Javascript 模拟 new

function Person(name, sex){
    this.hobby = ‘shopping‘;
    this.name = name;
    this.sex = sex;
    this.sayName = function(){
        console.log(this.name)
    };
}
Person.weight = ‘60kg‘;
Person.prototype.friend = ‘rose‘;
var person = new Person(‘jack‘,‘age‘);
person.sayName();

function Create(){
    var obj = {};
    var Constructor = [].shift.call(arguments);
    obj.__proto__ = Constructor.prototype;
    Constructor.apply(obj,arguments);
    return obj;
};
var person = Create(Person,‘jack‘,‘age‘);
person.sayName();