From 89125f62a35b8c0ddd1160995cead950b71526e9 Mon Sep 17 00:00:00 2001
From: Thomas Wilkerling <thomas@nextapps.de>
Date: Wed, 13 Feb 2019 13:14:26 +0100
Subject: [PATCH] v0.5.3 Logical Operator

---
 CHANGELOG.md               |   4 +
 README.md                  |  22 ++++-
 dist/flexsearch.compact.js |  45 ++++-----
 dist/flexsearch.es5.js     |  79 +++++++--------
 dist/flexsearch.light.js   |  25 ++---
 dist/flexsearch.min.js     |  66 ++++++-------
 dist/flexsearch.node.js    |  58 +++++------
 flexsearch.js              | 140 ++++++++++++++++----------
 package.json               |   2 +-
 test/test.es6.js           |  44 ++++-----
 test/test.js               | 196 +++++++++++++++++++++++--------------
 11 files changed, 396 insertions(+), 285 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5ea3929..1777e88 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+#### v0.5.3
+
+- Logical Operator
+
 #### v0.5.2
 
 - Intersect Partial Results
diff --git a/README.md b/README.md
index ecc5d32..28c2c26 100644
--- a/README.md
+++ b/README.md
@@ -398,7 +398,7 @@ Library Comparison: <a href="https://raw.githack.com/nextapps-de/flexsearch/mast
 
 > __Note:__ This feature is actually not enabled by default. Read <a href="#contextual_enable">here</a> how to enable.
 
-FlexSearch introduce a new scoring mechanism called __Contextual Search__ which was invented by Thomas Wilkerling, the author of this library. A Contextual Search <a href="https://raw.githack.com/nextapps-de/flexsearch/master/test/benchmark.html" target="_blank">incredibly boost up queries to a complete new level</a> but also requires some additionally memory (depending on ___depth___).
+FlexSearch introduce a new scoring mechanism called __Contextual Search__ which was invented by <a href="https://github.com/ts-thomas" target="_blank">Thomas Wilkerling</a>, the author of this library. A Contextual Search <a href="https://raw.githack.com/nextapps-de/flexsearch/master/test/benchmark.html" target="_blank">incredibly boost up queries to a complete new level</a> but also requires some additionally memory (depending on ___depth___).
 The basic idea of this concept is to limit relevance by its context instead of calculating relevance through the whole (unlimited) distance.<!--Imagine you add a text block of some sentences to an index ID. Assuming the query includes a combination of first and last word from this text block, are they really relevant to each other?-->
 In this way contextual search also <a href="https://raw.githack.com/nextapps-de/flexsearch/master/test/matching.html" target="_blank">improves the results of relevance-based queries</a> on a large amount of text data.
 
@@ -1275,10 +1275,13 @@ var results = index.search("foobar", {
 
 Search the same query on multiple fields:
 
+> Using ___bool___ as a logical operator when searching through multiple fields. The default operator when not set is ___"and"___. It is planned to extend the concept of logical operators to make combinations of ___and___ / ___or___ / ___not___.
+
 ```js
 var results = index.search({
     query: "foobar",
-    field: ["title", "body"]
+    field: ["title", "body"],
+    bool: "or"
 });
 ```
 
@@ -1286,7 +1289,8 @@ Could also be written as:
 
 ```js
 var results = index.search("title", {
-    field: ["title", "body"]
+    field: ["title", "body"],
+    bool: "or"
 });
 ```
 
@@ -1295,13 +1299,16 @@ Search different queries on multiple fields:
 ```js
 var results = index.search([{
     field: "title",
-    query: "foo"
+    query: "foo",
+    bool: "and"
 },{
     field: "body",
-    query: "bar"
+    query: "bar",
+    bool: "and"
 }]);
 ```
 
+<!--
 Boost scoring on specific fields:
 
 ```js
@@ -1315,6 +1322,7 @@ var results = index.search([{
     boost: 0.5
 }]);
 ```
+-->
 
 <a name="where"></a>
 ## Find / Where
@@ -2513,6 +2521,10 @@ node compile SUPPORT_WORKER=true
     </tr>
 </table>
 
+## Contribution
+
+I would be glad about any kind of help. Feel free to contribute to this project and also feel free to contact me (https://github.com/ts-thomas) when you have any questions. There are just one simple (and maybe unusual) coding convention: all public accessible identifiers should be singular.
+
 <a href="CHANGELOG.md">Changelog</a>
 
