js中创建对象的几种方式

/*字面量的形式创建*/
        var yyk = {
            name:"yyk",
            age:24
        }
        /*通过构造函数创建*/
        var yyk = new Object();
        yyk.sex='男';

        /*通过工厂创建*/
        function createYYK(name,age,sex) {
            let o = new Object();
            o.name=name;
            o.age=age;
            o.sex=sex;
            o.sayName=function () {
                alert(name)
            }
            return o;
        }
        /*通过构造函数创建*/
        function YYK(name,age,sex) {
            this.name = name;
            this.age = age;
            this.sex = sex;
        }
        /*通过圆形模式创建*/
        function YYK() {}
        YYK.prototype.age="24";
        YYK.prototype.name="24";
        YYK.prototype.sex="24";
        /*prototype可以给YYK添加新的属性*/
        /*prototype实现继承*/
        function Persion(name,age,sex) {
            this.name=name;
            this.age=age;
            this.sex=sex;
        }
        function Student() {

        }
        Student.prototype = new Persion();//子类的对象用父类声明
        Student.prototype.walk=function () {
            alert("正在走")
        }



        !function () {
            let yYk = new YYK("yyk",24,"男");
            let p = createYYK("yyk",24,"男")
            let student = new Student();
            alert(student.sex)
        }();