在Javascript操作JSON对象，增加 删除 修改的简单实现

obj2 = { teacher: [ { name: "jordan",sex: "m",age: "40" },{ name: "bryant",age: "28" },{ name: "McGrady",age: "27" } ]};

var jsonobj2New = {};
$("#btn").click(function () {
//invoke the update
updateData("jordan");
var persons = jsonobj2.teacher;
for (var i = 0; i < persons.length; i++) {
var cur_person = persons[i];
alert(cur_person.seX);
}

//invoke the delete
deleteData("jordan");
var persons = jsonobj2.teacher;
for (var i = 0; i < persons.length; i++) {
  var cur_person = persons[i];
  alert(cur_person.seX);
}

//push 
var temp = { name: "kenny",age: "25" };
jsonobj2.teacher.push(temp);

var persons = jsonobj2.teacher;
for (var i = 0; i < persons.length; i++) {
  var cur_person = persons[i];
  alert(cur_person.Name);
}

});

function updateData(Name) {
var persons = jsonobj2.teacher;
//alert(Name);
for (var i = 0; i < persons.length; i++) {
var cur_person = persons[i];
if (cur_person.name == Name) {
persons[i].sex = "f";
}
}
}

function deleteData(Name) {
var persons = jsonobj2.teacher;
//alert(Name);
for (var i = 0; i < persons.length; i++) {
var cur_person = persons[i];
if (cur_person.name == Name) {
jsonobj2.teacher.splice(i,1);
}
}
}