 ---
diff --git a/dist/flexsearch.compact.js b/dist/flexsearch.compact.js
index 2f81426..7662303 100644
--- a/dist/flexsearch.compact.js
+++ b/dist/flexsearch.compact.js
@@ -1,28 +1,29 @@
 /*
- FlexSearch v0.5.2
+ FlexSearch v0.5.3
  Copyright 2019 Nextapps GmbH
  Author: Thomas Wilkerling
  Released under the Apache 2.0 Licence
  https://github.com/nextapps-de/flexsearch
 */
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diff --git a/dist/flexsearch.es5.js b/dist/flexsearch.es5.js
index 6a85362..5fc2173 100644
--- a/dist/flexsearch.es5.js
+++ b/dist/flexsearch.es5.js
@@ -1,45 +1,46 @@
 /*
- FlexSearch v0.5.2
+ FlexSearch v0.5.3
  Copyright 2019 Nextapps GmbH
  Author: Thomas Wilkerling
  Released under the Apache 2.0 Licence
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 */
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diff --git a/dist/flexsearch.light.js b/dist/flexsearch.light.js
index 4bcbdb1..3bc375f 100644
--- a/dist/flexsearch.light.js
+++ b/dist/flexsearch.light.js
@@ -1,18 +1,19 @@
 /*
- FlexSearch v0.5.2
+ FlexSearch v0.5.3
  Copyright 2019 Nextapps GmbH
  Author: Thomas Wilkerling
  Released under the Apache 2.0 Licence
  https://github.com/nextapps-de/flexsearch
 */
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diff --git a/dist/flexsearch.min.js b/dist/flexsearch.min.js
index dee2187..f78e821 100644
--- a/dist/flexsearch.min.js
+++ b/dist/flexsearch.min.js
@@ -1,39 +1,39 @@
 /*
- FlexSearch v0.5.2
+ FlexSearch v0.5.3
  Copyright 2019 Nextapps GmbH
  Author: Thomas Wilkerling
  Released under the Apache 2.0 Licence
  https://github.com/nextapps-de/flexsearch
 */
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diff --git a/dist/flexsearch.node.js b/dist/flexsearch.node.js
index 7b08a95..c151b07 100644
--- a/dist/flexsearch.node.js
+++ b/dist/flexsearch.node.js
@@ -1,35 +1,35 @@
 /*
- FlexSearch v0.5.2
+ FlexSearch v0.5.3
  Copyright 2019 Nextapps GmbH
  Author: Thomas Wilkerling
  Released under the Apache 2.0 Licence
  https://github.com/nextapps-de/flexsearch
 */
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+a.threshold;a=a.query}if(this.a){let d=f.where,e=f.bool,n=f.sort;g=this.a.index;var k=f.field;if(k)f.field=null,w(k)||(k=[k]);else if(w(f)){var p=f;k=[];for(var m=0;m<f.length;m++){var l=f[m];k[m]=l.field;e=l.bool;n=l.sort;d=l.where}}else k=this.a.keys;m=k.length;for(l=0;l<m;l++)p&&(f=p[l]),h[l]=g[k[l]].search(f);if(c)return c(E.call(this,a,e,h,n,b,d,void 0));if(this.async){const c=this;return new Promise(function(f){Promise.all(h).then(function(g){f(E.call(c,a,e,g,n,b,d,void 0))})})}return E.call(this,
+a,e,h,n,b,d,void 0)}g||(g=this.threshold||0);F(b)?(c=b,b=1E3):b||0===b||(b=1E3);if(!d){if(this.async&&"function"!==typeof importScripts){let a=this;g=new Promise(function(c){setTimeout(function(){c(a.search(f,b,null,!0));a=null})});if(c)g.then(c);else return g;return this}if(c)return c(this.search(f,b,null,!0)),this}if(!a||!C(a))return h;f=a;if(this.cache)if(this.v){if(c=this.j.get(a))return c}else this.j.clear(),this.v=!0;f=this.encode(f);if(!f.length)return h;c=this.f;c=F(c)?c(f):f.split(S);this.filter&&
+(c=D(c,this.filter));p=c.length;d=!0;e=[];const q=r();1<p&&(this.depth?(k=!0,l=c[0],q[l]=1):c.sort(Y));if(!k||(m=this.i)[l]){let a=this.b;for(let b=k?1:0;b<p;b++){const f=c[b];if(f){if(!q[f]){const b=[];let c=!1,h=0;if(l=k?m[l]:this.h){let d;for(let e=0;e<a-g;e++)if(d=l[e][f])b[h++]=d,c=!0}if(c)e[e.length]=1<h?b.concat.apply([],b):b[0];else if(!this.m){d=!1;break}q[f]=1}l=f}}}else d=!1;this.a||(d&&(h=O(e,!1,b,void 0,this.m)),this.cache&&this.j.set(a,h));return h};k.prototype.find=function(a,b){return this.where(a,
+b,1)[0]||null};k.prototype.where=function(a,b,c,d){const e=d||this.g,f=[];let g=0;var k;let r;if("number"===typeof a)return[e[a]];if(C(a)){if(x(b))return[e[a]];if("id"===a)return[e[b]];var p=1;var m=[a.split(":")];r=!0}else{if(F(a)){b=d||Object.keys(e);c=b.length;for(k=0;k<c;k++)p=d?d[k]:e[b[k]],a(p)&&(f[g++]=p);return f}c||(c=b);k=Object.keys(a);p=k.length;r=!1;if(1===p&&"id"===k[0])return[e[a.id]];if((m=this.D)&&!d)for(var l=0;l<m.length;l++){var q=m[l],t=a[q];if(!x(t)){d=this.A[q]["@"+t];if(0===
