",
        "noParams": true,
        "styles": {
            "clear": "both",
            "display": "inline-block",
            "vertical-align": "top",
            "width": "100%",
            "box-sizing": "border-box",
            "*display": "block",
            "*width": "auto",
            "zoom": 1
        }
    },
    /**
    ==================================================================
    StretchedBox
    Stretches a box inside its 'containing block'
    ==================================================================
    */
    {
        "type": "helper",
        "name": "StretchedBox",
        "matcher": "StretchedBox",
        "noParams": true,
        "styles": {
            "position": "absolute",
            "top": 0,
            "right": 0,
            "bottom": 0,
            "left": 0
        }
    },
    /**
    ==================================================================
    Zoom
    hack for oldIE to create a "block-formatting context"
    ==================================================================
    */
    {
        "type": "helper",
        "name": "Zoom",
        "matcher": "Zoom",
        "noParams": true,
        "styles": {
            "zoom": "1"
        }
    },
];

},{}],6:[function(require,module,exports){
'use strict';

var _ = require('lodash');
var XRegExp = require('xregexp').XRegExp;

var PSEUDOS = {
    ':active':          ':a',
    ':checked':         ':c',
    ':default':         ':d',
    ':disabled':        ':di',
    ':empty':           ':e',
    ':enabled':         ':en',
    ':first':           ':fi',
    ':first-child':     ':fc',
    ':first-of-type':   ':fot',
    ':fullscreen':      ':fs',
    ':focus':           ':f',
    ':hover':           ':h',
    ':indeterminate':   ':ind',
    ':in-range':        ':ir',
    ':invalid':         ':inv',
    ':last-child':      ':lc',
    ':last-of-type':    ':lot',
    ':left':            ':l',
    ':link':            ':li',
    ':only-child':      ':oc',
    ':only-of-type':    ':oot',
    ':optional':        ':o',
    ':out-of-range':    ':oor',
    ':read-only':       ':ro',
    ':read-write':      ':rw',
    ':required':        ':req',
    ':right':           ':r',
    ':root':            ':rt',
    ':scope':           ':s',
    ':target':          ':t',
    ':valid':           ':va',
    ':visited':         ':vi'
};

var PSEUDOS_INVERTED = _.invert(PSEUDOS);
var PSEUDO_REGEX = [];
for (var pseudo in PSEUDOS) {
    PSEUDO_REGEX.push(pseudo);
    PSEUDO_REGEX.push(PSEUDOS[pseudo]);
}
PSEUDO_REGEX = '(?:' + PSEUDO_REGEX.join('|') + ')(?![a-z])';

// regular grammar to match valid atomic classes
var GRAMMAR = {
    'BOUNDARY'      : '(?:^|\\s|"|\'|\{|\})',
    'PARENT'        : '[a-zA-Z][-_a-zA-Z0-9]+?',
    'PARENT_SEP'    : '[>_+]',
    // all characters allowed to be a prop
    'PROP'          : '[A-Za-z]+',
    // all character allowed to be in values
    'VALUES'        : '[-_,.#$/%0-9a-zA-Z]+',
    'FRACTION'      : '(?<numerator>[0-9]+)\\/(?<denominator>[1-9](?:[0-9]+)?)',
    'PARAMS'        : '\\((?<params>[^)]*)\\)',
    'NUMBER'        : '-?[0-9]+(?:\.[0-9]+)?|\\.[0-9]+',
    'UNIT'          : '[a-zA-Z%]+',
    'HEX'           : '#[0-9a-f]{3}(?:[0-9a-f]{3})?',
    'ALPHA'         : '\\.\\d{1,2}',
    'IMPORTANT'     : '!',
    // https://regex101.com/r/mM2vT9/8
    'NAMED'         : '([\\w$]+(?:(?:-(?!\\-))?\\w*)*)',
    'PSEUDO'        : PSEUDO_REGEX,
    'PSEUDO_SIMPLE' : ':[a-z]+',
    'BREAKPOINT'    : '--(?<breakPoint>[a-z0-9]+)'
};

GRAMMAR.PARENT_SELECTOR = [
    // parent (any character that is not a space)
    '(?<parent>',
        GRAMMAR.PARENT,
    ')',
    // followed by optional pseudo class
    '(?<parentPseudo>',
        GRAMMAR.PSEUDO,
    ')?',
    // followed by either a descendant or direct symbol
    '(?<parentSep>',
        GRAMMAR.PARENT_SEP,
    ')'
].join('');

GRAMMAR.PARENT_SELECTOR_SIMPLE = [
    // parent (any character that is not a space)
    '(?<parent>',
        GRAMMAR.PARENT,
    ')',
    // followed by optional pseudo class
    '(?<parentPseudo>',
        GRAMMAR.PSEUDO_SIMPLE,
    ')?',
    // followed by either a descendant or direct symbol
    '(?<parentSep>',
        GRAMMAR.PARENT_SEP,
    ')'
].join('');

var VALUE_SYNTAXE = XRegExp([
    '(?<fraction>',
        GRAMMAR.FRACTION,
    ')',
    '|',
    '(?:',
        '(?<hex>',
            GRAMMAR.HEX,
        ')',
        '(?<alpha>',
            GRAMMAR.ALPHA,
        ')?',
        '(?!',
            GRAMMAR.UNIT,
        ')',
    ')',
    '|',
    '(?<number>',
        GRAMMAR.NUMBER,
    ')',
    '(?<unit>',
        GRAMMAR.UNIT,
    ')?',
    '|',
    '(?<named>',
        GRAMMAR.NAMED,
    ')',
].join(''));

/**
 * sort matchers by descending alphabetical order
 * this is important so "B" doesn't match "Bgc"
 * e.g. Use (Bgc|B) instead of (B|Bgc)
 */
function getSortedKeys(arr) {
    return arr.length > 1 ? arr.sort(function (a, b) {
        return a > b ? -1 : 1;
    }).join('|') : arr.toString();
}

function buildRegex(matchersParams, matchersNoParams) {
    matchersParams = matchersParams ? '(?<atomicSelector>' + matchersParams + ')\\((?<atomicValues>' + GRAMMAR.VALUES + ')\\)' : '';
    matchersNoParams = matchersNoParams ? '(?<selector>' + matchersNoParams + ')' : '';
    return '(?:' + [matchersParams, matchersNoParams].join('|') + ')';
}

function Grammar(rules) {
    var matchersParams = [];
    var matchersNoParams = [];
    var matchersParamsStr;
    var matchersNoParamsStr;

    rules.forEach(function (rule) {
        if (rule.noParams) {
            matchersNoParams.push(rule.matcher);
        } else {
            matchersParams.push(rule.matcher);
        }
    });

    matchersParamsStr = getSortedKeys(matchersParams);
    matchersNoParamsStr = getSortedKeys(matchersNoParams);

    this.simpleSyntax = buildRegex(GRAMMAR.PROP, matchersNoParamsStr);
    this.complexSyntax = buildRegex(matchersParamsStr, matchersNoParamsStr);
}

/**
 * get non abbreviated pseudo class string given abbreviated or non abbreviated form
 */
Grammar.getPseudo = function getPseudo(pseudoName)/*:string*/ {
    return PSEUDOS[pseudoName] ? pseudoName : PSEUDOS_INVERTED[pseudoName];
};

Grammar.matchValue = function matchValue(value) {
    return XRegExp.exec(value, VALUE_SYNTAXE);
};

Grammar.prototype.getSyntax = function getSyntax(isSimple)/*:string*/ {
    var syntax = [
        // word boundary
        GRAMMAR.BOUNDARY,
        '(',
        // optional parent
        '(?<parentSelector>',
            isSimple ? GRAMMAR.PARENT_SELECTOR_SIMPLE : GRAMMAR.PARENT_SELECTOR,
        ')?',
        // the main syntax
        isSimple ? this.simpleSyntax : this.complexSyntax,
        '(?<important>',
            GRAMMAR.IMPORTANT,
        ')?',
        // optional pseudo
        '(?<valuePseudo>',
            isSimple ? GRAMMAR.PSEUDO_SIMPLE : GRAMMAR.PSEUDO,
        ')?',
        // optional modifier
        '(?:',
            GRAMMAR.BREAKPOINT,
        ')?',
        ')'
    ].join('');

    return XRegExp(syntax, 'g');
};

module.exports = Grammar;

},{"lodash":1,"xregexp":3}],7:[function(require,module,exports){
/**
 * Utility functions to handle JSS objects (JS literal objects with similar CSS structure)
 */
var utils = require('./utils');
var JSS = {};

// returns a new JSS with flattened selectors
JSS.flattenSelectors = function (newJss/*:Jss*/, jss/*:Jss*/, parent/*:string*/) {
    var props;
    var value;
    var selector;

    parent = parent || '';
    selector = parent;

    for (var rule in jss) {
        props = jss[rule];
        for (var prop in props) {
            value = props[prop];
            // prop is not a prop
            if (typeof value === 'object') {
                // prop is a media query
                if (/^@media/.test(prop)) {
                    if (!newJss[prop]) {
                        newJss[prop] = {};
                    }
                    newJss[prop][parent ? parent + ' ' + rule : rule] = value;
                } else {
                    JSS.flattenSelectors(newJss, props, parent ? parent + ' ' + rule : rule);
                }
            }
            // prop is prop
            else /*if (typeof value === 'string' || typeof value === 'number')*/ {
                selector = parent ? parent + ' ' + rule : rule;
                if (!newJss[selector]) {
                    newJss[selector] = {};
                }
                newJss[selector][prop] = value;
            }
        }
    }
    return newJss;
};

// read a flat JSS and build an Extracted object
JSS.extractProperties = function (extracted/*:Extracted*/, jss/*:JssFlat*/, block/*:string*/)/*:Extracted*/ {
    var props;
    var prop;
    var extract;

    block = block || 'main';

    for (var selector in jss) {
        props = jss[selector];
        // if selector is a media query
        if (/^@media/.test(selector)) {
            JSS.extractProperties(extracted, props, selector);
        } else {
            for (prop in props) {
                if (!extracted[block]) {
                    extracted[block] = [];
                }
                extracted[block].push({
                    selector: selector,
                    prop: prop,
                    value: props[prop]
                });
            }
        }
    }

    return extracted;
};

// combine selectors in an extracted object
JSS.combineSelectors = function (extracted/*:Extracted*/)/*:Extracted*/ {
    var extracts;
    for (var block in extracted) {
        extracts = extracted[block];
        for (var i = 0, l = extracts.length; i < l; i += 1) {
            // If this selector has an escaped colon, we can't safely combine it
            // with another selector since it will break in IE < 8
            if (extracts[i].selector && extracts[i].selector.indexOf('\:') > -1) { continue; }
            for(var j = i + 1; j < l; j += 1) {
                // If this selector has an escaped colon, we can't safely combine it
                // with another selector since it will break in IE < 8
                if (extracts[j].selector && extracts[j].selector.indexOf('\:') > -1) { continue; }
                // combine if prop and value match
                if(extracts[i].prop === extracts[j].prop && extracts[i].value === extracts[j].value) {
                    if (extracts[j].selector) {
                        extracts[i].selector += ', ' + extracts[j].selector;
                    } else {
                        extracts[i].selector = false;
                    }
                    extracts[j].selector = false; // marking for removal
                }
            }
        }
    }
    return extracted;
};

