AS3中的xml

看例子

var xml:XML =<s/>;
trace(xml.ddd);//空串
trace(typeof(xml.ddd));//xml
trace(xml.ddd.toString());//空串
trace(xml.ddd.toXMLString());//空串
trace(xml.ddd.length());//0

足以证明，xml是个特殊的object

var xml:Object = {};
trace(xml.ddd);//undefined
trace(typeof(xml.ddd));//undefined
trace(xml.ddd.toString());//报错
trace(xml.ddd.toXMLString());//报错
trace(xml.ddd.length());//报错

回头看看这个帖子，感觉自己当初好傻，貌似是有了Proxy类以后就比较好解释这个问题了吧

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