Flex4 spark list which shows the number

Displaying the row number or index in a spark List
http://flexponential.com/2010/02/08/displaying-the-row-number-or-index-in-a-spark-list/

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s="library://ns.adobe.com/flex/spark" width="200" height="215"  viewSourceURL="srcview/index.html">
    
    <s:List height="200" width="200" top="10">
        <s:layout>
            <s:VerticalLayout gap="1" horizontalAlign="justify" />
        </s:layout>
        <s:dataProvider>
            <s:ArrayList>
                <fx:String>Roberto Luongo</fx:String>
                <fx:String>Scott Niedermayer</fx:String>
                <fx:String>Jarome Iginla</fx:String>
                <fx:String>Dan Boyle</fx:String>
                <fx:String>Rick Nash</fx:String>
                <fx:String>Ryan Getzlaf</fx:String>
                <fx:String>Martin Brodeur</fx:String>
                <fx:String>Chris Pronger</fx:String>
                <fx:String>Shane Doan</fx:String>
                <fx:String>Shea Weber</fx:String>
                <fx:String>Patrick Marleau</fx:String>
                <fx:String>Jay Bouwmeester</fx:String>
                <fx:String>Duncan Keith</fx:String>
                <fx:String>Dany Heatley</fx:String>
                <fx:String>Robyn Regehr</fx:String>
                <fx:String>Mike Richards</fx:String>
                <fx:String>Brenden Morrow</fx:String>
                <fx:String>Martin St. Louis</fx:String>
                <fx:String>Jeff Carter</fx:String>
                <fx:String>Eric Staal</fx:String>
                <fx:String>Sidney Crosby</fx:String>
            </s:ArrayList>
        </s:dataProvider>
        <s:itemRenderer>
            <fx:Component>
                <s:ItemRenderer>
                    <fx:Script>
                        <![CDATA[
                            import spark.components.List;
                            override public function set data(value:Object):void {
                                super.data = value;
                                
                                if (value == null)
                                    return;
                                
                                txtPlayer.text = String(data);
                                txtRowNumber.text = String(itemIndex);
                                
                                // NOTE: In older builds ItemRenderer.itemIndex didn't exist yet.  If you are on an older
                                // build you can get this information using the following line instead:
                                //
                                //txtRowNumber.text = String((owner as List).dataProvider.getItemIndex(data));
                            }
                        ]]>
                    </fx:Script>
                    <s:Group>
                        <s:Rect width="25" height="20">
                            <s:fill>
                                <s:SolidColor color="0xFF0000" />
                            </s:fill>
                        </s:Rect>
                        <s:Label color="white" fontWeight="bold" horizontalCenter="0" verticalCenter="0" />
                    </s:Group>
                    
                    <s:Label x="30" verticalCenter="0" />
                </s:ItemRenderer>
            </fx:Component>
        </s:itemRenderer>
    </s:List>
    
</s:Application>

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