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var obj = new Object();
var objRef = obj; //objÓëobjRefÖ¸Ïòͬһ¸ö¶ÔÏó,objRefÊÇÒ»¸öÒýÓÃ
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var items = new Array("one","two","three");
var itemsRef = items; //´´½¨Ò»¸öÒýÓÃ
items.push("four");
alert(items.length == itemsRef.length); //´ËʱÁ½Õß³¤¶ÈÒ»Ö£¬ÒòΪָÏòͬһ¸ö¶ÔÏó
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var items = new Array("one","two","three");
var itemsRef = items;
items = new Array("new"); //´ËʱitemsÓëitemsRefÖ¸Ïò²»Í¬¶ÔÏó
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var item = "test";
var itemRef = item;
item += "ing";
alert(item != itemRef); //´ËʱitemÓëitemRefÖ¸Ïò²»Í¬¶ÔÏó
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http://yuiblog.com/blog/2007/06/12/module-pattern/
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