JS中多種方式創建對象

1.內置對象創建

var girl=new Object();
    girl.name='hxl';
    console.log(typeof girl);

2.工廠模式,寄生構造函數模式

function Person(name){
        var p=new Object();//內部進行實例化
        p.name=name;
        p.say=function(){
            console.log('my name is '+ p.name);
        }
        return p;//註：一定要返回
}
var girl=Person('haoxioli');
girl.say();

3.構造函數創建

var Product=function(name){
        this.name=name;
        this.buy=function(){
            console.log('我衣服的牌子是'+this.name);
        }
}
    var pro=new Product('真維斯');
    pro.buy();

4.原型創建,缺點：實例中的每個屬性有可能會不一樣

var Role=function(){}
    Role.prototype.name={nickName:'昵稱'};
    var boy=new Role();
    boy.name.nickName='劉曉兵';
    console.log(boy.name.nickName);//劉曉兵
    var girl=new Role();
    girl.name.nickName='郝曉利';
    console.log(boy.name.nickName);//郝曉利,因為實例對象可以修改原型中的引用對象的值
    console.log(girl.name.nickName);//郝曉利

5.混合模式：原型+構造，可以把不讓實例修改的屬性放到構造函數中，可以修改的放原型中

var Role=function(){
        this.name={nickName:'aaa'};
    }
    Role.prototype.age=30;
    var boy=new Role();
    boy.name.nickName='boy';
    console.log(boy.name.nickName);//boy
    var girl=new Role();
    girl.name.nickName='girl';
    console.log(boy.name.nickName);//boy,實例不會修改構造函數中的值
    console.log(girl.name.nickName);//girl

6.字面量形式

var cat={
        name:'lucy',
        age:3,
        sex:'母'
    };//將對象轉換成字元串
    console.log(JSON.stringify(cat));//{"name":"lucy","age":3,"sex":"母"}
    var dog='{"name":"john","sex":"公"}';
    console.log(JSON.parse(dog).name);//將字元串轉為對象

7.拷貝模式

function extend(tar,source){
        for(var i in source){
            tar[i]=source[i];
        }
        return tar;
    }
    var boy={name:'醉俠客',age:20};
    var person=extend({},boy);
    console.log(person.name);

8.第三方框架

//先引入包
<script src='js/base2.js'></script>
//base2框架，Base.extend及constructor都是固定用法
    var Animal=Base.extend({
        constructor:function(name){
            this.name=name;
        },
        say:function(meg){
            console.log(this.name+":"+meg);
        }
    });
    new Animal('lily').say('fish');

另一個第三方框架

<script src='js/simplejavascriptinheritance.js'></script>
//simplejavascriptinheritance框架,Class.extend及init都是固定用法
    var Person=Class.extend({
       init:function(name){
           this.name=name;
       }
    });
    var p=new Person();
    p.name='over';
    console.log(p.name);