创建对象的方法总结

原始模式

var obj = new Object();
obj.name = "Mary";
obj.age = "20";

工厂模式

function createPerson(name, age) {
var o = new Object();
o.name = name;
o.age = age;
o.sayName = function () {
alert(this.name);
}

return o;
}

var person1 = createPerson("Mary", "20");
var person2 = createPerson("Bob", "15");

构造函数模式

function Person(name, age) {
this.name = name;
this.age = age;
this.sayName = function () {
alert(this.name);
}
}

var person1 = new Person("Mary", "20");
var person2 = new Person("Bob", "15");

原型模式

function Person() {

}

Person.prototype.name = "Mary";
Person.prototype.age = "20";
Person.prototype.sayName = function () {
alert(this.name);
};

var person1 = new Person();
var person2 = new Person();

person1.sayName(); //Mary
person2.sayName(); //Mary