ActionScript 3 :: Flex ArrayCollection GetItemIndex Always Return -1

Dec 21, 2011

My code is:
var dataList:ArrayCollection = new ArrayCollection([{name:"alauddn"}, {name:"ansari"}]);
private function getItemInd(event:MouseEvent):void{
var item:Object = new Object();
item.name = "ansari";
var ias:int = dataList.getItemIndex(item);
Alert.show(ias.toString() + ": " + item.name);
}
But it returns "-1:

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