[js] clone

#函数复制

            Function.prototype.clone = function() {
                var s = this.toString();
                var front = s.replace(/^[^\(]*\(/, '');
                var middle = front.replace(/\)[^\)]*\{[\s\S]+\}$/, '');
                var after = front.replace(/^[^\{]*\{|\}$/g, '');
                if (middle) {
                    return new Function(middle, after);
                }
                return new Function(after);
            };

#

            Function.prototype.clone = function() {
                return new Function('return ' + this.toString())();
            };

 

# Number、String、Object、Array、Boolean  值复制

            function clone(Obj) {
                var buf;
                //指针
                if (Obj instanceof Array) {
                    buf = []; //创建一个空的数组 
                    var i = Obj.length;
                    while (i--) {
                        buf[i] = clone(Obj[i]);//防止属性是数组或对象
                    }
                    return buf;
                } else if (Obj instanceof Object) {
                    buf = {}; //创建一个空对象 
                    for (var k in Obj) { //为这个对象添加新的属性 
                        buf[k] = clone(Obj[k]);
                    }
                    return buf;
                } else { //普通变量直接赋值
                    return Obj;
                }
            }
            console.log(clone(['xx','yy','zz']));
            console.log(clone({'a':'xx','b':'yy','c':'zz'}));
            console.log(clone(233));