AS3 数组的深度复制

import flash.utils.ByteArray;
var a:Array=["a","b"];
var b:Array=[];
b=clone(a);
trace(b);

function clone(source:Object):*
{
var myBA:ByteArray = new ByteArray();
myBA.writeObject(source);
myBA.position = 0;
return(myBA.readObject());
}