Remove singleton code sample, update gemfile

Gemfile

@@ -1,2 +1,3 @@
 source 'https://rubygems.org'
 gem 'github-pages'
+gem 'rouge'

Gemfile.lock

@@ -2,125 +2,146 @@ GEM
   remote: https://rubygems.org/
   specs:
     RedCloth (4.2.9)
-    activesupport (4.2.5.1)
+    activesupport (5.0.0.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.3.8)
+    addressable (2.4.0)
+    blankslate (2.1.2.4)
+    classifier-reborn (2.0.4)
+      fast-stemmer (~> 1.0)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
     coffee-script-source (1.10.0)
     colorator (0.1)
-    ethon (0.8.1)
+    concurrent-ruby (1.0.2)
+    ethon (0.9.1)
       ffi (>= 1.3.0)
-    execjs (2.6.0)
+    execjs (2.7.0)
-    faraday (0.9.2)
+    faraday (0.10.0)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.10)
+    fast-stemmer (1.0.2)
+    ffi (1.9.14)
+    ffi (1.9.14-x64-mingw32)
     gemoji (2.1.0)
-    github-pages (48)
+    github-pages (39)
       RedCloth (= 4.2.9)
-      github-pages-health-check (= 0.6.1)
+      github-pages-health-check (~> 0.2)
-      jekyll (= 3.0.3)
+      jekyll (= 2.4.0)
       jekyll-coffeescript (= 1.0.1)
       jekyll-feed (= 0.3.1)
-      jekyll-gist (= 1.4.0)
+      jekyll-mentions (= 0.2.1)
-      jekyll-mentions (= 1.0.0)
+      jekyll-redirect-from (= 0.8.0)
-      jekyll-paginate (= 1.1.0)
-      jekyll-redirect-from (= 0.9.1)
       jekyll-sass-converter (= 1.3.0)
-      jekyll-seo-tag (= 1.0.0)
+      jekyll-sitemap (= 0.8.1)
-      jekyll-sitemap (= 0.10.0)
+      jemoji (= 0.5.0)
-      jekyll-textile-converter (= 0.1.0)
+      kramdown (= 1.5.0)
-      jemoji (= 0.5.1)
+      liquid (= 2.6.2)
-      kramdown (= 1.9.0)
+      maruku (= 0.7.0)
-      liquid (= 3.0.6)
       mercenary (~> 0.3)
-      rdiscount (= 2.1.8)
+      pygments.rb (= 0.6.3)
-      redcarpet (= 3.3.3)
+      rdiscount (= 2.1.7)
-      rouge (= 1.10.1)
+      redcarpet (= 3.3.2)
       terminal-table (~> 1.4)
-    github-pages-health-check (0.6.1)
+    github-pages-health-check (0.3.2)
-      addressable (~> 2.3)
+      net-dns (~> 0.6)
-      net-dns (~> 0.8)
       public_suffix (~> 1.4)
       typhoeus (~> 0.7)
-    html-pipeline (2.3.0)
+    html-pipeline (1.9.0)
-      activesupport (>= 2, < 5)
+      activesupport (>= 2)
-      nokogiri (>= 1.4)
+      nokogiri (~> 1.4)
     i18n (0.7.0)
-    jekyll (3.0.3)
+    jekyll (2.4.0)
+      classifier-reborn (~> 2.0)
       colorator (~> 0.1)
+      jekyll-coffeescript (~> 1.0)
+      jekyll-gist (~> 1.0)
+      jekyll-paginate (~> 1.0)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 1.1)
       kramdown (~> 1.3)
-      liquid (~> 3.0)
+      liquid (~> 2.6.1)
       mercenary (~> 0.3.3)
-      rouge (~> 1.7)
+      pygments.rb (~> 0.6.0)
+      redcarpet (~> 3.1)
       safe_yaml (~> 1.0)
+      toml (~> 0.1.0)
     jekyll-coffeescript (1.0.1)
       coffee-script (~> 2.2)
     jekyll-feed (0.3.1)
     jekyll-gist (1.4.0)
       octokit (~> 4.2)
-    jekyll-mentions (1.0.0)
+    jekyll-mentions (0.2.1)
-      html-pipeline (~> 2.2)
+      html-pipeline (~> 1.9.0)
-      jekyll (~> 3.0)
+      jekyll (~> 2.0)
     jekyll-paginate (1.1.0)
-    jekyll-redirect-from (0.9.1)
+    jekyll-redirect-from (0.8.0)
       jekyll (>= 2.0)
     jekyll-sass-converter (1.3.0)
       sass (~> 3.2)
-    jekyll-seo-tag (1.0.0)
+    jekyll-sitemap (0.8.1)
-      jekyll (>= 2.0)
+    jekyll-watch (1.5.0)
-    jekyll-sitemap (0.10.0)
+      listen (~> 3.0, < 3.1)
-    jekyll-textile-converter (0.1.0)
+    jemoji (0.5.0)
-      RedCloth (~> 4.0)
-    jekyll-watch (1.3.1)
-      listen (~> 3.0)
-    jemoji (0.5.1)
       gemoji (~> 2.0)
-      html-pipeline (~> 2.2)
+      html-pipeline (~> 1.9)
       jekyll (>= 2.0)
-    json (1.8.3)
+    kramdown (1.5.0)
-    kramdown (1.9.0)
+    liquid (2.6.2)
-    liquid (3.0.6)
+    listen (3.0.8)
-    listen (3.0.6)
+      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-fsevent (>= 0.9.3)
+      rb-inotify (~> 0.9, >= 0.9.7)
-      rb-inotify (>= 0.9.7)
+    maruku (0.7.0)
-    mercenary (0.3.5)
+    mercenary (0.3.6)
-    mini_portile2 (2.0.0)
+    mini_portile2 (2.1.0)
-    minitest (5.8.4)
+    minitest (5.9.1)
     multipart-post (2.0.0)
     net-dns (0.8.0)
-    nokogiri (1.6.7.2)
+    nokogiri (1.6.8.1)
-      mini_portile2 (~> 2.0.0.rc2)
+      mini_portile2 (~> 2.1.0)
-    octokit (4.2.0)
+    nokogiri (1.6.8.1-x64-mingw32)
-      sawyer (~> 0.6.0, >= 0.5.3)
+      mini_portile2 (~> 2.1.0)
+    octokit (4.6.1)
+      sawyer (~> 0.8.0, >= 0.5.3)
+    parslet (1.5.0)
+      blankslate (~> 2.0)
+    posix-spawn (0.3.12)
     public_suffix (1.5.3)
-    rb-fsevent (0.9.7)
+    pygments.rb (0.6.3)
+      posix-spawn (~> 0.3.6)
+      yajl-ruby (~> 1.2.0)
+    rb-fsevent (0.9.8)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
-    rdiscount (2.1.8)
+    rdiscount (2.1.7)
-    redcarpet (3.3.3)
+    redcarpet (3.3.2)
-    rouge (1.10.1)
+    rouge (2.0.7)
     safe_yaml (1.0.4)
-    sass (3.4.21)
+    sass (3.4.22)
-    sawyer (0.6.0)
+    sawyer (0.8.1)
-      addressable (~> 2.3.5)
+      addressable (>= 2.3.5, < 2.6)
-      faraday (~> 0.8, < 0.10)
+      faraday (~> 0.8, < 1.0)
-    terminal-table (1.5.2)
+    terminal-table (1.7.3)
+      unicode-display_width (~> 1.1.1)
     thread_safe (0.3.5)
+    toml (0.1.2)
+      parslet (~> 1.5.0)
     typhoeus (0.8.0)
       ethon (>= 0.8.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
+    unicode-display_width (1.1.1)
+    yajl-ruby (1.2.1)
 
