JS_应用对象的复制

Object.extend = function(destination, source){   
        for (var property in source) {   
            destination[property] = source[property];   
            }   
        return destination;   
}
/*字符串*/
var string = new String("hello");
var string1 = string;
var string2 = string;
string1 = string1+" world!";
console.log(string+"|"+string1+"|"+string2);
/*数组*/
var arr = [2012,11,12]
var arr1 = arr.slice(0);
var arr2 = arr.slice(0);
arr2.push("4");
console.log(arr+"|"+arr1+"|"+arr2);
/*对象*/
var obj = {name:"shao"};
var obj1 = Object.extend({},obj);
var obj2 = Object.extend({},obj);
obj1.name = "liang";
console.log(obj.name+"|"+obj1.name+"|"+obj2.name);