+--p)return d;k.splice(k.indexOf(q),1);delete a[q];break}}m=Array(p);for(l=0;l<p;l++)m[l]=k[l].split(":")}l=d||Object.keys(e);q=l.length;for(t=0;t<q;t++){const h=d?d[t]:e[l[t]];let n=!0;for(let c=0;c<p;c++){r||(b=a[k[c]]);const d=m[c],e=d.length;let f=h;if(1<e)for(let a=0;a<e;a++)f=f[d[a]];else f=f[d[0]];if(f!==b){n=!1;break}}if(n&&(f[g++]=h,c&&g===c))break}return f};k.prototype.info=function(){let a;let b=0,c=0,d=0;for(var e=0;e<this.b-(this.threshold||0);e++){a=Object.keys(this.h[e]);for(let g=0;g<
+a.length;g++){var f=this.h[e][a[g]].length;b+=1*f+2*a[g].length+4;c+=f;d+=2*a[g].length}}a=Object.keys(this.c);f=a.length;for(e=0;e<f;e++)b+=2*a[e].length+2;return{id:this.id,memory:b,items:f,sequences:c,chars:d,cache:this.cache&&this.cache.l?this.cache.l.length:!1,matcher:L.length+(this.o?this.o.length:0),worker:this.F,threshold:this.threshold,depth:this.depth,contextual:this.depth&&"strict"===this.f}};k.prototype.clear=function(){return this.destroy().init()};k.prototype.destroy=function(){this.cache&&
+(this.j.clear(),this.j=null);this.h=this.i=this.c=null;if(this.a){const a=this.a.keys;for(let b=0;b<a.length;b++)this.a.index[a[b]].destroy();this.a=this.g=null}return this};k.prototype.export=function(){if(this.a){const a=this.a.keys,b=Array(a.length+1);let c=0;for(;c<a.length;c++){const d=this.a.index[a[c]];b[c]=[d.h,d.i,d.c]}b[c]=this.g;return JSON.stringify(b)}return JSON.stringify([this.h,this.i,this.c])};k.prototype.import=function(a){a=JSON.parse(a);if(this.a){const b=this.a.keys,c=b.length;
+for(let d=0;d<c;d++){const e=this.a.index[b[d]];e.h=a[d][0];e.i=a[d][1];e.c=a[d][2];e.g=a[c]}this.g=a[c]}else this.h=a[0],this.i=a[1],this.c=a[2]};const I={icase:function(a){return a.toLowerCase()},simple:function(){const a=[g("[\u00e0\u00e1\u00e2\u00e3\u00e4\u00e5]"),"a",g("[\u00e8\u00e9\u00ea\u00eb]"),"e",g("[\u00ec\u00ed\u00ee\u00ef]"),"i",g("[\u00f2\u00f3\u00f4\u00f5\u00f6\u0151]"),"o",g("[\u00f9\u00fa\u00fb\u00fc\u0171]"),"u",g("[\u00fd\u0177\u00ff]"),"y",g("\u00f1"),"n",g("\u00e7"),"c",g("\u00df"),
+"s",g(" & ")," and ",g("[-/]")," ",g("[^a-z0-9 ]"),"",g("\\s+")," "];return function(b){b=G(b.toLowerCase(),a);return" "===b?"":b}}(),advanced:function(){const a=[g("ae"),"a",g("ai"),"ei",g("ay"),"ei",g("ey"),"ei",g("oe"),"o",g("ue"),"u",g("ie"),"i",g("sz"),"s",g("zs"),"s",g("sh"),"s",g("ck"),"k",g("cc"),"k",g("dt"),"t",g("ph"),"f",g("pf"),"f",g("ou"),"o",g("uo"),"u"];return function(b,c){if(!b)return b;b=this.simple(b);2<b.length&&(b=G(b,a));c||1<b.length&&(b=N(b));return b}}(),extra:function(){const a=
+[g("p"),"b",g("z"),"s",g("[cgq]"),"k",g("n"),"m",g("d"),"t",g("[vw]"),"f",g("[aeiouy]"),""];return function(b){if(!b)return b;b=this.advanced(b,!0);if(1<b.length){b=b.split(" ");for(let c=0;c<b.length;c++){const d=b[c];1<d.length&&(b[c]=d[0]+G(d.substring(1),a))}b=b.join(" ");b=N(b)}return b}}(),balance:function(){const a=[g("[-/]")," ",g("[^a-z0-9 ]"),"",g("\\s+")," "];return function(b){return N(G(b.toLowerCase(),a))}}()},Z=function(){function a(a){this.clear();this.B=!0!==a&&a}a.prototype.clear=
+function(){this.cache=r();this.count=r();this.index=r();this.l=[]};a.prototype.set=function(a,c){if(this.B&&x(this.cache[a])){let b=this.l.length;if(b===this.B){b--;const a=this.l[b];delete this.cache[a];delete this.count[a];delete this.index[a]}this.index[a]=b;this.l[b]=a;this.count[a]=-1;this.cache[a]=c;this.get(a)}else this.cache[a]=c};a.prototype.get=function(a){const b=this.cache[a];if(this.B&&b){var d=++this.count[a];const b=this.index;let c=b[a];if(0<c){const f=this.l;for(var e=c;this.count[f[--c]]<=
+d&&-1!==c;);c++;if(c!==e){for(d=e;d>c;d--)e=f[d-1],f[d]=e,b[e]=d;f[c]=a;b[a]=c}}}return b};return a}();return k}(!1),this);
diff --git a/flexsearch.js b/flexsearch.js
index 11059e7..b3cffb8 100644
--- a/flexsearch.js
+++ b/flexsearch.js
@@ -1,5 +1,5 @@
 /**!
- * @preserve FlexSearch v0.5.2
+ * @preserve FlexSearch v0.5.3
  * Copyright 2019 Nextapps GmbH
  * Author: Thomas Wilkerling
  * Released under the Apache 2.0 Licence
@@ -1381,12 +1381,12 @@
             return result;
         }
 