JSS.extractedToStylesheet = function (extracted/*:Extracted*/)/*:Stylesheet*/ {
    var stylesheet = {};

    for (var block in extracted) {
        extracted[block].forEach(function (extracts) {
            if (extracts.selector) {
                if (!stylesheet[block]) {
                    stylesheet[block] = {};
                }
                if (!stylesheet[block][extracts.selector]) {
                    stylesheet[block][extracts.selector] = {};
                }
                stylesheet[block][extracts.selector][extracts.prop] = extracts.value;
            }
        });
    }

    return stylesheet;
};

// transforms jss to css
JSS.jssToCss = function (jss/*:Jss*/, options/*:Options*/) {
    var css = [];
    var extracted/*:Extracted*/;
    var stylesheet/*:Stylesheet*/;
    var tab = options && options.tabWidth && utils.repeatString(' ', parseInt(options.tabWidth, 10)) || utils.repeatString(' ', 2);
    var ruleTab = '';

    // flatten nested selectors
    jss = JSS.flattenSelectors({}, jss);

    // extract properties
    extracted = JSS.extractProperties({}, jss);

    // combine the selectors in the stylesheet
    extracted = JSS.combineSelectors(extracted);

    // build stylesheet object from extract
    stylesheet = JSS.extractedToStylesheet(extracted);

    // finally, write css
    for (var block in stylesheet) {
        if (block !== 'main') {
            ruleTab = tab;
            css.push(block + ' {');
        }
        for (var selector in stylesheet[block]) {
            css.push(ruleTab + selector + ' {');
            for (var prop in stylesheet[block][selector]) {
                css.push(ruleTab + tab + prop + ': ' + stylesheet[block][selector][prop] + ';');
            }
            css.push(ruleTab + '}');
        }
        if (block !== 'main') {
            css.push('}');
        }
    }

    css = css.length > 0 ? css.join('\n') + '\n' : '';

    return css;
};

module.exports = JSS;
},{"./utils":8}],8:[function(require,module,exports){
var _ = require('lodash');

var utils = {};

// hex value to rgb object
utils.hexToRgb = function (hex/*:string*/)/*:Rgb*/ {
    var result;

    // shorthand to full form
    hex = hex.replace(/^#?([a-f\d])([a-f\d])([a-f\d])$/i, function(m, r, g, b) {
        return r + r + g + g + b + b;
    });

    result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
    return result ? {
        r: parseInt(result[1], 16),
        g: parseInt(result[2], 16),
        b: parseInt(result[3], 16)
    } : null;
};

/**
 * helper function to handle merging array of strings
 * @param  {mixed} a Data of the first merge param
 * @param  {mixed} b Data of the second merge param
 * @return {mixed}   The merged array
 */
utils.handleMergeArrays = function (a, b) {
    if (_.isArray(a) && _.isArray(b)) {
        return _.union(a, b);
    }
};

// merge atomizer configs into a single config
utils.mergeConfigs = function (configs/*:Config[]*/)/*:Config*/ {
    // TODO: Offer option to warn on conflicts
    return _.merge.apply(null, configs.concat(utils.handleMergeArrays));
};

// returns a repeated string by X amount
utils.repeatString = function (pattern/*:string*/, count/*:integer*/) {
    var result = '';
    if (count < 1) {
        return result;
    }
    while (count > 1) {
        if (count & 1) {
            result += pattern;
        }
        count >>= 1, pattern += pattern;
    }
    return result + pattern;
};

module.exports = utils;
},{"lodash":1}],9:[function(require,module,exports){
/**
 * ----------------------------------------------------
 * Copyright (c) 2015, Yahoo Inc. All rights reserved.
 * Copyrights licensed under the New BSD License.
 * See the accompanying LICENSE file for terms.
 * ----------------------------------------------------
 *
 * These are the main Atomic CSS rules.
 * By default, all rules accept "inh" ("inherit").
 *
 * Please submit a PR if you find any missing rule.
 *
 * Most abbreviations are based on Emmet:
 * http://docs.emmet.io/cheat-sheet/
 *
 * Read more about abbreviations here:
 * http://acss.io/guides/syntax.html
 *
 * NOTES:
 *
 * Depending on the selector you use to namespace these rules (id versus class),
 * their style weight will be either 0,1,1,0 or 0,0,2,0. We suggest using an id
 * for the extra specificity.
 *
 * - look for top/right/bottom/left rules in the "offset" section.
 * - we do *not* use left and right as keywords for class names, instead we use
 *   "start" and "end".
 * - Rules is written as an array because ORDER is important for the CSS generation.
 **/

var colors = require('./colors');

