javascript操作json方法

/*新增json的对象属性*/
var json = {};
json["subjectName"] = "ddd";

json.teacherlist = "A教师,B教师,C教师,D教师";

/*删除json的对象属性*/
var p = {
        "name" :  "chaomao",
        "age"     : 45,
        "sex"      : "male"
};

delete p.name

for(var i in p){
    alert(i)
    console.log(i);//输出age,sex，name项已经被删除了
}