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Format List with labelFunction property

<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" >     <mx:Script>                               private function formatData(item:Object):String              {                 return dateF.format(item.data);             }                          private function changeData(obj:Object):void             {                 dateTxt.text =  dateF.format(obj.data);             }            </mx:Script>     <mx:ArrayCollection id="myAC">                      <mx:Object label="{new Date(2010,1,1)}" data="{new Date(2010,1,1)}"/>             <mx:Object label="{new Date(2010,1,2)}" data="{new Date(2010,1,2)}"/>             <mx:Object label="{new Date(2010,1,3)}" data="{new Date(2010,1,3)}"/>              </mx:ArrayCollection>                 <mx:DateFormatter id="dateF" formatString="EEE, DD/MMM/YYYY" />     <mx:TextInput id="dateTxt" editable="false"  />     <mx:ComboBox id="myCombo" dataProvider="{myAC}"         labelFunction="formatData"         change="changeData(myCombo.selectedItem)" />      </mx:Application>