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arrayCollection Grouping for comboBox

Posted on 2011-03-14
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Last Modified: 2012-08-13
How to group items in an array collection so my combobox does not repeat the duplicat items. I have don this with a datagrid but can not seem to get to work with a combobox.
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Question by:kpjj31
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dgofman earned 2000 total points
ID: 35134376
You may not need to use a groupCollection,
You can use an Array filter.

<?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" 
			   xmlns:mx="library://ns.adobe.com/flex/mx" initialize="init()">
	<fx:Script>
		<![CDATA[
			import mx.collections.ArrayCollection;

			private var _original:Array = new Array(
					{label:"One", data:1},
					{label:"Two", data:2},
					{label:"Three", data:3},
					{label:"One", data:1}
			);
			
			private function init():void{
				var keys:Object = {};
				var filteredArr:Array = _original.filter(function(item:Object, idx:uint, arr:Array):Boolean {
					if (keys.hasOwnProperty(item.data)) {
						return false;
					} else {
						keys[item.data] = item;
						return true;
					}
				});
				cmb_uniq.dataProvider = new ArrayCollection(filteredArr);
			}
		]]>
	</fx:Script>
	<s:ComboBox id="cmb_uniq"/>
</s:Application>

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