js 处理json对象数据

<!DOCTYPE html>
<html lang="zh-cn">

<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <title>测试cookie</title>
    <script src="jquery-1.11.2.min.js"></script>
    <script src="jquery.cookie.js"></script>

    <script>

        var initData = [{ "id": 1, "num": 10, "title": "矿泉水" }, { "id": 2, "num": 10, "title": "橙汁" }];

        $(function () {

            //简单存储
            $.cookie("test-001", JSON.stringify(initData));
            var data = existOrSave("test-001");

            for (var i = 0; i < data.length; i++) {
                console.log("修改之前", data[i].id, data[i].num, data[i].title);
            }
            //新增
            addData(25, 150, "农夫山泉", data);
            //修改指定记录
            updateData(1, 1000, data);

            for (var i = 0; i < data.length; i++) {
                console.log("修改之后", data[i].id, data[i].num, data[i].title);
            }

            //删除指定记录
            var newData = deleteData(2, data);
            for (var i = 0; i < newData.length; i++) {
                console.log("删除之后", newData[i].id, newData[i].num, newData[i].title);
            }


            var newData2 = getData(25, newData);
            console.log("获取记录", newData2.id, newData2.num, newData2.title);


            //

            var data2 = existOrSave("test-002");
            if (data2.length <= 0) {
                console.log("无数据");
            }


        })

        //判断是否存在，如果...
        var existOrSave = function (key) {
            var resultData = $.cookie(key)
            if (!resultData || resultData == undefined) {
                return resultData = [];
            }
            return JSON.parse($.cookie(key));
        }


        //新增数据记录
        var addData = function (id, num, title, data) {
            data.push({ "id": id, "num": num, "title": title });
        }

        //修改数据记录
        var updateData = function (id, num, data) {
            for (var i = 0; i < data.length; i++) {
                if (data[i].id === id) {
                    data[i].num = num;
                }
            }
        };

        //删除数据记录
        var deleteData = function (id, data) {
            var tempData = [];
            for (var i = 0; i < data.length; i++) {
                if (data[i].id === id) {
                    delete data[i];
                } else {
                    tempData.push(data[i]);
                }
            }
            return tempData;
        }

        // 根据ID返回一条记录
        var getData = function (id, data) {
            var tempData = {};
            for (var i = 0; i < data.length; i++) {
                if (data[i].id === id) {
                    tempData = data[i];
                    break;
                }
            }
            return tempData;
        }
    </script>
</head>


<body>
    <div>
        测试cookie
    </div>
</body>

</html>

相关阅读:
面试题：链表倒数第k个节点
 面试题：重建二叉树
 面试题：从尾到头打印链表
 面试题：第一个出现的字符位置
 面试题：调整数组顺序
 面试题：有限制条件的求和
 面试题：Fibonacci数列
 面试题：旋转数组的最小数字
 面试题：替换空格
 EndNote8破解版下载安装
原文地址：https://www.cnblogs.com/qk523/p/8296422.html