突然想到有一回面试的时候有一个问题一直挂在心头，于是乎在网上找了找，这个比较好：

 

//深度克隆        function deepClone(obj) {            var result, oClass = isClass(obj);            //确定result的类型            if (oClass === "Object") {                result = {};            }else if (oClass === "Array") {                result = [];            }else {                return obj;            }            for (key in obj) {                var copy = obj[key];                if (isClass(copy) == "Object") {                    result[key] = arguments.callee(copy); //递归调用                }                else if (isClass(copy) == "Array") {                    result[key] = arguments.callee(copy);                }                else {                    result[key] = obj[key];                }            }            return result;        }        //返回传递给他的任意对象的类        function isClass(o) {            if (o === null) return "Null";            if (o === undefined) return "Undefined";            //从第九位开始截取            return Object.prototype.toString.call(o).slice(8, -1);        }        var oPerson = {            oName: "rookiebob",            oAge: "18",             oAddress: {province: "beijing"},             ofavorite: ["swimming", {reading: "history book"}],             skill: function () {console.log("bob is coding");}        };        //深度克隆一个对象        var oNew = deepClone(oPerson);        console.log(oNew);

 

本代码转自：