module.exports = [
    /**
    ==================================================================
    ANIMATION
    ==================================================================
    */
    {
        "type": "pattern",
        "id": "animation",
        "name": "Animation",
        "matcher": "Anim",
        "allowParamToValue": true,
        "styles": {
            "animation": "$0"
        }
    },
    {
        "type": "pattern",
        "id": "animation-delay",
        "name": "Animation delay",
        "matcher": "Animdel",
        "allowParamToValue": true,
        "styles": {
            "animation-delay": "$0"
        }
    },
    {
        "type": "pattern",
        "id": "animation-direction",
        "name": "Animation direction",
        "matcher": "Animdir",
        "allowParamToValue": false,
        "styles": {
            "animation-direction": "$0"
        },
        "arguments": [
            {
                "a": "alternate",
                "ar": "alternate-reverse",
                "n": "normal",
                "r": "reverse"
            }
        ]
    },
    {
        "type": "pattern",
        "id": "animation-duration",
        "name": "Animation duration",
        "matcher": "Animdur",
        "allowParamToValue": true,
        "styles": {
            "animation-duration": "$0"
        }
    },
    {
        "type": "pattern",
        "id": "animation-fill-mode",
        "name": "Animation fill mode",
        "matcher": "Animfm",
        "allowParamToValue": false,
        "styles": {
            "animation-fill-mode": "$0"
        },
        "arguments": [
            {
                "b": "backwards",
                "bo": "both",
                "f": "forwards",
                "n": "none"
            }
        ]
    },
    {
        "type": "pattern",
        "id": "animation-iteration-count",
        "name": "Animation iteration count",
        "matcher": "Animic",
        "allowParamToValue": true,
        "styles": {
            "animation-iteration-count": "$0"
        },
        "arguments": [
            {
                "i": "infinite"
            }
        ]
    },
    {
        "type": "pattern",
        "id": "animation-name",
        "name": "Animation name",
        "matcher": "Animn",
        "allowParamToValue": true,
        "styles": {
            "animation-name": "$0"
        },
        "arguments": [
            {
                "n": "none"
            }
        ]
    },
    {
        "type": "pattern",
        "id": "animation-play-state",
        "name": "Animation play state",
        "matcher": "Animps",
        "allowParamToValue": false,
        "styles": {
            "animation-play-state": "$0"
        },
        "arguments": [
            {
                "p": "paused",
                "r": "running"
            }
        ]
    },
    {
        "type": "pattern",
        "id": "animation-timing-function",
        "name": "Animation timing function",
        "matcher": "Animtf",
        "allowParamToValue": false,
        "styles": {
            "animation-timing-function": "$0"
        },
        "arguments": [
            {
                "e": "ease",
                "ei": "ease-in",
                "eo": "ease-out",
                "eio": "ease-in-out",
                "l": "linear",
                "se": "step-end",
                "ss": "step-start"
            }
        ]
    },
    /**
    ==================================================================
    BORDERS
    ==================================================================
    */
    // all edges
    {
        "type": "pattern",
        "name": "Border",
        "matcher": "Bd",
        "allowParamToValue": false,
        "styles": {
            "border": "$0"
        },
        "arguments": [
            {
                "0": 0,
                "n": "none"
            }
        ]
    },
    // X axis
    {
        "type": "pattern",
        "name": "Border X",
        "matcher": "Bdx",
        "allowParamToValue": false,
        "styles": {
            "border-__START__": "$0",
            "border-__END__": "$0"
        }
    },
    // Y axis
    {
        "type": "pattern",
        "name": "Border Y",
        "matcher": "Bdy",
        "allowParamToValue": false,
        "styles": {
            "border-top": "$0",
            "border-bottom": "$0"
        }
    },
    // top
    {
        "type": "pattern",
        "name": "Border top",
        "matcher": "Bdt",
        "allowParamToValue": false,
        "styles": {
            "border-top": "$0"
        }
    },
    // end
    {
        "type": "pattern",
        "name": "Border end",
        "matcher": "Bdend",
        "allowParamToValue": false,
        "styles": {
            "border-__END__": "$0"
        }
    },
    // bottom
    {
        "type": "pattern",
        "name": "Border bottom",
        "matcher": "Bdb",
        "allowParamToValue": false,
        "styles": {
            "border-bottom": "$0"
        }
    },
    // start
    {
        "type": "pattern",
        "name": "Border start",
        "matcher": "Bdstart",
        "allowParamToValue": false,
        "styles": {
            "border-__START__": "$0"
        }
    },
    /**
    ==================================================================
    BORDER COLOR
    ==================================================================
    */
    // all edges
    {
        "type": "pattern",
        "name": "Border color",
        "matcher": "Bdc",
        "allowParamToValue": true,
        "styles": {
            "border-color": "$0"
        },
        "arguments": [colors]
    },
    // top
    {
        "type": "pattern",
        "name": "Border top color",
        "matcher": "Bdtc",
        "allowParamToValue": true,
        "styles": {
            "border-top-color": "$0"
        },
        "arguments": [colors]
    },
    // end
    {
        "type": "pattern",
        "name": "Border end color",
        "matcher": "Bdendc",
        "allowParamToValue": true,
        "styles": {
            "border-__END__-color": "$0"
        },
        "arguments": [colors]
    },
    // bottom
    {
        "type": "pattern",
        "name": "Border bottom color",
        "matcher": "Bdbc",
        "allowParamToValue": true,
        "styles": {
            "border-bottom-color": "$0"
        },
        "arguments": [colors]
    },
    // start
    {
        "type": "pattern",
        "name": "Border start color",
        "matcher": "Bdstartc",
        "allowParamToValue": true,
        "styles": {
            "border-__START__-color": "$0"
        },
        "arguments": [colors]
    },
    /**
    ==================================================================
    BORDER SPACING
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Border spacing",
        "matcher": "Bdsp",
        "allowParamToValue": true,
        "styles": {
            "border-spacing": "$0 $1"
        },
        "arguments": [{
            "i": "inherit"
        }]
    },
    /**
    ==================================================================
    BORDER STYLE
    ==================================================================
    */
    // all edges
    {
        "type": "pattern",
        "name": "Border style",
        "matcher": "Bds",
        "allowParamToValue": false,
        "styles": {
            "border-style": "$0"
        },
        "arguments": [{
            "d": "dotted",
            "da": "dashed",
            "do": "double",
            "g": "groove",
            "h": "hidden",
            "i": "inset",
            "n": "none",
            "o": "outset",
            "r": "ridge",
            "s": "solid"
        }]
    },
    // top
    {
        "type": "pattern",
        "name": "Border top style",
        "matcher": "Bdts",
        "allowParamToValue": false,
        "styles": {
            "border-top-style": "$0"
        },
        "arguments": [{
            "d": "dotted",
            "da": "dashed",
            "do": "double",
            "g": "groove",
            "h": "hidden",
            "i": "inset",
            "n": "none",
            "o": "outset",
            "r": "ridge",
            "s": "solid"
        }]
    },
    // end
    {
        "type": "pattern",
        "name": "Border end style",
        "matcher": "Bdends",
        "allowParamToValue": false,
        "styles": {
            "border-__END__-style": "$0"
        },
        "arguments": [{
            "d": "dotted",
            "da": "dashed",
            "do": "double",
            "g": "groove",
            "h": "hidden",
            "i": "inset",
            "n": "none",
            "o": "outset",
            "r": "ridge",
            "s": "solid"
        }]
    },
    // bottom
    {
        "type": "pattern",
        "name": "Border bottom style",
        "matcher": "Bdbs",
        "allowParamToValue": false,
        "styles": {
            "border-bottom-style": "$0"
        },
        "arguments": [{
            "d": "dotted",
            "da": "dashed",
            "do": "double",
            "g": "groove",
            "h": "hidden",
            "i": "inset",
            "n": "none",
            "o": "outset",
            "r": "ridge",
            "s": "solid"
        }]
    },
    // start
    {
        "type": "pattern",
        "name": "Border start style",
        "matcher": "Bdstarts",
        "allowParamToValue": false,
        "styles": {
            "border-__START__-style": "$0"
        },
        "arguments": [{
            "d": "dotted",
            "da": "dashed",
            "do": "double",
            "g": "groove",
            "h": "hidden",
            "i": "inset",
            "n": "none",
            "o": "outset",
            "r": "ridge",
            "s": "solid"
        }]
    },
    /**
    ==================================================================
    BORDER WIDTH
    ==================================================================
    */
    // all edges
    {
        "type": "pattern",
        "name": "Border width",
        "matcher": "Bdw",
        "allowParamToValue": true,
        "styles": {
            "border-width": "$0"
        },
        "arguments": [{
            "m": "medium",
            "t": "thin",
            "th": "thick"
        }]
    },
    // top
    {
        "type": "pattern",
        "name": "Border top width",
        "matcher": "Bdtw",
        "allowParamToValue": true,
        "styles": {
            "border-top-width": "$0"
        },
        "arguments": [{
            "m": "medium",
            "t": "thin",
            "th": "thick"
        }]
    },
    // end
    {
        "type": "pattern",
        "name": "Border end width",
        "matcher": "Bdendw",
        "allowParamToValue": true,
        "styles": {
            "border-__END__-width": "$0"
        },
        "arguments": [{
            "m": "medium",
            "t": "thin",
            "th": "thick"
        }]
    },
    // bottom
    {
        "type": "pattern",
        "name": "Border bottom width",
        "matcher": "Bdbw",
        "allowParamToValue": true,
        "styles": {
            "border-bottom-width": "$0"
        },
        "arguments": [{
            "m": "medium",
            "t": "thin",
            "th": "thick"
        }]
    },
    // start
    {
        "type": "pattern",
        "name": "Border start width",
        "matcher": "Bdstartw",
        "allowParamToValue": true,
        "styles": {
            "border-__START__-width": "$0"
        },
        "arguments": [{
            "m": "medium",
            "t": "thin",
            "th": "thick"
        }]
    },
    /**
    ==================================================================
    BORDER RADIUS
    ==================================================================
    */
    // all corners
    {
        "type": "pattern",
        "name": "Border radius",
        "matcher": "Bdrs",
        "allowParamToValue": true,
        "styles": {
            "border-radius": "$0"
        }
    },
    // top-right
    {
        "type": "pattern",
        "name": "Border radius top right",
        "matcher": "Bdrstend",
        "allowParamToValue": true,
        "styles": {
            "border-top-__END__-radius": "$0"
        }
    },
    // bottom-right
    {
        "type": "pattern",
        "name": "Border radius bottom right",
        "matcher": "Bdrsbend",
        "allowParamToValue": true,
        "styles": {
            "border-bottom-__END__-radius": "$0"
        }
    },
    // bottom-left
    {
        "type": "pattern",
        "name": "Border radius bottom left",
        "matcher": "Bdrsbstart",
        "allowParamToValue": true,
        "styles": {
            "border-bottom-__START__-radius": "$0"
        }
    },
    // top-left
    {
        "type": "pattern",
        "name": "Border radius top left",
        "matcher": "Bdrststart",
        "allowParamToValue": true,
        "styles": {
            "border-top-__START__-radius": "$0"
        }
    },
    /**
    ==================================================================
    BACKGROUNDS
    ==================================================================
    */
    // background
    {
        "type": "pattern",
        "name": "Background",
        "matcher": "Bg",
        "allowParamToValue": false,
        "styles": {
            "background": "$0"
        },
        "arguments": [{
            "n": "none",
            "t": "transparent"
        }]
    },
    // background-image
    {
        "type": "pattern",
        "name": "Background image",
        "matcher": "Bgi",
        "allowParamToValue": false,
        "styles": {
            "background-image": "$0"
        },
        "arguments": [{
            "n": "none"
        }]
    },
    // background-color
    {
        "type": "pattern",
        "name": "Background color",
        "matcher": "Bgc",
        "allowParamToValue": true,
        "styles": {
            "background-color": "$0"
        },
        "arguments": [colors]
    },
    // background-clip
    {
        "type": "pattern",
        "name": "Background clip",
        "matcher": "Bgcp",
        "allowParamToValue": false,
        "styles": {
            "background-clip": "$0"
        },
        "arguments": [{
            "bb": "border-box",
            "cb": "content-box",
            "pb": "padding-box"
        }]
    },
    // background-origin
    {
        "type": "pattern",
        "name": "Background origin",
        "matcher": "Bgo",
        "allowParamToValue": false,
        "styles": {
            "background-origin": "$0"
        },
        "arguments": [{
            "bb": "border-box",
            "cb": "content-box",
            "pb": "padding-box"
        }]
    },
    // background-size
    {
        "type": "pattern",
        "name": "Background size",
        "matcher": "Bgz",
        "allowParamToValue": true,
        "styles": {
            "background-size": "$0"
        },
        "arguments": [{
            "a": "auto",
            "ct": "contain",
            "cv": "cover"
        }]
    },
    // background-attachment
    {
        "type": "pattern",
        "name": "Background attachment",
        "matcher": "Bga",
        "allowParamToValue": false,
        "styles": {
            "background-attachment": "$0"
        },
        "arguments": [{
            "f": "fixed",
            "l": "local",
            "s": "scroll"
        }]
    },
    // background-position
    {
        "type": "pattern",
        "name": "Background position",
        "matcher": "Bgp",
        "allowParamToValue": true,
        "styles": {
            "background-position": "$0 $1"
        },
        "arguments": [{
            "start_t": "__START__ 0",
            "end_t": "__END__ 0",
            "start_b": "__START__ 100%",
            "end_b": "__END__ 100%",
            "start_c": "__START__ center",
            "c_t": "center 0",
            "c": "center"
        }]
    },
    // background-position-x
    {
        "type": "pattern",
        "name": "Background position (X axis)",
        "matcher": "Bgpx",
        "allowParamToValue": true,
        "styles": {