-        function merge_and_sort(query, result, sort, limit, where, cursor){
+        function merge_and_sort(query, bool, result, sort, limit, where, cursor){
 
             const doc = this._doc;
             const suggest = SUPPORT_SUGGESTIONS && this.suggest;
 
-            result = intersect(result, where ? 0 : limit, cursor, suggest);
+            result = intersect(result, bool, where ? 0 : limit, cursor, suggest);
             result = enrich_documents(result, doc);
 
             if(where){
@@ -1455,9 +1455,6 @@
 
             let _query = query;
             let threshold;
-            //let boost;
-            let where;
-            let sort;
             let cursor;
             let result = [];
 
@@ -1475,17 +1472,6 @@
                     }
                 }
 
-                if(SUPPORT_DOCUMENTS){
-
-                    //boost = query["boost"];
-                    sort = query["sort"];
-
-                    if(SUPPORT_WHERE){
-
-                        where = query["where"];
-                    }
-                }
-
                 //cursor = this.paging && query["cursor"];
                 limit = query["limit"];
                 threshold = query["threshold"];
@@ -1494,6 +1480,10 @@
 
             if(SUPPORT_DOCUMENTS && this.doc){
 
+                //let boost = query["boost"];
+                let where = SUPPORT_WHERE && _query["where"];
+                let bool = _query["bool"];
+                let sort = _query["sort"];
                 const doc_idx = this.doc["index"];
 
                 let queries;
@@ -1515,7 +1505,14 @@
 
                     for(let i = 0; i < _query.length; i++){
 
-                        field[i] = _query[i]["field"];
+                        const current = _query[i];
+
+                        field[i] = current["field"];
+
+                        // TODO: improve array notation (redundancy)
+                        bool = current["bool"];
+                        sort = current["sort"];
+                        where = SUPPORT_WHERE && current["where"];
                     }
                 }
                 else{
@@ -1523,10 +1520,10 @@
                     field = this.doc["keys"];
                 }
 
-                if(sort){
-
-                    _query["sort"] = null;
-                }
+                // if(sort){
+                //
+                //     _query["sort"] = null;
+                // }
 
                 const len = field.length;
 
@@ -1542,7 +1539,7 @@
 
                 if(callback){
 
-                    return callback(merge_and_sort.call(this, query, result, sort, limit, where, cursor));
+                    return callback(merge_and_sort.call(this, query, bool, result, sort, limit, where, cursor));
                 }
                 else if(SUPPORT_ASYNC && this.async){
 
@@ -1552,13 +1549,13 @@
 
                         Promise.all(/** @type {!Iterable<Promise>} */ (result)).then(function(values){
 
-                            resolve(merge_and_sort.call(self, query, values, sort, limit, where, cursor));
+                            resolve(merge_and_sort.call(self, query, bool, values, sort, limit, where, cursor));
                         });
                     });
                 }
                 else{
 
-                    return merge_and_sort.call(this, query, result, sort, limit, where, cursor);
+                    return merge_and_sort.call(this, query, bool, result, sort, limit, where, cursor);
                 }
             }
 
@@ -1588,7 +1585,7 @@
                         "limit": limit,
                         "cursor": cursor,
                         "threshold": threshold,
-                        "where": where,
+                        //"where": where,
                         "content": query
                     });
                 }
@@ -1833,22 +1830,25 @@
                 found = false;
             }
 
-            if(found){
+            if(!SUPPORT_DOCUMENTS || !this.doc){
 
-                // Not handled by intersection:
+                if(found){
 
-                result = intersect(check, limit, cursor, /*SUPPORT_DOCUMENTS && this._doc,*/ SUPPORT_SUGGESTIONS && this.suggest);
+                    // Not handled by intersection:
 
