operation-on-december-24
/
jjs.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

</body>
<script>
    // ### 1. 字符串"要考试了,要好好复习,不要挂科",取满里面5个不同的字符，逗号能一个字符
    var str = "要考试了,要好好复习,不要挂科";


    var han = {
        handle: function (arr = []) {
            var shuzu = str[Math.floor(Math.random() * (str.length))];
            if (arr.length < 5) {
                if (arr.indexOf(shuzu) == -1) {
                    arr.push(shuzu);
                }
                this.handle(arr);
            }
        }
    }
    var arr = [];
    han.handle(arr);
    console.log(arr);
    // 取出student,按date 进行升序排列;

    var stu = {
        "data": {
            'list': [{
                'student': [
                    { date: '2022 10/1', 'name': '张三', 'pid': 0 },
                    { date: 1665648330145, 'name': '张三三', 'pid': 1 },
                    { date: 1655648330145,name: '李四', 'pid': 2 },
                    { date: '2022 10/3', 'name': '李四四', 'pid': 3 },
                    { date: '2020 10/3', 'name': '王五', 'pid': 3 },
                ]
            }]
        }
    }
    var student = stu.data.list[0].student
    console.log(student);
    student.sort(function (a, b) {
        var date1 = new Date(a.date);
        var date2 = new Date(b.date);
        return date1 - date2

    });
    console.log(student);

</script>

</html>