            "background-position-x": "$0"
        },
        "arguments": [{
            "start": "__START__",
            "end": "__END__",
            "c": "50%"
        }]
    },
    // background-position-y
    {
        "type": "pattern",
        "name": "Background position (Y axis)",
        "matcher": "Bgpy",
        "allowParamToValue": true,
        "styles": {
            "background-position-y": "$0"
        },
        "arguments": [{
            "t": "0",
            "b": "100%",
            "c": "50%"
        }]
    },
    // background-repeat
    {
        "type": "pattern",
        "name": "Background repeat",
        "matcher": "Bgr",
        "allowParamToValue": false,
        "styles": {
            "background-repeat": "$0"
        },
        "arguments": [{
            "nr": "no-repeat",
            "rx": "repeat-x",
            "ry": "repeat-y",
            "r": "repeat",
            "s": "space",
            "ro": "round"
        }]
    },
    /**
    ==================================================================
    BORDER-COLLAPSE
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Border collapse",
        "matcher": "Bdcl",
        "allowParamToValue": false,
        "styles": {
            "border-collapse": "$0"
        },
        "arguments": [{
            "c": "collapse",
            "s": "separate"
        }]
    },
    /**
    ==================================================================
    BOX-SIZING
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Box sizing",
        "matcher": "Bxz",
        "allowParamToValue": false,
        "styles": {
            "box-sizing": "$0"
        },
        "arguments": [{
            "cb": "content-box",
            "pb": "padding-box",
            "bb": "border-box"
        }]
    },
    /**
    ==================================================================
    BOX-SHADOW
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Box shadow",
        "matcher": "Bxsh",
        "allowParamToValue": false,
        "styles": {
            "box-shadow": "$0"
        },
        "arguments": [{
            "n": "none"
        }]
    },
    /**
    ==================================================================
    CLEAR
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Clear",
        "matcher": "Cl",
        "allowParamToValue": false,
        "styles": {
            "clear": "$0"
        },
        "arguments": [{
            "n": "none",
            "b": "both",
            "start": "__START__",
            "end": "__END__"
        }]
    },
    /**
    ==================================================================
    COLOR
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Color",
        "matcher": "C",
        "allowParamToValue": true,
        "styles": {
            "color": "$0"
        },
        "arguments": [colors]
    },
    /**
    ==================================================================
    CURSOR
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Cursor",
        "matcher": "Cur",
        "allowParamToValue": false,
        "styles": {
            "cursor": "$0"
        },
        "arguments": [{
            "a": "auto",
            "as": "all-scroll",
            "c": "cell",
            "cr": "col-resize",
            "co": "copy",
            "cro": "crosshair",
            "d": "default",
            "er": "e-resize",
            "ewr": "ew-resize",
            "g": "grab",
            "gr": "grabbing",
            "h": "help",
            "m": "move",
            "n": "none",
            "nd": "no-drop",
            "na": "not-allowed",
            "nr": "n-resize",
            "ner": "ne-resize",
            "neswr": "nesw-resize",
            "nwser": "nwse-resize",
            "nsr": "ns-resize",
            "nwr": "nw-resize",
            "p": "pointer",
            "pr": "progress",
            "rr": "row-resize",
            "sr": "s-resize",
            "ser": "se-resize",
            "swr": "sw-resize",
            "t": "text",
            "vt": "vertical-text",
            "w": "wait",
            "wr": "w-resize",
            "zi": "zoom-in",
            "zo": "zoom-out"
        }]
    },
    /**
    ==================================================================
    DISPLAY
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Display",
        "matcher": "D",
        "allowParamToValue": false,
        "styles": {
            "display": "$0"
        },
        "arguments": [{
            "n": "none",
            "b": "block",
            "f": "flex",
            "i": "inline",
            "ib": "inline-block",
            "tb": "table",
            "tbr": "table-row",
            "tbc": "table-cell",
            "li": "list-item",
            "ri": "run-in",
            "cp": "compact",
            "itb": "inline-table",
            "tbcl": "table-column",
            "tbclg": "table-column-group",
            "tbhg": "table-header-group",
            "tbfg": "table-footer-group",
            "tbrg": "table-row-group"
        }]
    },
    /**
    ==================================================================
    FILTER FUNCTIONS
    http://www.w3.org/TR/filter-effects-1/#FilterProperty
    ==================================================================
    */
    // filter for custom
    {
        "type": "pattern",
        "name": "Filter",
        "matcher": "Fil",
        "allowParamToValue": false,
        "styles": {
            "filter": "$0"
        },
        "arguments": [{
            "n": "none"
        }]
    },
    // blur
    {
        "type": "pattern",
        "name": "Blur (filter)",
        "matcher": "Blur",
        "allowParamToValue": true,
        "styles": {
            "filter": "blur($0)"
        }
    },
    // brightness
    {
        "type": "pattern",
        "name": "Brightness (filter)",
        "matcher": "Brightness",
        "allowParamToValue": true,
        "styles": {
            "filter": "brightness($0)"
        }
    },
    // contrast
    {
        "type": "pattern",
        "name": "Contrast (filter)",
        "matcher": "Contrast",
        "allowParamToValue": true,
        "styles": {
            "filter": "contrast($0)"
        }
    },
    // contrast (only custom)
    {
        "type": "pattern",
        "name": "Drop shadow (filter)",
        "matcher": "Dropshadow",
        "allowParamToValue": false,
        "styles": {
            "filter": "drop-shadow($0)"
        }
    },
    // grayscale
    {
        "type": "pattern",
        "name": "Grayscale (filter)",
        "matcher": "Grayscale",
        "allowParamToValue": true,
        "styles": {
            "filter": "grayscale($0)"
        }
    },
    // hue-rotate
    {
        "type": "pattern",
        "name": "Hue Rotate (filter)",
        "matcher": "HueRotate",
        "allowParamToValue": true,
        "styles": {
            "filter": "hue-rotate($0)"
        }
    },
    // invert
    {
        "type": "pattern",
        "name": "Invert (filter)",
        "matcher": "Invert",
        "allowParamToValue": true,
        "styles": {
            "filter": "invert($0)"
        }
    },
    // opacity
    {
        "type": "pattern",
        "name": "Opacity (filter)",
        "matcher": "Opacity",
        "allowParamToValue": true,
        "styles": {
            "filter": "opacity($0)"
        }
    },
    // saturate
    {
        "type": "pattern",
        "name": "Saturate (filter)",
        "matcher": "Saturate",
        "allowParamToValue": true,
        "styles": {
            "filter": "saturate($0)"
        }
    },
    // sepia
    {
        "type": "pattern",
        "name": "Sepia (filter)",
        "matcher": "Sepia",
        "allowParamToValue": true,
        "styles": {
            "filter": "sepia($0)"
        }
    },
    /**
    ==================================================================
    FLEX RELATED PROPS
    ==================================================================
    */
    // flex shorthand
    {
        "type": "pattern",
        "name": "Flex",
        "matcher": "Flx",
        "allowParamToValue": false,
        "styles": {
            "flex": "$0"
        },
        "arguments": [{
            "a": "auto",
            "n": "none"
        }]
    },
    // flex-grow
    {
        "type": "pattern",
        "name": "Flex grow",
        "matcher": "Flxg",
        "allowParamToValue": true,
        "styles": {
            "flex-grow": "$0"
        }
    },
    // flex-shrink
    {
        "type": "pattern",
        "name": "Flex",
        "matcher": "Flxs",
        "allowParamToValue": true,
        "styles": {
            "flex-shrink": "$0"
        }
    },
    // flex-basis
    {
        "type": "pattern",
        "name": "Flex",
        "matcher": "Flxb",
        "allowParamToValue": true,
        "styles": {
            "flex-basis": "$0"
        },
        "arguments": [{
            "a": "auto",
            "n": "none"
        }]
    },
    // align-self (previously flex-align)
    // Previous version: http://www.w3.org/TR/2012/WD-css3-flexbox-20120322/#flex-align
    // Latest version: http://www.w3.org/TR/css3-flexbox/#align-items-property
    {
        "type": "pattern",
        "name": "Align self",
        "matcher": "As",
        "allowParamToValue": false,
        "styles": {
            "align-self": "$0"
        },
        "arguments": [{
            "a": "auto",
            "fs": "flex-start",
            "fe": "flex-end",
            "c": "center",
            "b": "baseline",
            "st": "stretch"
        }]
    },
    // flex-direction
    {
        "type": "pattern",
        "name": "Flex direction",
        "matcher": "Fld",
        "allowParamToValue": false,
        "styles": {
            "flex-direction": "$0"
        },
        "arguments": [{
            "r": "row",
            "rr": "row-reverse",
            "c": "column",
            "cr": "column-reverse"
        }]
    },
    // flex-flow
    {
        "type": "pattern",
        "name": "Flex flow",
        "matcher": "Flf",
        "allowParamToValue": false,
        "styles": {
            "flex-flow": "$0"
        },
        "arguments": [{
            "r": "row",
            "rr": "row-reverse",
            "c": "column",
            "cr": "column-reverse",
            "nw": "nowrap",
            "w": "wrap",
            "wr": "wrap-reverse"
        }]
    },
    // align-items (previously flex-item-align)
    // Previous version: http://www.w3.org/TR/2012/WD-css3-flexbox-20120322/#flex-align
    // Latest version: http://www.w3.org/TR/css3-flexbox/#align-items-property
    {
        "type": "pattern",
        "name": "Align items",
        "matcher": "Ai",
        "allowParamToValue": false,
        "styles": {
            "align-items": "$0"
        },
        "arguments": [{
            "fs": "flex-start",
            "fe": "flex-end",
            "c": "center",
            "b": "baseline",
            "st": "stretch"
        }]
    },
    // align-content (previously flex-line-pack)
    // Source: http://msdn.microsoft.com/en-us/library/ie/jj127302%28v=vs.85%29.aspx
    // Previous version: http://www.w3.org/TR/2012/WD-css3-flexbox-20120322/#flex-line-pack
    // Latest version: http://www.w3.org/TR/css3-flexbox/#align-content-property
    {
        "type": "pattern",
        "name": "Align content",
        "matcher": "Ac",
        "allowParamToValue": false,
        "styles": {
            "align-content": "$0"
        },
        "arguments": [{
            "fs": "flex-start",
            "fe": "flex-end",
            "c": "center",
            "sb": "space-between",
            "sa": "space-around",
            "st": "stretch"
        }]
    },
    // order (previously flex-order)
    // Previous version: http://www.w3.org/TR/2012/WD-css3-flexbox-20120322/#flex-order
    // Latest version: http://www.w3.org/TR/css3-flexbox/#order-property
    {
        "type": "pattern",
        "name": "Order",
        "matcher": "Or",
        "allowParamToValue": true,
        "styles": {
            "order": "$0"
        }
    },
    // justify-content (previously flex-pack)
    // Previous version: http://www.w3.org/TR/2012/WD-css3-flexbox-20120322/#flex-pack
    // Latest version: http://www.w3.org/TR/css3-flexbox/#justify-content-property
    {
        "type": "pattern",
        "name": "Justify content",
        "matcher": "Jc",
        "allowParamToValue": false,
        "styles": {
            "justify-content": "$0"
        },
        "arguments": [{
            "fs": "flex-start",
            "fe": "flex-end",
            "c": "center",
            "sb": "space-between",
            "sa": "space-around"
        }]
    },
    // flex-wrap
    {
        "type": "pattern",
        "name": "Flex-wrap",
        "matcher": "Flw",
        "allowParamToValue": false,
        "styles": {
            "flex-wrap": "$0"
        },
        "arguments": [{
            "nw": "nowrap",
            "w": "wrap",
            "wr": "wrap-reverse"
        }]
    },
    /**
    ==================================================================
    FLOAT
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Float",
        "allowParamToValue": false,
        "matcher": "Fl",
        "styles": {
            "float": "$0"
        },
        "arguments": [{
            "n": "none",
            "start": "__START__",
            "end": "__END__"
        }]
    },
    /**
    ==================================================================
    FONT FAMILY param matches generic font-family
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Font family",
        "matcher": "Ff",
        "allowParamToValue": false,
        "styles": {
            "font-family": "$0"
        },
        "arguments": [{
            "c": "\"Monotype Corsiva\", \"Comic Sans MS\", cursive",
            "f": "Capitals, Impact, fantasy",
            "m": "Monaco, \"Courier New\", monospace",
            "s": "Georgia, \"Times New Roman\", serif",
            "ss": "Helvetica, Arial, sans-serif"
        }]
    },
    /**
    ==================================================================
    FONT-WEIGHT
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Font weight",
        "matcher": "Fw",
        "allowParamToValue": false,
        "styles": {
            "font-weight": "$0"
        },
        "arguments": [{
            "100": "100",
            "200": "200",
            "300": "300",
            "400": "400",
            "500": "500",
            "600": "600",
            "700": "700",
            "800": "800",
            "900": "900",
            "b": "bold",
            "br": "bolder",
            "lr": "lighter",
            "n": "normal"
        }]
    },
    /**
    ==================================================================
    FONT-SIZE
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Font size",
        "matcher": "Fz",
        "allowParamToValue": true,
        "styles": {
            "font-size": "$0"
        }
    },
    /**
     ==================================================================
     FONT-STYLE
     ==================================================================
     */
    {
        "type": "pattern",
        "name": "Font style",
        "matcher": "Fs",
        "allowParamToValue": false,
        "styles": {
            "font-style": "$0"
        },
        "arguments": [{
            "n": "normal",
            "i": "italic",
            "o": "oblique"
        }]
    },
    /**
    ==================================================================
    FONT-VARIANT
    ==================================================================
    */
    // TODO: This rule has a lot more acceptable values.
    // http://dev.w3.org/csswg/css-fonts/#propdef-font-variant
    // https://developer.mozilla.org/en-US/docs/Web/CSS/font-variant
    {
        "type": "pattern",
        "name": "Font variant",
        "matcher": "Fv",
        "allowParamToValue": false,
        "styles": {
            "font-variant": "$0"
        },
        "arguments": [{
            "n": "normal",
            "sc": "small-caps"
        }]
    },
    /**
    ==================================================================