-                // Handled by intersection:
+                    result = intersect(check, false, limit, cursor, /*SUPPORT_DOCUMENTS && this._doc,*/ SUPPORT_SUGGESTIONS && this.suggest);
 
-                //result = intersect_3d(check, limit, this.suggest);
-            }
+                    // Handled by intersection:
 
-            // store result to cache
+                    //result = intersect_3d(check, limit, this.suggest);
+                }
 
-            if(SUPPORT_CACHE && this.cache && (!SUPPORT_DOCUMENTS || !this.doc)){
+                // store result to cache
 
-                this._cache.set(query, result);
+                if(SUPPORT_CACHE && this.cache){
+
+                    this._cache.set(query, result);
+                }
             }
 
             if(PROFILER){
@@ -3047,13 +3047,14 @@
 
         /**
          * @param {!Array<Array<number|string>>} arrays
+         * @param {string|boolean=} bool
          * @param {number=} limit
          * @param {number=} cursor
          * @param {boolean=} suggest
          * @returns {Array}
          */
 
-        function intersect(arrays, limit, cursor, /*docs,*/ suggest) {
+        function intersect(arrays, bool, limit, cursor, /*docs,*/ suggest) {
 
             let result = [];
             let suggestions;
@@ -3061,36 +3062,73 @@
 
             if(length_z > 1){
 
+                bool = (bool === "or");
+                // const bool_or = (bool === "or");
+                // const bool_and = (bool === "and") || !bool;
+                // const bool_not = (bool === "not");
+
                 // pre-sort arrays
 
                 //TODO: test strategy
                 //arrays.sort(sort_by_length_down);
 
+                const check = create_object();
+                let arr /*= arrays[0]*/;
+                let z = -1; // start from 0
+                let length /*= arr.length*/;
+
                 // fill initial map
 
-                const check = create_object();
-                let arr = arrays[0];
-                let length = arr.length;
                 let i = 0;
-
-                while(i < length) {
-
-                    check["@" + arr[i++]] = 1;
-                }
+                let first_result;
 
                 // loop through arrays
 
-                let tmp, count = 0;
-                let z = 0; // start from 1
+                let tmp, init = true, count = 0;
 
                 while(++z < length_z){
 
-                    let found = false;
                     const is_final_loop = (z === (length_z - 1));
 
-                    suggestions = [];
                     arr = arrays[z];
                     length = arr.length;
+
+                    if(!length){
+
+                        if(!bool && !suggest){
+
+                            return result;
+                        }
+
+                        if(is_final_loop && !count){
+
+                            return first_result || result;
+                        }
+
+                        continue;
+                    }
+
+                    if(init){
+
+                        if(is_final_loop){
+
+                            return arr;
+                        }
+
+                        while(i < length) {
+
+                            check["@" + arr[i++]] = 1;
+                        }
+
+                        first_result = arr;
+                        init = false;
+
+                        continue;
+                    }
+
+                    let found = false;
+
+                    suggestions = [];
                     i = 0;
 
                     while(i < length){
@@ -3103,7 +3141,7 @@
 
                             const check_val = check[index];
 
-                            if(check_val === z){
+                            if(bool || (check_val === z) /*|| (bool_not && !check_val)*/){
 
                                 // fill in during last round
 
@@ -3681,8 +3719,6 @@
 
     )), this);
 
-    /* istanbul ignore next */
-
     /** --------------------------------------------------------------------------------------
      * UMD Wrapper for Browser and Node.js
      * @param {!string} name
@@ -3694,6 +3730,8 @@
 
     function provide(name, factory, root){
 
+        /* istanbul ignore next */
+
         let prop;
 
         // AMD (RequireJS)
diff --git a/package.json b/package.json
index 35b93ba..b032ed7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "flexsearch",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "description": "Next-Generation full text search library with zero dependencies.",
   "homepage": "https://github.com/nextapps-de/flexsearch/",
   "author": "Thomas Wilkerling",
diff --git a/test/test.es6.js b/test/test.es6.js
index fb73c3d..ccb0fa9 100644
--- a/test/test.es6.js
+++ b/test/test.es6.js
@@ -80,25 +80,25 @@ describe("Index Multi-Field Documents (ES6)", function(){
         expect(await index.search({field: "data:body", query: "title"})).to.have.lengthOf(0);
         expect(await index.search({field: "data:title", query: "body"})).to.have.lengthOf(0);
 
-        //TODO: provide logical operator "OR"
-        // expect(await index.search({field: ["data:title", "data:body"], query: "body"})).to.have.members(data);
-        // expect(await index.search({field: ["data:body", "data:title"], query: "title"})).to.have.members(data);
+        expect(await index.search({field: ["data:title", "data:body"], query: "body", bool: "or"})).to.have.members(data);
+        expect(await index.search({field: ["data:body", "data:title"], query: "title", bool: "or"})).to.have.members(data);
+
         expect(await index.search({field: ["data:body"], query: "body"})).to.have.members(data);
         expect(await index.search({field: "data:title", query: "title"})).to.have.members(data);
 
