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		<title>Flash / Flex / ActionScript/Class/Singleton - История изменений</title>
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		<updated>2026-04-04T15:51:10Z</updated>
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		<id>http://wbex.ru/index.php?title=Flash_/_Flex_/_ActionScript/Class/Singleton&amp;diff=4408&amp;oldid=prev</id>
		<title> в 09:19, 26 мая 2010</title>
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				<updated>2010-05-26T09:19:12Z</updated>
		
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	<entry>
		<id>http://wbex.ru/index.php?title=Flash_/_Flex_/_ActionScript/Class/Singleton&amp;diff=4409&amp;oldid=prev</id>
		<title>Admin: 1 версия</title>
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				<updated>2010-05-26T08:14:45Z</updated>
		
		<summary type="html">&lt;p&gt;1 версия&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Новая страница&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==Singleton Pattern==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
  &amp;lt;!-- start source code --&amp;gt;&lt;br /&gt;
   &lt;br /&gt;
    &amp;lt;source lang=&amp;quot;java&amp;quot;&amp;gt;&lt;br /&gt;
 &lt;br /&gt;
package {&lt;br /&gt;
  public class Singleton {&lt;br /&gt;
  &lt;br /&gt;
    static var instanceCount:uint = 0;&lt;br /&gt;
    public function Singleton() {&lt;br /&gt;
      instanceCount++;&lt;br /&gt;
      if(instanceCount == 1) {&lt;br /&gt;
        trace(&amp;quot;First Singleton class instance&amp;quot;);&lt;br /&gt;
      } else {&lt;br /&gt;
        trace(&amp;quot;Singleton class allows only one instance&amp;quot;);&lt;br /&gt;
      }&lt;br /&gt;
    }&lt;br /&gt;
  }&lt;br /&gt;
     &lt;br /&gt;
}&lt;br /&gt;
        &amp;lt;/source&amp;gt;&lt;br /&gt;
    &lt;br /&gt;
   &lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==Singleton pattern with getInstance==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
  &amp;lt;!-- start source code --&amp;gt;&lt;br /&gt;
   &lt;br /&gt;
    &amp;lt;source lang=&amp;quot;java&amp;quot;&amp;gt;&lt;br /&gt;
 &lt;br /&gt;
package {&lt;br /&gt;
  public class Singleton {&lt;br /&gt;
    private static var instance:Singleton;&lt;br /&gt;
    private static var allowInstance:Boolean;&lt;br /&gt;
    public function Singleton() {&lt;br /&gt;
      if(!allowInstance) { &lt;br /&gt;
        throw new Error(&amp;quot;Error: use Singleton.getInstance() instead of new keyword&amp;quot;);&lt;br /&gt;
      }&lt;br /&gt;
    }&lt;br /&gt;
    public static function getInstance():Singleton {&lt;br /&gt;
       if(instance == null) {&lt;br /&gt;
         allowInstance = true;&lt;br /&gt;
         instance = new Singleton();&lt;br /&gt;
         trace(&amp;quot;Singleton instance created&amp;quot;);&lt;br /&gt;
         allowInstance = false;&lt;br /&gt;
       } else { &lt;br /&gt;
         trace(&amp;quot;Singleton instance already exists&amp;quot;);&lt;br /&gt;
       }&lt;br /&gt;
       return instance;&lt;br /&gt;
    }&lt;br /&gt;
    public function doSomething():void {&lt;br /&gt;
      trace(&amp;quot;doing something&amp;quot;);&lt;br /&gt;
    }&lt;br /&gt;
  }&lt;br /&gt;
}&lt;br /&gt;
        &amp;lt;/source&amp;gt;&lt;/div&gt;</summary>
		<author><name>Admin</name></author>	</entry>

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