Example introduction to the role of IndexOf of Array in Flex

<?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" 
width="100%" height="100%" creationComplete="creationHandler(event)"> 
<s:layout> 
<s:BasicLayout/> 
</s:layout> 
<fx:Script> 
<![CDATA[ 
import mx.events.FlexEvent; 

/** 
* 初始化函数 
* indexOf用于在索引中从小到大查找 
* 如果查得到就返回索引值，查不到就返回-1 
*/ 
protected function creationHandler(event:FlexEvent):void 
{ 
var array:Array = ["桃树","梨树","松树","樟树"]; 
if(array.indexOf("梨树") != -1) 
{ 
trace("按索引从小到大查:"+array.indexOf("梨树")); 
} 
if(array.indexOf("樟树",3) != -1) 
{ 
trace("从第三个元素开始，按索引从小到大查:"+array.indexOf("樟树",3)); 
} 
} 

]]> 
</fx:Script> 
<fx:Declarations> 
<!-- 将非可视元素（例如服务、值对象）放在此处 --> 
</fx:Declarations> 
</s:Application>