JavaScript中對數組的排序

將下列對象數組，通過工資屬性，由高到低排序



        var BaiduUsers = [], WechatUsers = [];

        var User = function(id, name, phone, gender, age, salary) {
        this.id = id;
        this.name = name;
        this.phone = phone;
        this.gender = gender;
        this.age = age;
        this.salary = salary;
        };
        User.create = function(id, name, phone, gender, age, salary) {
        return new User(id, name, phone, gender, age, salary);
        };
        BaiduUsers.push(User.create(1, 'tommy', '1111','male', 18, 2800));
        BaiduUsers.push(User.create(2, 'jerry', '2222','male', 28, 5800));
        BaiduUsers.push(User.create(3, 'raobin','3333','female', 14, 1200));
        BaiduUsers.push(User.create(4, 'binbin','4444','male', 23, 9800));
        BaiduUsers.push(User.create(5, 'arthur','5555','female', 22, 3000));
        WechatUsers.push(User.create(1, 'tommy', '1111','male', 20, 4000));
        WechatUsers.push(User.create(2, 'allen', '6666','male', 34, 15800));
        WechatUsers.push(User.create(3, 'raobin','3333','female', 16, 2300));
        WechatUsers.push(User.create(4, 'harvey','7777','male', 30, 29800));
        WechatUsers.push(User.create(5, 'yuyu', '8888','female', 27, 7000));
        　　

        對於一般的數組，可以用sort函數，對於對象數組呢

        var points = [40,100,1,5,25,10];
        points.sort(function(a,b){return a-b});




        那么考點在哪里呢？實際上在於數組對象的sort方法。

        Array.sort(fun)
        fun是一個函數，排序根據這個函數返回值來進行判斷，如果返回值小於0表示兩個元素不需要交換位置，1表示要用交互位置，0表示相等，實際上<=0等效。

        sort方法有兩個注意點：

        會操作原始數組，經過操作后原始數組發生變化
        默認排序按照字符編碼排序，例如，我們有下面的一個例子：
        https://www.cnblogs.com/webcabana/p/7460038.html



        需要定義下sortBy方法，然后進行調用即可

        BaiduUsers.sort(sortBy("salary"))

        如果存在工資相等的情況，要求按照年紀排序，應該如何定義SortBY方法呢？

        var BaiduUsers = [], WechatUsers = [];
        var User = function(id, name, phone, gender, age, salary) {
        this.id = id;
        this.name = name;
        this.phone = phone;
        this.gender = gender;
        this.age = age;
        this.salary = salary;
        };
        User.create = function(id, name, phone, gender, age, salary) {
        return new User(id, name, phone, gender, age, salary);
        };
        BaiduUsers.push(User.create(1, 'tommy', '1111','male', 18, 10000));
        BaiduUsers.push(User.create(2, 'jerry', '2222','male', 28, 10000));
        BaiduUsers.push(User.create(3, 'raobin','3333','female', 14, 1200));
        BaiduUsers.push(User.create(4, 'binbin','4444','male', 23, 9800));
        BaiduUsers.push(User.create(5, 'arthur','5555','female', 22, 10000));






        function sortBy(field1,field2) {
        return function(a,b) {
        if(a.field1 == b.field1) return a.field2 - b.field2;
        return a.field1 - b.field1;
        }
        }

        BaiduUsers.sort(sortBy("salary","age"));
        　　




        貌似不正確ing