    HEIGHT
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Height",
        "matcher": "H",
        "allowParamToValue": true,
        "styles": {
            "height": "$0"
        },
        "arguments": [{
            "0": "0",
            "a": "auto",
            "av": "available",
            "bb": "border-box",
            "cb": "content-box",
            "fc": "fit-content",
            "maxc": "max-content",
            "minc": "min-content"
        }]
    },
    /**
    ==================================================================
    HYPHENS
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Hyphens",
        "matcher": "Hy",
        "allowParamToValue": false,
        "styles": {
            "hyphens": "$0"
        },
        "arguments": [{
            "a": "auto",
            "n": "normal",
            "m": "manual"
        }]
    },
    /**
    ==================================================================
    LETTER-SPACING
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Letter spacing",
        "matcher": "Lts",
        "allowParamToValue": true,
        "styles": {
            "letter-spacing": "$0"
        },
        "arguments": [{
            "n": "normal"
        }]
    },
    /**
    ==================================================================
    LIST-STYLE-TYPE
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "List style type",
        "matcher": "List",
        "allowParamToValue": false,
        "styles": {
            "list-style-type": "$0"
        },
        "arguments": [{
            "n": "none",
            "d": "disc",
            "c": "circle",
            "s": "square",
            "dc": "decimal",
            "dclz": "decimal-leading-zero",
            "lr": "lower-roman",
            "lg": "lower-greek",
            "ll": "lower-latin",
            "ur": "upper-roman",
            "ul": "upper-latin",
            "a": "armenian",
            "g": "georgian",
            "la": "lower-alpha",
            "ua": "upper-alpha"
        }]
    },
    /**
    ==================================================================
    LIST-STYLE-POSITION
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "List style position",
        "matcher": "Lisp",
        "allowParamToValue": false,
        "styles": {
            "list-style-position": "$0"
        },
        "arguments": [{
            "i": "inside",
            "o": "outside"
        }]
    },
    /**
    ==================================================================
    LIST-STYLE-IMAGE
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "List style image",
        "matcher": "Lisi",
        "allowParamToValue": false,
        "styles": {
            "list-style-image": "$0"
        },
        "arguments": [{
            "n": "none"
        }]
    },
    /**
    ==================================================================
    LINE-HEIGHT
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Line height",
        "matcher": "Lh",
        "allowParamToValue": true,
        "styles": {
            "line-height": "$0"
        },
        "arguments": [{
            "n": "normal"
        }]
    },
    /**
    ==================================================================
    MARGINS
    ==================================================================
    */
    // all edges
    {
        "type": "pattern",
        "name": "Margin (all edges)",
        "matcher": "M",
        "allowParamToValue": true,
        "styles": {
            "margin": "$0"
        },
        "arguments": [{
            "0": "0",
            "a": "auto"
        }]
    },
    // X axis
    {
        "type": "pattern",
        "name": "Margin (X axis)",
        "matcher": "Mx",
        "allowParamToValue": true,
        "styles": {
            "margin-__START__": "$0",
            "margin-__END__": "$0"
        },
        "arguments": [{
            "0": "0",
            "a": "auto",
        }]
    },
    // Y axis
    {
        "type": "pattern",
        "name": "Margin (Y axis)",
        "matcher": "My",
        "allowParamToValue": true,
        "styles": {
            "margin-top": "$0",
            "margin-bottom": "$0"
        },
        "arguments": [{
            "0": "0",
            "a": "auto"
        }]
    },
    // top
    {
        "type": "pattern",
        "name": "Margin top",
        "matcher": "Mt",
        "allowParamToValue": true,
        "styles": {
            "margin-top": "$0"
        },
        "arguments": [{
            "0": "0",
            "a": "auto"
        }]
    },
    // end
    {
        "type": "pattern",
        "name": "Margin end",
        "matcher": "Mend",
        "allowParamToValue": true,
        "styles": {
            "margin-__END__": "$0"
        },
        "arguments": [{
            "0": "0",
            "a": "auto"
        }]
    },
    // bottom
    {
        "type": "pattern",
        "name": "Margin bottom",
        "matcher": "Mb",
        "allowParamToValue": true,
        "styles": {
            "margin-bottom": "$0"
        },
        "arguments": [{
            "0": "0",
            "a": "auto"
        }]
    },
    // start
    {
        "type": "pattern",
        "name": "Margin start",
        "matcher": "Mstart",
        "allowParamToValue": true,
        "styles": {
            "margin-__START__": "$0"
        },
        "arguments": [{
            "0": "0",
            "a": "auto"
        }]
    },
    /**
    ==================================================================
    MAX-HEIGHT
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Max height",
        "matcher": "Mah",
        "allowParamToValue": true,
        "styles": {
            "max-height": "$0"
        },
        "arguments": [{
            "a": "auto",
            "maxc": "max-content",
            "minc": "min-content",
            "fa": "fill-available",
            "fc": "fit-content"
        }]
    },
    /**
    ==================================================================
    MAX-WIDTH
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Max width",
        "matcher": "Maw",
        "allowParamToValue": true,
        "styles": {
            "max-width": "$0"
        },
        "arguments": [{
            "a": "auto",
            "fa": "fill-available",
            "fc": "fit-content",
            "maxc": "max-content",
            "minc": "min-content"
        }]
    },
    /**
    ==================================================================
    MIN-HEIGHT
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Min height",
        "matcher": "Mih",
        "allowParamToValue": true,
        "styles": {
            "min-height": "$0"
        },
        "arguments": [{
            "a": "auto",
            "fa": "fill-available",
            "fc": "fit-content",
            "maxc": "max-content",
            "minc": "min-content"
        }]
    },
    /**
    ==================================================================
    MIN-WIDTH
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Min width",
        "matcher": "Miw",
        "allowParamToValue": true,
        "styles": {
            "min-width": "$0"
        },
        "arguments": [{
            "a": "auto",
            "fa": "fill-available",
            "fc": "fit-content",
            "maxc": "max-content",
            "minc": "min-content"
        }]
    },
    /**
    ==================================================================
    OUTLINE
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Outline",
        "matcher": "O",
        "allowParamToValue": false,
        "styles": {
            "outline": "$0"
        },
        "arguments": [{
            "0": "0",
            "n": "none"
        }]
    },
    /**
    ==================================================================
    OFFSETS
    ==================================================================
    */
    // top
    {
        "type": "pattern",
        "name": "Top",
        "matcher": "T",
        "allowParamToValue": true,
        "styles": {
            "top": "$0"
        },
        "arguments": [{
            "a": "auto"
        }]
    },
    // end
    {
        "type": "pattern",
        "name": "End",
        "matcher": "End",
        "allowParamToValue": true,
        "styles": {
            "__END__": "$0"
        },
        "arguments": [{
            "a": "auto"
        }]
    },
    // bottom
    {
        "type": "pattern",
        "name": "Bottom",
        "matcher": "B",
        "allowParamToValue": true,
        "styles": {
            "bottom": "$0"
        },
        "arguments": [{
            "a": "auto"
        }]
    },
    // start
    {
        "type": "pattern",
        "name": "Start",
        "matcher": "Start",
        "allowParamToValue": true,
        "styles": {
            "__START__": "$0"
        },
        "arguments": [{
            "a": "auto"
        }]
    },
    /**
    ==================================================================
    OPACITY
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Opacity",
        "matcher": "Op",
        "allowParamToValue": true,
        "styles": {
            "opacity": "$0"
        },
        "arguments": [{
            "0": "0",
            "1": "1"
        }]
    },
    /**
    ==================================================================
    OVERFLOW
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Overflow",
        "matcher": "Ov",
        "allowParamToValue": false,
        "styles": {
            "overflow": "$0"
        },
        "arguments": [{
            "a": "auto",
            "h": "hidden",
            "s": "scroll",
            "v": "visible"
        }]
    },
    /**
    ==================================================================
    OVERFLOW-X
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Overflow (X axis)",
        "matcher": "Ovx",
        "allowParamToValue": false,
        "styles": {
            "overflow-x": "$0"
        },
        "arguments": [{
            "a": "auto",
            "h": "hidden",
            "s": "scroll",
            "v": "visible"
        }]
    },
    /**
    ==================================================================
    OVERFLOW-Y
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Overflow (Y axis)",
        "matcher": "Ovy",
        "allowParamToValue": false,
        "styles": {
            "overflow-y": "$0"
        },
        "arguments": [{
            "a": "auto",
            "h": "hidden",
            "s": "scroll",
            "v": "visible"
        }]
    },
    /**
    ==================================================================
    OVERFLOW-SCROLLING (-webkit-)
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Overflow scrolling",
        "matcher": "Ovs",
        "allowParamToValue": false,
        "styles": {
            "-webkit-overflow-scrolling": "$0"
        },
        "arguments": [{
            "a": "auto",
            "touch": "touch"
        }]
    },
    /**
    ==================================================================
    PADDING
    ==================================================================
    */
    // all edges
    {
        "type": "pattern",
        "name": "Padding (all edges)",
        "matcher": "P",
        "allowParamToValue": true,
        "styles": {
            "padding": "$0"
        }
    },
    // X axis
    {
        "type": "pattern",
        "name": "Padding (X axis)",
        "matcher": "Px",
        "allowParamToValue": true,
        "styles": {
            "padding-__START__": "$0",
            "padding-__END__": "$0"
        }
    },
    // Y axis
    {
        "type": "pattern",
        "name": "Padding (Y axis)",
        "matcher": "Py",
        "allowParamToValue": true,
        "styles": {
            "padding-top": "$0",
            "padding-bottom": "$0"
        }
    },
    // top
    {
        "type": "pattern",
        "name": "Padding top",
        "matcher": "Pt",
        "allowParamToValue": true,
        "styles": {
            "padding-top": "$0"
        }
    },
    // end
    {
        "type": "pattern",
        "name": "Padding end",
        "matcher": "Pend",
        "allowParamToValue": true,
        "styles": {
            "padding-__END__": "$0"
        }
    },
    // bottom
    {
        "type": "pattern",
        "name": "Padding bottom",
        "matcher": "Pb",
        "allowParamToValue": true,
        "styles": {
            "padding-bottom": "$0"
        }
    },
    // start
    {
        "type": "pattern",
        "name": "Padding start",
        "matcher": "Pstart",
        "allowParamToValue": true,
        "styles": {
            "padding-__START__": "$0"
        }
    },
    /**
    ==================================================================
    POINTER-EVENTS
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Pointer events",
        "matcher": "Pe",
        "allowParamToValue": false,
        "styles": {
            "pointer-events": "$0"
        },
        "arguments": [{
            "a": "auto",
            "all": "all",
            "f": "fill",
            "n": "none",
            "p": "painted",
            "s": "stroke",
            "v": "visible",
            "vf": "visibleFill",
            "vp": "visiblePainted",
            "vs": "visibleStroke"
        }]
    },
    /**
    ==================================================================
    POSITION
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Position",
        "matcher": "Pos",
        "allowParamToValue": false,
        "styles": {
            "position": "$0"
        },
        "arguments": [{
            "a": "absolute",
            "f": "fixed",
            "r": "relative",
            "s": "static",
            "st": "sticky"
        }]
    },
    /**
    ==================================================================
    TABLE-LAYOUT (checked)
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Table layout",
        "matcher": "Tbl",
        "allowParamToValue": false,
        "styles": {
            "table-layout": "$0"
        },
        "arguments": [{
            "a": "auto",
            "f": "fixed"
        }]
    },
    /**
    ==================================================================
    TEXT-ALIGN
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Text align",
        "matcher": "Ta",
        "allowParamToValue": false,
        "styles": {
            "text-align": "$0"
        },
        "arguments": [{
            "c": "center",
            "e": "end",
            "end": "__END__",
            "j": "justify",
            "mp": "match-parent",
            "s": "start",
            "start": "__START__"
        }]
    },
    /**
    ==================================================================
    TEXT-ALIGN-LAST
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Text align last",
        "matcher": "Tal",
        "allowParamToValue": false,
        "styles": {
            "text-align-last": "$0"
        },
        "arguments": [{
            "a": "auto",
            "c": "center",
            "e": "end",
            "end": "__END__",
            "j": "justify",
            "s": "start",
            "start": "__START__"
        }]
    },
    /**
    ==================================================================
    TEXT-DECORATION
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Text decoration",
        "matcher": "Td",
        "allowParamToValue": false,
        "styles": {
            "text-decoration": "$0"
        },
        "arguments": [{
            "lt": "line-through",
            "n": "none",
            "o": "overline",
            "u": "underline"
        }]
    },
    /**
    ==================================================================
    TEXT-INDENT
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Text indent",
        "matcher": "Ti",
        "allowParamToValue": true,
        "styles": {
            "text-indent": "$0"
        }
    },
    /**
    ==================================================================
    TEXT-OVERFLOW
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Text overflow",