-        //TODO: provide logical operator "OR"
-        // expect(await index.search({query: "body"})).to.have.members(data);
-        // expect(await index.search("title")).to.have.members(data);
+        expect(await index.search({query: "body", bool: "or"})).to.have.members(data);
+        expect(await index.search("title", {bool: "or"})).to.have.members(data);
+
         expect(await index.search({field: ["data:body"], query: "body"})).to.have.members(data);
         expect(await index.search({field: "data:title", query: "title"})).to.have.members(data);
 
         await index.update(update);
 
-        //TODO: provide logical operator "OR"
-        // expect(await index.search("foo")).not.to.have.members(data);
-        // expect(await index.search("bar")).not.to.have.members(data);
-        // expect(await index.search("foo")).to.have.members(update);
-        // expect(await index.search("bar")).to.have.members(update);
+        expect(await index.search("foo", {bool: "or"})).not.to.have.members(data);
+        expect(await index.search("bar", {bool: "or"})).not.to.have.members(data);
+        expect(await index.search("foo", {bool: "or"})).to.have.members(update);
+        expect(await index.search("bar", {bool: "or"})).to.have.members(update);
+
         expect(await index.search("foo", {field: "data:title"})).not.to.have.members(data);
         expect(await index.search("bar", {field: "data:body"})).not.to.have.members(data);
         expect(await index.search("foo", {field: "data:title"})).to.have.members(update);
@@ -137,25 +137,25 @@ describe("Index Multi-Field Documents (ES6)", function(){
         expect(await index.search({field: "data:body", query: "title"})).to.have.lengthOf(0);
         expect(await index.search({field: "data:title", query: "body"})).to.have.lengthOf(0);
 
-        //TODO: provide logical operator "OR"
-        // expect(await index.search({field: ["data:title", "data:body"], query: "body"})).to.have.members(data);
-        // expect(await index.search({field: ["data:body", "data:title"], query: "title"})).to.have.members(data);
+        expect(await index.search({field: ["data:title", "data:body"], query: "body", bool: "or"})).to.have.members(data);
+        expect(await index.search({field: ["data:body", "data:title"], query: "title", bool: "or"})).to.have.members(data);
+
         expect(await index.search({field: ["data:body"], query: "body"})).to.have.members(data);
         expect(await index.search({field: "data:title", query: "title"})).to.have.members(data);
 
-        //TODO: provide logical operator "OR"
-        // expect(await index.search({query: "body"})).to.have.members(data);
-        // expect(await index.search("title")).to.have.members(data);
+        expect(await index.search({query: "body", bool: "or"})).to.have.members(data);
+        expect(await index.search("title", {bool: "or"})).to.have.members(data);
+
         expect(await index.search({query: "body", field: "data:body"})).to.have.members(data);
         expect(await index.search("title", {field: "data:title"})).to.have.members(data);
 
         await index.update(update);
 
-        //TODO: provide logical operator "OR"
-        // expect(await index.search("foo")).not.to.have.members(data);
-        // expect(await index.search("bar")).not.to.have.members(data);
-        // expect(await index.search("foo")).to.have.members(update);
-        // expect(await index.search("bar")).to.have.members(update);
+        expect(await index.search("foo", {bool: "or"})).not.to.have.members(data);
+        expect(await index.search("bar", {bool: "or"})).not.to.have.members(data);
+        expect(await index.search("foo", {bool: "or"})).to.have.members(update);
+        expect(await index.search("bar", {bool: "or"})).to.have.members(update);
+
         expect(await index.search("foo", {field: "data:title"})).not.to.have.members(data);
         expect(await index.search("bar", {field: "data:body"})).not.to.have.members(data);
         expect(await index.search("foo", {field: "data:title"})).to.have.members(update);
diff --git a/test/test.js b/test/test.js
index 3c3026a..2b4d31b 100644
--- a/test/test.js
+++ b/test/test.js
@@ -132,9 +132,12 @@ describe("Initialize", function(){
             cache: true
         });
 
-        expect(flexsearch_default).to.be.an.instanceOf(FlexSearch);
-        expect(flexsearch_sync).to.be.an.instanceOf(FlexSearch);
-        expect(flexsearch_async).to.be.an.instanceOf(FlexSearch);
+        it("Should have correct constructors", function(){
+
+            expect(flexsearch_default).to.be.an.instanceOf(FlexSearch);
+            expect(flexsearch_sync).to.be.an.instanceOf(FlexSearch);
+            expect(flexsearch_async).to.be.an.instanceOf(FlexSearch);
+        });
 
         it("Should have correct uuids", function(){
 
@@ -156,6 +159,16 @@ describe("Initialize", function(){
         expect(flexsearch_default).to.respondTo("remove");
         expect(flexsearch_default).to.respondTo("clear");
         expect(flexsearch_default).to.respondTo("init");
+        expect(flexsearch_default).to.respondTo("destroy");
+
+        expect(flexsearch_default).to.hasOwnProperty("length");
+        expect(flexsearch_default).to.hasOwnProperty("index");
+
+        if(env !== "light"){
+
+            expect(flexsearch_default).to.respondTo("where");
+            expect(flexsearch_default).to.respondTo("find");
+        }
 
         if(env !== "light" && env !== "min"){
 
@@ -1327,18 +1340,22 @@ if(env !== "light") describe("Index Multi-Field Documents", function(){
         expect(index.search({field: "data:body", query: "title"})).to.have.lengthOf(0);
         expect(index.search({field: "data:title", query: "body"})).to.have.lengthOf(0);
 
