数组排序

作者: 小雪洁 | 来源:发表于2020-03-16 14:09 被阅读0次

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>排序</title>
    </head>
    <body>
    </body>
    <script>
        let a=[3,8,2,5,9,0,4,7,1,34];
        a.sort();
        console.log(a);//[0, 1, 2, 3, 34, 4, 5, 7, 8, 9]默认的排序
        a.sort(function(a,b){
            return a-b;
        });
        console.log(a);// [0, 1, 2, 3, 4, 5, 7, 8, 9, 34]，升序排序
        a.sort(function(a,b){
            return b-a;
        });
        console.log(a);//[34, 9, 8, 7, 5, 4, 3, 2, 1, 0]，降序排序
        //数组元素是对象时的排序应用
        let cart=[
            {name:"phone",price:12000},
            {name:"imac",price:18000},
            {name:"ipad",price:3200}
        ];
        cart.sort(function(a,b){
            return a.price-b.price;
        });
        console.table(cart);//元素会按price升序排列
    </script>
</html>