js 数组重排序 sort 的用法

js 数组重排序 sort 的用法

// 假如我们拿到一个没有排过序数组
// 我们需要根据数组中某个值来排序该怎么办
// 解决办法如下

let userInfo = [{
        name: "张三",
        age: 28
    },
    {
        name: "李四",
        age: 24
    }, {
        name: "王五",
        age: 22
    }, {
        name: "*",
        age: 26
    }, {
        name: "江海",
        age: 24
    }, {
        name: "江波",
        age: 25
    },
]
let newUserInfo = userInfo.sort((a, b) => {
    return a.age - b.age;
});

console.log(JSON.stringify(newUserInfo));

//  输出 [{"name":"王五","age":22},{"name":"李四","age":24},{"name":"江海","age":24},{"name":"江波","age":25},{"name":"*","age":26},{"name":"张三","age":28}]


// let newUserInfo = userInfo.sort((a, b) => {
//   return  b.age - a.age;
// });

// console.log(JSON.stringify(newUserInfo));

//  输出 [{"name":"张三","age":28},{"name":"*","age":26},{"name":"江波","age":25},{"name":"李四","age":24},{"name":"江海","age":24},{"name":"王五","age":22}]