        "matcher": "Tov",
        "allowParamToValue": false,
        "styles": {
            "text-overflow": "$0"
        },
        "arguments": [{
            "c": "clip",
            "e": "ellipsis"
        }]
    },
    /**
    ==================================================================
    TEXT-RENDERING
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Text rendering",
        "matcher": "Tren",
        "allowParamToValue": false,
        "styles": {
            "text-rendering": "$0"
        },
        "arguments": [{
            "a": "auto",
            "os": "optimizeSpeed",
            "ol": "optimizeLegibility",
            "gp": "geometricPrecision"
        }]
    },
    /**
    ==================================================================
    TEXT-REPLACE
    http://www.w3.org/TR/2007/WD-css3-gcpm-20070504/
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Text replace",
        "matcher": "Tr",
        "allowParamToValue": false,
        "styles": {
            "text-replace": "$0"
        },
        "arguments": [{
            "n": "none"
        }]
    },
    /**
    ==================================================================
    TEXT-TRANSFORM
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Text transform",
        "matcher": "Tt",
        "allowParamToValue": false,
        "styles": {
            "text-transform": "$0"
        },
        "arguments": [{
            "n": "none",
            "c": "capitalize",
            "u": "uppercase",
            "l": "lowercase"
        }]
    },
    /**
    ==================================================================
    TEXT-SHADOW
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Text shadow",
        "matcher": "Tsh",
        "allowParamToValue": false,
        "styles": {
            "text-shadow": "$0"
        },
        "arguments": [{
            "n": "none"
        }]
    },
    /**
    ==================================================================
    TRANSFORM
    http://www.w3.org/TR/css3-3d-transforms/
    ==================================================================
    */
    // transform for custom
    {
        "type": "pattern",
        "name": "Transform",
        "matcher": "Trf",
        "allowParamToValue": false,
        "styles": {
            "transform": "$0"
        }
    },
    // transform-origin
    {
        "type": "pattern",
        "name": "Transform origin",
        "matcher": "Trfo",
        "allowParamToValue": true,
        "styles": {
            "transform-origin": "$0 $1"
        },
        "arguments": [{
            "t": "top",
            "end": "__END__",
            "bottom": "bottom",
            "start": "__START__",
            "c": "center"
        },{
            "t": "top",
            "end": "__END__",
            "bottom": "bottom",
            "start": "__START__",
            "c": "center"
        }]
    },
    // transform-style
    {
        "type": "pattern",
        "name": "Transform style",
        "matcher": "Trfs",
        "allowParamToValue": false,
        "styles": {
            "transform-style": "$0"
        },
        "arguments": [{
            "f": "flat",
            "p": "preserve-3d"
        }]
    },
    // perspective
    {
        "type": "pattern",
        "name": "Perspective",
        "matcher": "Prs",
        "allowParamToValue": true,
        "styles": {
            "perspective": "$0"
        },
        "arguments": [{
            "n": "none"
        }]
    },
    // perspective-origin
    {
        "type": "pattern",
        "name": "Perspective origin",
        "matcher": "Prso",
        "allowParamToValue": true,
        "styles": {
            "perspective-origin": "$0 $1"
        },
        "arguments": [{
            "t": "top",
            "end": "__END__",
            "bottom": "bottom",
            "start": "__START__",
            "c": "center"
        },{
            "t": "top",
            "end": "__END__",
            "bottom": "bottom",
            "start": "__START__",
            "c": "center"
        }]
    },
    // backface-visibility
    {
        "type": "pattern",
        "name": "Backface visibility",
        "matcher": "Bfv",
        "allowParamToValue": false,
        "styles": {
            "backface-visibility": "$0"
        },
        "arguments": [{
            "h": "hidden",
            "v": "visible"
        }]
    },
    // matrix
    {
        "type": "pattern",
        "name": "Matrix (transform)",
        "matcher": "Matrix",
        "allowParamToValue": false,
        "styles": {
            "transform": "matrix($0)"
        }
    },
    // matrix3d
    {
        "type": "pattern",
        "name": "Matrix 3d (transform)",
        "matcher": "Matrix3d",
        "allowParamToValue": false,
        "styles": {
            "transform": "matrix($0)"
        }
    },
    // rotate
    {
        "type": "pattern",
        "name": "Rotate (transform)",
        "matcher": "Rotate",
        "allowParamToValue": true,
        "styles": {
            "transform": "rotate($0)"
        }
    },
    // rotate3d
    {
        "type": "pattern",
        "name": "Rotate 3d (transform)",
        "matcher": "Rotate3d",
        "allowParamToValue": true,
        "styles": {
            "transform": "rotate3d($0,$1,$2,$3)"
        }
    },
    // rotateX
    {
        "type": "pattern",
        "name": "RotateX (transform)",
        "matcher": "RotateX",
        "allowParamToValue": true,
        "styles": {
            "transform": "rotateX($0)"
        }
    },
    // rotateY
    {
        "type": "pattern",
        "name": "RotateY (transform)",
        "matcher": "RotateY",
        "allowParamToValue": true,
        "styles": {
            "transform": "rotateY($0)"
        }
    },
    // rotateZ
    {
        "type": "pattern",
        "name": "RotateZ (transform)",
        "matcher": "RotateZ",
        "allowParamToValue": true,
        "styles": {
            "transform": "rotateZ($0)"
        }
    },
    // scale
    {
        "type": "pattern",
        "name": "Scale (transform)",
        "matcher": "Scale",
        "allowParamToValue": true,
        "styles": {
            "transform": "scale($0,$1)"
        }
    },
    // scale3d
    {
        "type": "pattern",
        "name": "Scale 3d (transform)",
        "matcher": "Scale3d",
        "allowParamToValue": true,
        "styles": {
            "transform": "scale3d($0,$1,$2)"
        }
    },
    // scaleX
    {
        "type": "pattern",
        "name": "ScaleX (transform)",
        "matcher": "ScaleX",
        "allowParamToValue": true,
        "styles": {
            "transform": "scaleX($0)"
        }
    },
    // scaleY
    {
        "type": "pattern",
        "name": "ScaleY (transform)",
        "matcher": "ScaleY",
        "allowParamToValue": true,
        "styles": {
            "transform": "scaleY($0)"
        }
    },
    // skew
    {
        "type": "pattern",
        "name": "Skew (transform)",
        "matcher": "Skew",
        "allowParamToValue": true,
        "styles": {
            "transform": "skew($0,$1)"
        }
    },
    // skewX
    {
        "type": "pattern",
        "name": "SkewX (transform)",
        "matcher": "SkewX",
        "allowParamToValue": true,
        "styles": {
            "transform": "skewX($0)"
        }
    },
    // skewY
    {
        "type": "pattern",
        "name": "SkewY (transform)",
        "matcher": "SkewY",
        "allowParamToValue": true,
        "styles": {
            "transform": "skewY($0)"
        }
    },
    // translate
    {
        "type": "pattern",
        "name": "Translate (transform)",
        "matcher": "Translate",
        "allowParamToValue": true,
        "styles": {
            "transform": "translate($0,$1)"
        }
    },
    // translate3d
    {
        "type": "pattern",
        "name": "Translate 3d (transform)",
        "matcher": "Translate3d",
        "allowParamToValue": true,
        "styles": {
            "transform": "translate3d($0,$1,$2)"
        }
    },
    // translateX
    {
        "type": "pattern",
        "name": "Translate X (transform)",
        "matcher": "TranslateX",
        "allowParamToValue": true,
        "styles": {
            "transform": "translateX($0)"
        }
    },
    // translateY
    {
        "type": "pattern",
        "name": "Translate Y (transform)",
        "matcher": "TranslateY",
        "allowParamToValue": true,
        "styles": {
            "transform": "translateY($0)"
        }
    },
    // translateZ
    {
        "type": "pattern",
        "name": "Translate Z (transform)",
        "matcher": "TranslateZ",
        "allowParamToValue": true,
        "styles": {
            "transform": "translateZ($0)"
        }
    },
    /**
    ==================================================================
    TRANSITION
    ==================================================================
    */
    // transition shorthand
    {
        "type": "pattern",
        "name": "Transition",
        "matcher": "Trs",
        "allowParamToValue": false,
        "styles": {
            "transition": "$0"
        }
    },
    // transition-delay
    {
        "type": "pattern",
        "name": "Transition delay",
        "matcher": "Trsde",
        "allowParamToValue": true,
        "styles": {
            "transition-delay": "$0"
        },
        "arguments": [{
            "i": "initial"
        }]
    },
    // transition-duration
    {
        "type": "pattern",
        "name": "Transition duration",
        "matcher": "Trsdu",
        "allowParamToValue": true,
        "styles": {
            "transition-duration": "$0"
        }
    },
    // transition-property
    {
        "type": "pattern",
        "name": "Transition property",
        "matcher": "Trsp",
        "allowParamToValue": true,
        "styles": {
            "transition-property": "$0"
        },
        "arguments": [{
            "a": "all"
        }]
    },
    // transition-timing-function
    {
        "type": "pattern",
        "name": "Transition timing function",
        "matcher": "Trstf",
        "allowParamToValue": false,
        "styles": {
            "transition-timing-function": "$0"
        },
        "arguments": [{
            "e": "ease",
            "ei": "ease-in",
            "eo": "ease-out",
            "eio": "ease-in-out",
            "l": "linear",
            "ss": "step-start",
            "se": "step-end"
        }]
    },
    /**
    ==================================================================
    USER-SELECT
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "User select",
        "matcher": "Us",
        "allowParamToValue": false,
        "styles": {
            "user-select": "$0"
        },
        "arguments": [{
            "a": "all",
            "el": "element",
            "els": "elements",
            "n": "none",
            "t": "text",
            "to": "toggle"
        }]
    },
    /**
    ==================================================================
    VERTICAL-ALIGN
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Vertical align",
        "matcher": "Va",
        "allowParamToValue": false,
        "styles": {
            "vertical-align": "$0"
        },
        "arguments": [{
            "b": "bottom",
            "bl": "baseline",
            "m": "middle",
            "sub": "sub",
            "sup": "super",
            "t": "top",
            "tb": "text-bottom",
            "tt": "text-top"
        }]
    },
    /**
    ==================================================================
    VISIBILITY
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Visibility",
        "matcher": "V",
        "allowParamToValue": false,
        "styles": {
            "visibility": "$0"
        },
        "arguments": [{
            "v": "visible",
            "h": "hidden",
            "c": "collapse"
        }]
    },
    /**
    ==================================================================
    WHITE-SPACE
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "White space",
        "matcher": "Whs",
        "allowParamToValue": false,
        "styles": {
            "white-space": "$0"
        },
        "arguments": [{
            "n": "normal",
            "p": "pre",
            "nw": "nowrap",
            "pw": "pre-wrap",
            "pl": "pre-line"
        }]
    },
    /**
    ==================================================================
    WHITE-SPACE-COLLAPSE
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "White space collapse",
        "matcher": "Whsc",
        "allowParamToValue": false,
        "styles": {
            "white-space-collapse": "$0"
        },
        "arguments": [{
            "n": "normal",
            "ka": "keep-all",
            "l": "loose",
            "bs": "break-strict",
            "ba": "break-all"
        }]
    },
    /**
    ==================================================================
    WIDTH
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Width",
        "matcher": "W",
        "allowParamToValue": true,
        "styles": {
            "width": "$0"
        },
        "arguments": [{
            "0": "0",
            "a": "auto",
            "bb": "border-box",
            "cb": "content-box",
            "av": "available",
            "minc": "min-content",
            "maxc": "max-content",
            "fc": "fit-content"
        }]
    },
    /**
    ==================================================================
    WORD-BREAK
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Word break",
        "matcher": "Wob",
        "allowParamToValue": false,
        "styles": {
            "word-break": "$0"
        },
        "arguments": [{
            "ba": "break-all",
            "ka": "keep-all",
            "n": "normal"
        }]
    },
    /**
    ==================================================================
    WORD-WRAP (not part of the spec)
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Word wrap",
        "matcher": "Wow",
        "allowParamToValue": false,
        "styles": {
            "word-wrap": "$0"
        },
        "arguments": [{
            "bw": "break-word",
            "n": "normal"
        }]
    },
    /**
    ==================================================================
    Z-INDEX
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Z index",
        "matcher": "Z",
        "allowParamToValue": true,
        "styles": {
            "z-index": "$0"
        },
        "arguments": [{
            "a": "auto"
        }]
    },
    /**
    ==================================================================
    SVG
    ==================================================================
    */
    {
        "type": "pattern",
        "name": "Fill (SVG)",
        "matcher": "Fill",
        "allowParamToValue": false,
        "styles": {
            "fill": "$0"
        },
        "arguments": [colors]
    },
    {
        "type": "pattern",
        "name": "Stroke (SVG)",
        "matcher": "Stk",
        "allowParamToValue": false,
        "styles": {
            "stroke": "$0"
        },
        "arguments": [colors]
    },
    {
        "type": "pattern",
        "name": "Stroke width (SVG)",
        "matcher": "Stkw",
        "allowParamToValue": true,
        "styles": {
            "stroke-width": "$0"
        },
        "arguments": [{
            "i": "inherit"
        }]
    },
    {
        "type": "pattern",
        "name": "Stroke linecap (SVG)",
        "matcher": "Stklc",
        "allowParamToValue": false,
        "styles": {
            "stroke-linecap": "$0"
        },
        "arguments": [{
            "i": "inherit",
            "b": "butt",
            "r": "round",
            "s": "square"
        }]
    },
    {
        "type": "pattern",
        "name": "Stroke linejoin (SVG)",
        "matcher": "Stklj",
        "allowParamToValue": false,
        "styles": {
            "stroke-linejoin": "$0"
        },
        "arguments": [{
            "i": "inherit",
            "b": "bevel",
            "r": "round",
            "m": "miter"
        }]
    }
];

