JavaScript---OOP浅谈1

对象化编程-------简单地去理解就是把javascript能涉及到的范围分成各种对象，对象下面再次划分对象。编程出发点多是对象，或者说基于对象。所说的对象既包含变量，网页，窗口等等。

注意：对象只是一种特殊的数据

1.基本对象

我们一般划分的角度还是从数据类型这方面
Number
String
Array
Math
Data  
这边我只是简单地罗列出来部分，具体的可以参考http://www.w3school.com.cn/js/js_obj_intro.asp

2.下面介绍创建类和对象的模式

a.简单方式：

var people = {};
people.name = "steven";
people.age = 23;
people.getName = function () {
	return "People's name is " + this.name;
};

console.log(people.getName()); //People's name is steven
console.log(people.age); //23

不好的地方就是：在创建多个对象的场景下会产生很多冗余的代码，耦合度不高！

b.工厂模式：

function makePeople(name, age, job) {
	var _obj = {};
	_obj.name = name;
	_obj.age = age;
	_obj.job = job;
	_obj.getName = function () {
		return "People's name is " + this.name;
	}
	return _obj;
}

var webdesigner = makePeople("steven", 23, "wendesigner");
console.log(webdesigner.getName); //People's name is steven
console.log(webdesigner.job) //wendesigner

不好的地方就是：实例化比较频繁

c.原型模式(prototype)

function People(){};
People.prototype = {
       constructor :People,
       name:"steven",
       age:23,
       job:"webdesigner",
       getName:function(){
             return "People's name is "+this.name;
      }
}
  
var webdesign = new People();
var carman = new People();
console.log(webdesign.getName());    //People's name is steven
console.log(carman.getName());    //People's name is steven

不好的地方就是：初始化参数不支持传递，还有就是原型的所有属性和方法会被所有的实例共享

d.混合模式（原型 + 构造函数）

function People(name.age.job) {
	this.name = name;
	this.age = age;
	this.job = job;
};
People.prototype = {
	constructor : People,
	getName : function () {
		return "People's name is " + this.name;
	}
}

var webdesigner = new People("steven", 23, "webdesigner");
var carman = new People("zyc", 24, "carman");
console.log(webdesigner.getName()) //People's name is steven
console.log(carman.getName()) //People's name is zyc

不好的地方就是：对象的属性和方法也是共用的

e.闭包下的私有变量模式

(function () {
	var name = "";
	People = function (val) {
		name = val;
	};
	People.prototype = {
		constructor : People,
		getName : function () {
			return "People's name is " + name;
		}
	};
})();

var webdesigner = new People("steven");
console.log(webdesigner.name); //undefined
console.log(webdesigner.getName()); //People's name is steven

var carman = new People("zyc");
console.log(carman.name); //undefined
console.log(carman.getName()); //People's name is zyc

不好的地方就是：初级程度的代码不是很让人理解

如果我写的有问题，还是对这里的内容有疑惑，都希望大家提出来！