-        //TODO: provide logical operator "OR"
-        //expect(index.search({field: ["data:title", "data:body"], query: "body"})).to.have.members(data);
-        //expect(index.search({field: ["data:body", "data:title"], query: "title"})).to.have.members(data);
         expect(index.search({field: "data:body", query: "body"})).to.have.members(data);
         expect(index.search({field: ["data:title"], query: "title"})).to.have.members(data);
 
-        //TODO: provide logical operator "OR"
-        //expect(index.search({query: "body"})).to.have.members(data);
-        //expect(index.search("title")).to.have.members(data);
+        expect(index.search({field: ["data:title", "data:body"], query: "body"})).to.have.lengthOf(0);
+        expect(index.search({field: ["data:body", "data:title"], query: "title"})).to.have.lengthOf(0);
+        expect(index.search({field: ["data:title", "data:body"], query: "body", bool: "and"})).to.have.lengthOf(0);
+        expect(index.search({field: ["data:body", "data:title"], query: "title", bool: "and"})).to.have.lengthOf(0);
+        expect(index.search({field: ["data:title", "data:body"], query: "body", bool: "or"})).to.have.members(data);
+        expect(index.search({field: ["data:body", "data:title"], query: "title", bool: "or"})).to.have.members(data);
+
         expect(index.search("body", {field: "data:body"})).to.have.members(data);
         expect(index.search("title", {field: ["data:title"]})).to.have.members(data);
 
+        expect(index.search({query: "body", bool: "or"})).to.have.members(data);
+        //expect(index.search("title", {bool: "or"})).to.have.members(data);
+
         expect(index.search({
 
             field: "data:title",
@@ -1347,51 +1364,47 @@ if(env !== "light") describe("Index Multi-Field Documents", function(){
 
         })).to.have.members(data);
 
-        //TODO: provide logical operator "OR"
-        // expect(index.search([{
-        //
-        //     field: "data:title",
-        //     query: "body",
-        //     boost: 2
-        // },{
-        //     field: "data:body",
-        //     query: "body",
-        //     boost: 2
-        //
-        // }])).to.have.members(data);
+        expect(index.search([{
+
+            field: "data:title",
+            query: "body",
+            bool: "or"
+        },{
+            field: "data:body",
+            query: "body",
+            bool: "or"
+
+        }])).to.have.members(data);
 
         expect(index.search("title", {
 
-            field: "data:title",
-            boost: 2
+            field: "data:title"
 
         })).to.have.members(data);
 
         expect(index.search("title", {
 
-            field: "data:body",
-            boost: 2
+            field: "data:body"
 
         })).to.have.lengthOf(0);
 
-        //TODO: provide logical operator "OR"
-        // expect(index.search("body", [{
-        //
-        //     field: "data:title",
-        //     boost: 2
-        // },{
-        //     field: "data:body",
-        //     boost: 2
-        //
-        // }])).to.have.members(data);
+        expect(index.search("body", [{
+
+            field: "data:title",
+            bool: "or"
+        },{
+            field: "data:body",
+            bool: "or"
+
+        }])).to.have.members(data);
 
         index.update(update);
 
-        //TODO: provide logical operator "OR"
-        // expect(index.search("foo")).not.to.have.members(data);
-        // expect(index.search("bar")).not.to.have.members(data);
-        // expect(index.search("foo")).to.have.members(update);
-        // expect(index.search("bar")).to.have.members(update);
+        expect(index.search("foo", {bool: "or"})).not.to.have.members(data);
+        expect(index.search("bar", {bool: "or"})).not.to.have.members(data);
+        expect(index.search("foo", {bool: "or"})).to.have.members(update);
+        expect(index.search("bar", {bool: "or"})).to.have.members(update);
+
         expect(index.search("foo", {field: "data:title"})).not.to.have.members(data);
         expect(index.search("bar", {field: "data:body"})).not.to.have.members(data);
         expect(index.search("foo", {field: "data:title"})).to.have.members(update);
@@ -1440,15 +1453,15 @@ if(env !== "light") describe("Index Multi-Field Documents", function(){
         expect(index.search({field: "data:body", query: "title"})).to.have.lengthOf(0);
         expect(index.search({field: "data:title", query: "body"})).to.have.lengthOf(0);
 
