javascript常用函数封装

1.生成唯一页面标识

function newGuid() {
        var guid = "";
        for (var i = 1; i <= 32; i++) {
            var n = Math.floor(Math.random() * 16.0).toString(16);
            guid += n;
        }
        guid += new Date().getTime();
        return guid.toUpperCase();
    }

    console.log(newGuid());//9C0F3EF3ECBA28048B313B4997DD67261647909343212

2.遍历二维数组去重

var arr = [];
    for (var i = 0; i < data.length; i++) {
        //判断当前数组下标为i的元素是否已经保存到临时数组
        //如果已保存，则跳过，否则将此元素保存到临时数组中
        if (JSON.stringify(arr).toString().indexOf(data[i].deviceid) == -1) {
            arr.push({
                deviceid: data[i].deviceid,
                devicename: data[i].devicename,
                alarmtime: data[i].alarmtime,
                alarmvalue: data[i].alarmvalue,
                ip: data[i].ip
            });
        }
    }

    console.log(arr)

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