JavaScript创建对象

// 工厂模式
function createPerson(name, age){
    var o = new Object();
    o.name = name;
    o.age = age;
    o.show = function(){
        alert("hello s");
    };
    return o;
}
var person = createPerson("zhangsan", "22");
person.show(); 

hello s

// 构造函数模式
function Person(name,age){
    this.name = name;
    this.age = age;
    this.show = function(){
        alert("hello");
    }
}
var person = new Person("zhangsan", "20");
person.show();

hello

// 原型模式
function Person(){
}
Person.prototype.name = "kuikui";
var person = new Person();
alert(person.name);

kuikui

// 组合构造原型
function Person(name,age){
    this.name = name;
    this.age = age;
    this.show = function(){
        alert("hello");
    }
}
Person.prototype = {
    constructor :Person,
    name : "kuikui",
    say : function(){
        alert("say me");
    }
}
var person1 = new Person("aa","23");
person1.say();
alert(person1.name);//构造优先原型 aa

say me
aa

// 动态原型
function Person(name, age){
    this.name = age;
    this.age = age;
    if(typeof this.show != "function"){
        this.show = function(){
            alert("构造 show");
        }
    }
    this.test = function(){
        alert("构造 test");
    }
}
Person.prototype = {
    show : function(){
        alert("原型 show")
    }
}
var person = new Person();
var person1 = new Person();
person.show();
person1.test();
//alert(Person.prototype.show); 

原型 show
构造 test