json添加、删除、遍历属性

<script>
    var obj={"age":12,"name":"huangbiao"};
    alert(obj.age);
    alert(obj.name);
    //添加属性
    obj["sex"] = "boy";    或  obj.sex="男";
    //遍历JSON对象
    for(var index in obj){
        alert(index);
        alert(obj[index]);
    }
    //删除JSON属性
    delete obj.age;
    alert(obj.age);
</script>

　　//json 数组对象

var productArr = [
{"pName":"笔记本","price":"4800","address":"广东富山"},
{"pName":"鼠标","price":"50","address":"北京"},
{"pName":"空调","price":"1300","address":"格力"}
];

//添加对象

productArr.push({"pName":"sssssss","price":"1300","address":"格力"});

var str1 = {"name": "apple", "sex": "21"};

 

// 参数：prop = 属性，val = 值

function createJson(prop, val) {

 // 如果 val 被忽略

 if(typeof val === "undefined") {

 // 删除属性

 delete str1[prop];

 }

 else {

 // 添加 或 修改

 str1[prop] = val;

 }

}