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Filter TextInput

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">     <mx:Canvas>         <mx:Script>                                  [Bindable]                 private var probableMatches:Array;                      private var allWords:Array = ["apple", "boy", "cat"];                 private var regexp:RegExp;                      private function checkInput():void                 {                     var temp:Array = allWords.filter(filter);                     if(temp){                         input.text = temp[0];                     }                 }                      private function filter(element:*, index:int, arr:Array):Boolean                 {                     regexp = new RegExp(input.text);                     return (regexp.test(element as String));                 }                         </mx:Script>         <mx:TextInput id="input" change="checkInput()"/>     </mx:Canvas> </mx:Application>