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
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- 对象的含义
- 属性-------对象的某些特定的性质
- 方法-------对象能做的事情
- 事件-------能响应发生在对象上的事情
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Number?
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String
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Array
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Math
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Date ??
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
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不过我这边还是想讲一下比较流行的一道前端面试题，也是我当初来百度面试的时候问我的（题目的来源好像是方荣大侠的某个web前端研发工程师编程能力成长之路的文档里面的）
废话少说------出题：
?? ? ? ? ? ? ? ? ? ? ? “输出字符串--今天是星期几”
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答案1：
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var _str = "";
var _today = new Date().getDay();
if(_today == 0){
_str = "今天是星期日"；
}else if(_today == 1){
_str = "今天是星期一"；
}else if(_today == 2){
_str = "今天是星期二"；
}else if(_today == 3){
_str = "今天是星期三"；
}else if(_today == 4){
_str = "今天是星期四"；
}else if(_today == 5){
_str = "今天是星期五"；
}else if(_today == 6){
_str = "今天是星期六"；
}
?答案2：
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var _str ="今天是星期";
var _today=new Date().getDay();
switch(_today){
case 0:
_str += "日"；
break;
case 1:
_str += "一"；
break;
case 2:
_str += "二"；
break;
case 3:
_str += "三"；
break;
case 4:
_str += "四"；
break;
case 5:
_str += "五"；
break;
case 6:
_str += "六"；
break;
}
?答案3：
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var _arr = new Array("日","一","二","三","四","五","六");
var _today = new Date().getDay();
var _str = "今天是星期"+_arr[_today ];
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?答案4：
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var _str = "今天是星期"+"日一二三四五六".charAt(new Date().getDay());
?3.?
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
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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
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
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?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
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不好的地方就是:对象的属性和方法也多是公用的
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(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:初级程度代码不是很让人理解
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