},{"./colors":4}],"Atomizer":[function(require,module,exports){
/*
 * Copyright (c) 2015, Yahoo Inc. All rights reserved.
 * Copyrights licensed under the New BSD License.
 * See the accompanying LICENSE file for terms.
 */

'use strict';

var _ = require('lodash');
var utils = require('./lib/utils');
var JSS = require('./lib/jss');
var Grammar = require('./lib/grammar');
var objectAssign = require('object-assign');
var XRegExp = require('xregexp').XRegExp;

var RULES = require('./rules.js').concat(require('./helpers.js'));

/**
 * constructor
 */
function Atomizer(options/*:AtomizerOptions*/, rules/*:AtomizerRules*/) {
    this.verbose = options && options.verbose || false;
    this.rules = [];
    // we have two different objects to avoid name collision
    this.rulesMap = {};
    this.helpersMap = {};

    // add rules
    this.addRules(rules || RULES);
}

/**
 * addRules
 * @public
 */
Atomizer.prototype.addRules = function(rules/*:AtomizerRules*/)/*:void*/ {
    rules.forEach(function (rule) {
        var ruleFound = rule.type === 'pattern' && this.rulesMap.hasOwnProperty(rule.matcher);
        var helperFound = rule.type === 'helper' && this.helpersMap.hasOwnProperty(rule.matcher);

        if ((ruleFound && !_.isEqual(this.rules[this.rulesMap[rule.matcher]], rule)) ||
                (helperFound && !_.isEqual(this.rules[this.helpersMap[rule.matcher]], rule))) {
            throw new Error('Rule ' + rule.matcher + ' already exists with a different defintion.');
        }

        if (!ruleFound && !helperFound) {
            // push new rule to this.rules and update rulesMap
            this.rules.push(rule);

            if (rule.type === 'pattern') {
                this.rulesMap[rule.matcher] = this.rules.length - 1;
            } else {
                this.helpersMap[rule.matcher] = this.rules.length - 1;
            }
        }
    }, this);

    // invalidates syntax
    this.syntax = null;
    this.syntaxSimple = null;
};

/**
 * getClassNameSyntax()
 * @private
 */
Atomizer.prototype.getSyntax = function (isSimple)/*:string*/ {

    if (isSimple && !this.syntaxSimple) {
        this.syntaxSimple = new Grammar(this.rules).getSyntax(true);
    }
    if (!isSimple && !this.syntax) {
       // All Grammar and syntax parsing  should be in the Grammar class
       this.syntax = new Grammar(this.rules).getSyntax();
    }

    return isSimple ? this.syntaxSimple : this.syntax;
};

/**
 * findClassNames
 */
Atomizer.prototype.findClassNames = function (src/*:string*/)/*:string[]*/ {
    // using object to remove dupes
    var classNamesObj = {};
    var className;
    var classNameSyntax = this.getSyntax();
    var match = classNameSyntax.exec(src);

    while (match !== null) {
        // strip boundary character
        className = match[1];

        // assign to classNamesObj as key and give it a counter
        classNamesObj[className] = (classNamesObj[className] || 0) + 1;

        // run regex again
        match = classNameSyntax.exec(src);
    }

    // return an array of the matched class names
    return _.keys(classNamesObj);
};

/**
 * Get Atomizer config given an array of class names and an optional config object
 * examples:
 *
 * getConfig(['Op(1)', 'D(n):h', 'Fz(heading)'], {
 *     custom: {
 *         heading: '80px'
 *     },
 *     breakPoints: {
 *         'sm': '@media(min-width:500px)',
 *         'md': '@media(min-width:900px)',
 *         'lg': '@media(min-width:1200px)'
 *     },
 *     classNames: ['D(b)']
 * }, {
 *     rtl: true
 * });
 *
 * getConfig(['Op(1)', 'D(n):h']);
 */
Atomizer.prototype.getConfig = function (classNames/*:string[]*/, config/*:AtomizerConfig*/)/*:AtomizerConfig*/ {
    config = config || { classNames: [] };
    // merge classnames with config
    config.classNames = _.union(classNames || [], config.classNames);
    return config;
};

/**
 * return a parsed tree given a config and css options
 */
Atomizer.prototype.parseConfig = function (config/*:AtomizerConfig*/, options/*:CSSOptions*/)/*:Tree*/ {
    var tree = {};
    var classNameSyntax = this.getSyntax(true);
    var warnings = [];
    var isVerbose = !!this.verbose;
    var classNames = config.classNames;

    if (!_.isArray(config.classNames)) { return tree; }
    options = options || {};

    if ('exclude' in config) {
        classNames = _.difference(classNames, config.exclude);
    }

    classNames.forEach(function (className) {
        var match = XRegExp.exec(className, classNameSyntax);
        var rule;
        var ruleIndex;
        var treeo;
        var rgb;
        var values;

        if (!match || (!match.atomicSelector && !match.selector)) {
          // no match, no op
          return;
        }

        // check where this rule belongs to
        // atomicSelector is the class name before the params: e.g. className(param)
        // selector is the class name if params is not required
        // we look both in rules and in helpers where this class belongs to
        if (this.rulesMap.hasOwnProperty(match.atomicSelector)) {
            ruleIndex = this.rulesMap[match.atomicSelector];
        }
        // the atomicSelector can also be a helper that requires params
        else if (this.helpersMap.hasOwnProperty(match.atomicSelector)) {
            ruleIndex = this.helpersMap[match.atomicSelector];
        }
        // or it can be just a class with no params required
        // this is only possible for helper classes as param is required for
        // all atomic classes in rulesMap.
        else if (this.helpersMap.hasOwnProperty(match.selector)) {
            ruleIndex = this.helpersMap[match.selector];
        } else {
            // not a valid class, no op
            return;
        }

        // get the rule that this class name belongs to.
        // this is why we created the dictionary
        // as it will return the index given a matcher.
        rule = this.rules[ruleIndex];

        treeo = {
            className: match[1],
            declarations: _.cloneDeep(rule.styles)
        };

        if (!tree[rule.matcher]) {
            tree[rule.matcher] = [];
        }

        if (match.parentSelector) {
            treeo.parentSelector = match.parentSelector;
        }
        if (match.parent) {
            treeo.parent = match.parent;
        }
        if (match.parentPseudo) {
            treeo.parentPseudo = match.parentPseudo;
        }
        if (match.parentSep) {
            treeo.parentSep = match.parentSep;
        }

        // given values, return their valid form
        if (match.atomicValues) {
            values = match.atomicValues;

