var userlist={
"row1":{name:"张三",age:},
"row2":{name:"李四",age:}
}
//方法一
userlist.row1.sex="女";//添加
userlist.row3={name:"json",age:};//添加
userlist.row1.name="kk" ;//修改
userlist.row1={name:"tiger",age:};//修改
delete userlist.row3.age;//删除
delete userlist.row3;//删除
//方法二
userlist["row2"].sex="女";//添加
userlist["row4"]={name:"free",age:};//添加
userlist["row2"].sex="男";//修改
userlist["row2"]={name:"chfree",age:,sex:"男"};//修改
delete userlist["row2"].sex;//删除
delete userlist["row2"];//删除
console.log(userlist);