as3 formatName 功能实现

package
{
	import flash.display.Sprite;
	
	/**
	 * format、formatName的功能实现
	 * @author jave.lin
	 * @date 2013-5-13
	 */	
	public class TestAS3Regex extends Sprite{
		
		public function TestAS3Regex()
		{
			var str1:String = "杰卫，这里有{0}个苹果，和{1}个香蕉！{0}个苹果{3} 元，{1}个香蕉{4} 元，一共{2}钱";
			var str2:String = "Hei jave, there are {0} apples，and {1} banana！ {2} dollar all together";
			
			
			trace(format(str1, 5, 10, 20, 7, 13));
			trace(format(str2, 5, 10, 20));
			
			var str3:String = "{call}这是{structname}结构代换你的懂。";
			var str4:String = "{num1}+{num2}={sum}";
			
			trace(formatName(str3, {call:"哥，", structname:"k,v数据"}));
			trace(formatName(str4, {num1:100, num2:300, sum:100+300}));
		}
		
		private function format(str:String, ...args):String{
			for(var i:int = 0; i