-        //TODO: provide logical operator "OR"
-        //expect(index.search({field: ["data:title", "data:body"], query: "body"})).to.have.members(data);
-        //expect(index.search({field: ["data:body", "data:title"], query: "tle"})).to.have.members(data);
-        expect(index.search({field: ["data:body"], query: "body"})).to.have.members(data);
-        expect(index.search({field: "data:title", query: "tle"})).to.have.members(data);
+        expect(index.search({field: ["data:title", "data:body"], query: "body", bool: "or"})).to.have.members(data);
+        expect(index.search({field: ["data:body", "data:title"], query: "tle", bool: "or"})).to.have.members(data);
+
+        expect(index.search({field: ["data:body"], query: "body", bool: "or"})).to.have.members(data);
+        expect(index.search({field: "data:title", query: "tle", bool: "or"})).to.have.members(data);
+
+        expect(index.search({query: "body", bool: "or"})).to.have.members(data);
+        expect(index.search("tle", {bool: "or"})).to.have.members(data);
 
-        //TODO: provide logical operator "OR"
-        //expect(index.search({query: "body"})).to.have.members(data);
-        //expect(index.search("tle")).to.have.members(data);
         expect(index.search({query: "body", field: "data:body"})).to.have.members(data);
         expect(index.search("tle", {field: "data:title"})).to.have.members(data);
 
@@ -1459,16 +1472,17 @@ if(env !== "light") describe("Index Multi-Field Documents", function(){
 
         })).to.have.members(data);
 
-        //TODO: provide logical operator "OR"
-        // expect(index.search([{
-        //
-        //     field: "data:title",
-        //     query: "body"
-        // },{
-        //     field: "data:body",
-        //     query: "body"
-        //
-        // }])).to.have.members(data);
+        expect(index.search([{
+
+            field: "data:title",
+            query: "body",
+            bool: "or"
+        },{
+            field: "data:body",
+            query: "body",
+            bool: "or"
+
+        }])).to.have.members(data);
 
         expect(index.search("tle", {
 
@@ -1482,22 +1496,23 @@ if(env !== "light") describe("Index Multi-Field Documents", function(){
 
         })).to.have.lengthOf(0);
 
-        //TODO: provide logical operator "OR"
-        // expect(index.search("body", [{
-        //
-        //     field: "data:title"
-        // },{
-        //     field: "data:body"
-        //
-        // }])).to.have.members(data);
+        expect(index.search("body", [{
+
+            field: "data:title",
+            bool: "or"
+        },{
+            field: "data:body",
+            bool: "or"
+
+        }])).to.have.members(data);
 
         index.update(update);
 
-        //TODO: provide logical operator "OR"
-        // expect(index.search("foo")).not.to.have.members(data);
-        // expect(index.search("bar")).not.to.have.members(data);
-        // expect(index.search("foo")).to.have.members(update);
-        // expect(index.search("bar")).to.have.members(update);
+        expect(index.search("foo", {bool: "or"})).not.to.have.members(data);
+        expect(index.search("bar", {bool: "or"})).not.to.have.members(data);
+        expect(index.search("foo", {bool: "or"})).to.have.members(update);
+        expect(index.search("bar", {bool: "or"})).to.have.members(update);
+
         expect(index.search("foo", {field: "data:title"})).not.to.have.members(data);
         expect(index.search("bar", {field: "data:body"})).not.to.have.members(data);
         expect(index.search("foo", {field: "data:title"})).to.have.members(update);
@@ -1803,6 +1818,23 @@ if(env !== "light") describe("Export / Import", function(){
     });
 });
 
+// ------------------------------------------------------------------------
+// Presets
+// ------------------------------------------------------------------------
+
+describe("Presets", function(){
+
+    it("Should have been properly initialized", function(){
+
+        expect(FlexSearch.create("memory").length).to.equal(0);
+        expect(FlexSearch.create("speed").length).to.equal(0);
+        expect(FlexSearch.create("match").length).to.equal(0);
+        expect(FlexSearch.create("score").length).to.equal(0);
+        expect(FlexSearch.create("balance").length).to.equal(0);
+        expect(FlexSearch.create("fast").length).to.equal(0);
+    });
+});
+
 // ------------------------------------------------------------------------
 // Feature Tests
 // ------------------------------------------------------------------------
@@ -1912,6 +1944,28 @@ if(env !== "light" && env !== "min"){
     });
 }
 
+// ------------------------------------------------------------------------
+// Destroy
+// ------------------------------------------------------------------------
+
+describe("Destroy", function(){
+
+    it("Should have been destroyed properly", function(){
+
+        var index = FlexSearch.create()
+                              .add(0, "foo")
+                              .add(1, "bar");
+
+        expect(index.search("foo")).to.include(0);
+        expect(index.search("bar")).to.include(1);
+
+        index.destroy();
+
+        expect(index.search("foo")).to.have.lengthOf(0);
+        expect(index.search("bar")).to.have.lengthOf(0);
+    });
+});
+
 // ------------------------------------------------------------------------
 // Chaining
 // ------------------------------------------------------------------------