Question

flex ArrayCollection怎样去掉重复项

Answer 1

<?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"
creationComplete="application1_creationCompleteHandler(event)"
minWidth="955" minHeight="600">
<s:layout>
<s:BasicLayout/>
</s:layout>

<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.events.FlexEvent;

protected function application1_creationCompleteHandler(event:FlexEvent):void
{
var ac:ArrayCollection = new ArrayCollection();

// init
ac.addItem("1");
ac.addItem("2");
ac.addItem("2");
ac.addItem("3");

var nac:ArrayCollection = new ArrayCollection();

// 循环放入新的arraycollection中，已经存在则不进行重新添加
for each(var item:String in ac)
{
if(nac.contains(item))
continue;
nac.addItem(item);
}

// 打印
for each(var nitem:String in nac)
{
trace(nitem);
}

}

]]>
</fx:Script>
</s:Application>

希望对楼主能有所帮助

Answer 2

代码如下：
var ac:ArrayCollection = new ArrayCollection();

// init
ac.addItem("1");
ac.addItem("2");
ac.addItem("2");
ac.addItem("3");

var nac:ArrayCollection = new ArrayCollection();

// 循环放入新的arraycollection中，已经存在则不进行重新添加
for each(var item:String in ac)
{
if(nac.contains(item))
continue;
nac.addItem(item);
}