            // values can be separated by a comma
            // parse them and return a valid value
            values = values.split(',').map(function (value, index) {
                var matchVal = Grammar.matchValue(value);
                var propAndValue;

                if (matchVal.number) {
                    if (rule.allowParamToValue || rule.type === 'helper') {
                        value = matchVal.number;
                        if (matchVal.unit) {
                            value += matchVal.unit;
                        }
                    } else {
                        // treat as if we matched a named value
                        matchVal.named = [matchVal.number, matchVal.unit].join('');
                    }
                }
                if (matchVal.fraction) {
                    // multiplying by 100 then by 10000 on purpose (instead of just multiplying by 1M),
                    // making clear the steps involved:
                    // percentage: (numerator / denominator * 100)
                    // 4 decimal places:  (Math.round(percentage * 10000) / 10000)
                    value = Math.round(matchVal.numerator / matchVal.denominator * 100 * 10000) / 10000 + '%';
                }
                if (matchVal.hex) {
                    if (matchVal.alpha) {
                        rgb = utils.hexToRgb(matchVal.hex);
                        value = [
                            'rgba(',
                            rgb.r,
                            ',',
                            rgb.g,
                            ',',
                            rgb.b,
                            ',',
                            matchVal.alpha,
                            ')'
                        ].join('');
                    } else {
                        value = matchVal.hex;
                    }
                }
                if (matchVal.named) {
                    // first check if 'inh' is the value
                    if (matchVal.named === 'inh') {
                        value = 'inherit';
                    }
                    // check if the named value matches any of the values
                    // registered in arguments.
                    else if (rule.arguments && index < rule.arguments.length && Object.keys(rule.arguments[index]).indexOf(matchVal.named) >= 0) {
                        value = rule.arguments[index][matchVal.named];
                    }
                    // now check if named value was passed in the config
                    else {
                        propAndValue = [match.atomicSelector, '(', matchVal.named, ')'].join('');

                        // no custom, warn it
                        if (!config.custom) {
                            warnings.push(propAndValue);
                            // set to null so we don't write it to the css
                            value = null;
                        }
                        // as prop + value
                        else if (config.custom.hasOwnProperty(propAndValue)) {
                            value = config.custom[propAndValue];
                        }
                        // as value
                        else if (config.custom.hasOwnProperty(matchVal.named)) {
                            value = config.custom[matchVal.named];
                        }
                        // we have custom but we could not find the named class name there
                        else {
                            warnings.push(propAndValue);
                            // set to null so we don't write it to the css
                            value = null;
                        }
                    }
                }
                return value;
            });
        }

        if (match.valuePseudo) {
            treeo.valuePseudo = match.valuePseudo;
        }

        if (match.breakPoint) {
            treeo.breakPoint = match.breakPoint;
        }

        // before we assign, let's take care of the declarations
        // iterate declarations so we can replace values with their valid form
        for (var prop in treeo.declarations) {
            if (values) {
                values.forEach(function (value, index) {
                    // plug IE hacks for know properties
                    if (options.ie) {
                        // block formatting context on old IE
                        /* istanbul ignore else  */
                        if ((prop === 'display' && value === 'inline-block') || (prop === 'overflow' && value !== 'visible')) {
                            treeo.declarations.zoom = 1;
                        }
                        /* istanbul ignore else  */
                        if (prop === 'display' && value === 'inline-block') {
                            treeo.declarations['*display'] = 'inline';
                        }
                        /* istanbul ignore else  */
                        if (prop === 'opacity') {
                            treeo.declarations.filter = 'alpha(opacity=' + parseFloat(value, 10) * 100 + ')';
                        }
                    }
                    if (value !== null) {
                        // value could be an object for custom classes with breakPoints
                        // e.g.
                        // 'custom': {
                        //     'P($gutter)': {
                        //         default: '10px',
                        //         sm: '12px',
                        //         md: '14px',
                        //         lg: '20px'
                        //     }
                        // }
                        if (_.isObject(value)) {
                            Object.keys(value).forEach(function (bp) {
                                // don't continue if we can't find the breakPoint in the declaration
                                if (!config.hasOwnProperty('breakPoints') || !config.breakPoints.hasOwnProperty(bp)) {
                                    return;
                                }
                                treeo.declarations[config.breakPoints[bp]] = {};
                                treeo.declarations[config.breakPoints[bp]][prop] = treeo.declarations[prop].replace('$' + index, value[bp]);
                            });
                            // handle default value in the custom class
                            if (!value.hasOwnProperty('default')) {
                                // default has not been passed, make sure we delete it
                                delete treeo.declarations[prop];
                            } else {
                                treeo.declarations[prop] = treeo.declarations[prop].replace('$' + index, value.default);
                            }
                        } else {
                            treeo.declarations[prop] = treeo.declarations[prop].replace('$' + index, value);
                        }
                    } else {
                        treeo.declarations = null;
                    }
                });
                // If any of the arguments in the declaration weren't replaced, then we need to clean them up
                if (treeo.declarations && treeo.declarations[prop] && treeo.declarations[prop].indexOf('$') >= 0) {
                    treeo.declarations[prop] = treeo.declarations[prop].replace(/[,\s]?\$\d+/g, '');
                }
            }

            // add important for the following cases:
            //    - `!` was used in the class name
            //    - rule has a parent class, a namespace was given and the rule is not a helper [1]
            // [1] rules with a parent class won't have a namespace attached to the selector since
            //     it prevents people from using the parent class at the root element (<html>). But
            //     to give it extra specificity (to make sure it has more weight than normal atomic
            //     classes) we add important to them. Helper classes don't need it because they do
            //     not share the same namespace.
            if (treeo.declarations && (match.important || (match.parent && options.namespace && rule.type !== 'helper'))) {
                treeo.declarations[prop] += ' !important';
            }
        }

        tree[rule.matcher].push(treeo);
    }, this);

    // throw warnings
    if (isVerbose && warnings.length > 0) {
        warnings.forEach(function (className) {
            console.warn([
                'Warning: Class `' + className + '` is ambiguous, and must be manually added to your config file:',
                '"custom": {',
                '    "' + className + '": <YOUR-CUSTOM-VALUE>',
                '}'
            ].join("\n"));
        });
    }

    return tree;
};

/**
 * Get CSS given an array of class names, a config and css options.
 * examples:
 *
 * getCss({
 *     custom: {
 *         heading: '80px'
 *     },
 *     breakPoints: {
 *         'sm': '@media(min-width:500px)',
 *         'md': '@media(min-width:900px)',
 *         'lg': '@media(min-width:1200px)'
 *     },
 *     classNames: ['D(b)', 'Op(1)', 'D(n):h', 'Fz(heading)']
 * }, {
 *     rtl: true
 * });
 *
 * @public
 */
Atomizer.prototype.getCss = function (config/*:AtomizerConfig*/, options/*:CSSOptions*/)/*:string*/ {
    var jss = {};
    var tree;
    var content = '';
    var breakPoints;

    options = objectAssign({}, {
        // require: [],
        // morph: null,
        banner: '',
        namespace: null,
        rtl: false,
        ie: false
    }, options);

    // validate config.breakPoints
    if (config && config.breakPoints) {
        if (!_.isObject(config.breakPoints)) {
            throw new TypeError('`config.breakPoints` must be an Object');
        }
        /* istanbul ignore else  */
        if (_.size(config.breakPoints) > 0) {
            for(var bp in config.breakPoints) {
                if (!/^@media/.test(config.breakPoints[bp])) {
                    throw new Error('Breakpoint `' + bp + '` must start with `@media`.');
                } else {
                    breakPoints = config.breakPoints;
                }
            }
        }
    }

    // make sense of the config
    tree = this.parseConfig(config, options);

    // write JSS
    // start by iterating rules (we need to follow the order that the rules were declared)
    this.rules.forEach(function (rule) {
        // check if we have a class name that matches this rule
        if (tree[rule.matcher]) {
            tree[rule.matcher].forEach(function(treeo) {
                var breakPoint;
                var selector;

                // if we were not able to find the declaration then don't write anything
                if (!treeo.declarations) {
                    return;
                }

                breakPoint = breakPoints && breakPoints[treeo.breakPoint];

                // this is where we start writing the selector
                selector = Atomizer.escapeSelector(treeo.className);

                // handle parent classname
                if (treeo.parentSelector) {
                    selector = [
                        Atomizer.escapeSelector(treeo.parent),
                        Grammar.getPseudo(treeo.parentPseudo),
                        treeo.parentSep === '_' ? ' ' : [' ', treeo.parentSep, ' '].join(''),
                        '.',
                        selector
                    ].join('');
                }

                // handle pseudo in values
                if (treeo.valuePseudo) {
                    selector = [
                        selector,
                        Grammar.getPseudo(treeo.valuePseudo)
                    ].join('');
                }

                // add the dot for the class
                selector = ['.', selector].join('');

                // add the namespace only if we don't have a parent selector
                if (!treeo.parent) {
                    if (rule.type === 'helper' && options.helpersNamespace) {
                        selector = [options.helpersNamespace, ' ', selector].join('');
                    } else if (rule.type !== 'helper' && options.namespace) {
                        selector = [options.namespace, ' ', selector].join('');
                    }
                }

                // rules are companion classes to the main atomic class
                if (rule.rules) {
                    _.merge(jss, rule.rules);
                }

                // finaly, write the final parts
                // put the declaration to the JSS object with the associated class name
                /* istanbul ignore else */
                if (!jss[selector]) {
                    jss[selector] = {};
                }
                if (breakPoint) {
                    jss[selector][breakPoint] = treeo.declarations;
                } else {
                    jss[selector] = treeo.declarations;
                }
            });
        }
    });

    // convert JSS to CSS
    content = options.banner + JSS.jssToCss(jss);

    // fix the comma problem in Absurd
    content = Atomizer.replaceConstants(content, options.rtl);

    return content;
};

/**
 * Escape CSS selectors with a backslash
 * e.g. ".W-100%" => ".W-100\%"
 */
Atomizer.escapeSelector = function (str/*:string*/)/*:string*/ {
    if (!str && str !== 0) {
        throw new TypeError('str must be present');
    }

    if (str.constructor !== String) {
        return str;
    }

    // TODO: maybe find a better regex? (-?) is here because '-' is considered a word boundary
    // so we get it and put it back to the string.
    return str.replace(/\b(-?)([^-_a-zA-Z0-9\s]+)/g, function (str, dash, characters) {
        return dash + characters.split('').map(function (character) {
            return ['\\', character].join('');
        }).join('');
    });
};

/**
 * Replace LTR/RTL placeholders with actual left/right strings
 */
Atomizer.replaceConstants = function (str/*:string*/, rtl/*:boolean*/) {
    var start = rtl ? 'right' : 'left';
    var end = rtl ? 'left' : 'right';

    if (!str || str.constructor !== String) {
        return str;
    }

    return str.replace(/__START__/g, start).replace(/__END__/g, end);
};

module.exports = Atomizer;

},{"./helpers.js":5,"./lib/grammar":6,"./lib/jss":7,"./lib/utils":8,"./rules.js":9,"lodash":1,"object-assign":2,"xregexp":3}]},{},[]);

var Atomizer = require('Atomizer');
var atomizer = new Atomizer();