flex 33 XMLList XMLListCollection ArrayCollection

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
 <mx:Panel width="350" height="220" layout="absolute" horizontalCenter="0" verticalCenter="0">
  <mx:DataGrid horizontalCenter="0" verticalCenter="0" dataProvider="{ac}">
   <mx:columns>
    <mx:DataGridColumn headerText="Name" dataField="ename"/>
    <mx:DataGridColumn headerText="Phone" dataField="phone"/>
    <mx:DataGridColumn headerText="Email" dataField="email"/>
   </mx:columns>
  </mx:DataGrid>
 </mx:Panel>
 <mx:Script>
  <![CDATA[
   import mx.collections.ArrayCollection;
   import mx.collections.XMLListCollection;
   public var info:XML =
   <employees>
    <emp>
     <ename>scott</ename>
     <phone>22-333-3453</phone>
     <email>scott@flex.com</email>
    </emp>
    <emp>
     <ename>allen</ename>
     <phone>24-233-3456</phone>
     <email>allen@flex.com</email>
    </emp>
    <emp>
     <ename>smith</ename>
     <phone>23-323-5675</phone>
     <email>smith@flex.com</email>
    </emp>
    <emp>
     <ename>ford</ename>
     <phone>25-323-3366</phone>
     <email>ford@flex.com</email>
    </emp>
    <emp>
     <ename>john</ename>
     <phone>27-333-5686</phone>
     <email>john@flex.com</email>
    </emp>
    <emp>
     <ename>ward</ename>
     <phone>27-243-2356</phone>
     <email>ward@flex.com</email>
    </emp>
   </employees>
   public var list:XMLList = info.emp;
    public var xc:XMLListCollection = new XMLListCollection(list);
   public var ac:ArrayCollection = new ArrayCollection(xc.toArray());
  ]]>
 </mx:Script>
</mx:Application>