gistfile1.as

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
	creationComplete="handleCreationComplete(event)"
	>
	<mx:Script>
		<![CDATA[
			import mx.collections.ArrayCollection;
			
			[Bindable]
			public var arrayCollection:ArrayCollection;
			
			[Bindable]
			public var primitiveArray:Array;
			
			private function handleCreationComplete(event:Event):void {
				arrayCollection = new ArrayCollection();
				primitiveArray = [];
				
				for (var i:uint = 0; i < 10; i++) {
					arrayCollection.addItem("testing " + i.toString());
					primitiveArray.push("testing " + i.toString());
					if (i == 4 || i == 8) {
						arrayCollection.addItem("something");
						primitiveArray.push("something");
					}
				}
			}
			
		]]>
	</mx:Script>
	<mx:HBox>
		<mx:List width="100" height="300" dataProvider="{primitiveArray}" />
		<mx:List width="100" height="300" dataProvider="{arrayCollection}" />
	</mx:HBox>
</mx:Application>