关于给javascript对象添加、删除、修改对象的属性

以下是自己总结的几种方法

利用动态特性

1             function Person(){};
2             var person = new Person();
3             person.name = 'yy';
4             person.gender = 'girl';
5             console.log(person.name+','+person.gender);//yy,girl
6             delete person.name;//删除属性
7             console.log(person.name);//undefined
8 //            变式
9             function Person(){};
10             var person = new Person();
11             person['name'] = 'yy';
12             person['gender'] = 'girl';
13             console.log(person.name+','+person.gender);//yy,girl
14             delete person.name;//删除属性
15             console.log(person.name);//undefined

构造函数中this

var Person = function (){
this.name = 'yy';
this.gender = 'girl'
};
var person = new Person();
console.log(person.name+','+person.gender);//yy,girl

原型中添加属性

var Person = function (){
};
Person.prototype.name = 'yy';
Person.prototype.gender = 'girl';
var person = new Person();
console.log(person.name+','+person.gender);//yy,girl
console.log(person['name']+','+person['gender']);//yy,girl

字面量添加属性

var person = {
};
person.name = 'yy';
person.gender = 'girl';
console.log(person.name+','+person.gender);//yy,girl
console.log(person['name']+','+person['gender']);//yy,girl
//            另一种写法
var person = {
name: 'yy',
gender: 'girl'
};
console.log(person.name+','+person.gender);//yy,girl
console.log(person['name']+','+person['gender']);//yy,girl

封装extend方法

var p1 = {};
var p2 = {name:'yy',gender:'girl'};
p1.extend = function(obj){
for(var k in obj){
this[k] = obj[k];
}
}
p1.extend(p2);
console.log(p1.name+','+p1.gender);//yy,girl
console.log(p1['name']+','+p1['gender']);//yy,girl