 PLATFORMS
   ruby
+  x64-mingw32
 
 DEPENDENCIES
   github-pages
+  rouge
+
+BUNDLED WITH
+   1.13.6

pages/Design-Patterns.md

@@ -68,70 +68,7 @@ yourself a lot of trouble down the road by using factories.
 When designing web applications, it often makes sense conceptually and architecturally to allow access to one and only
 one instance of a particular class. The singleton pattern enables us to do this.
 
-{% highlight php %}
+**TODO: NEED NEW SINGLETON CODE EXAMPLE**
-<?php
-class Singleton
-{
-    /**
-     * @var Singleton The reference to *Singleton* instance of this class
-     */
-    private static $instance;
-    
-    /**
-     * Returns the *Singleton* instance of this class.
-     *
-     * @return Singleton The *Singleton* instance.
-     */
-    public static function getInstance()
-    {
-        if (null === static::$instance) {
-            static::$instance = new static();
-        }
-        
-        return static::$instance;
-    }
-
-    /**
-     * Protected constructor to prevent creating a new instance of the
-     * *Singleton* via the `new` operator from outside of this class.
-     */
-    protected function __construct()
-    {
-    }
-
-    /**
-     * Private clone method to prevent cloning of the instance of the
-     * *Singleton* instance.
-     *
-     * @return void
-     */
-    private function __clone()
-    {
-    }
-
-    /**
-     * Private unserialize method to prevent unserializing of the *Singleton*
-     * instance.
-     *
-     * @return void
-     */
-    private function __wakeup()
-    {
-    }
-}
-
-class SingletonChild extends Singleton
-{
-}
-
-$obj = Singleton::getInstance();
-var_dump($obj === Singleton::getInstance());             // bool(true)
-
-$anotherObj = SingletonChild::getInstance();
-var_dump($anotherObj === Singleton::getInstance());      // bool(false)
-
-var_dump($anotherObj === SingletonChild::getInstance()); // bool(true)
-{% endhighlight %}
 
 The code above implements the singleton pattern using a [*static* variable](http://php.net/language.variables.scope#language.variables.scope.static) and the static creation method `getInstance()`.
 Note the following: