JavaScript 深拷贝

 1 //代码读书记录，请勿转载。 产权非本人所有。  
   var util={
         getType:function(o){    //判断对象类型
             var _t;
             return ((_t = typeof(o)) == "object" ? o==null && "null" || Object.prototype.toString.call(o).slice(8,-1):_t).toLowerCase();
         },
          deepClone:function(source){    //深拷贝
              var destination=this.getType(source);
             destination=destination==='array'?[]:(destination==='object'?{}:source);
             for (var p in source) {
                if (this.getType(source[p]) === "array" || this.getType(source[p]) === "object") {
                    destination[p] = this.getType(source[p]) === "array" ? [] : {};
                     destination[p]=arguments.callee(source[p]);
                 } else {
                    destination[p] = source[p];
                 }
             }
           return destination;
       }
     };


     var obj1={attr:100};
     var obj2=util.deepClone(obj1);    //将obj1深拷贝到obj2
     obj2.attr=200;    //修改obj2的属性值
     console.log(obj1.attr);    //obj1属性值未发生变化