javascript - 按升序和降序对多个数组键进行排序，带数字的字符串

Question

我有一个 JavaScript 对象数组:

这不是一个重复的问题。因为，我有一个包含 2 个键(key、count)的对象数组。我想排序，key 升序(string)和 value 降序(number)订单。

 var array = [
  {"count":7,"key":"a"},
  {"count":10,"key":"b"},
  {"count":5,"key":"c"},
  {"count":10,"key":"a"},
  {"count":3,"key":"d"}
];

期望的输出:

     var array = [
      {"count":10,"key":"a"},
      {"count":10,"key":"b"},
      {"count":7,"key":"a"},
      {"count":5,"key":"c"},
      {"count":3,"key":"d"}
    ];

var array = [{"count":7,"key":"a"},{"count":10,"key":"b"},{"count":5,"key":"c"},{"count":10,"key":"a"},{"count":3,"key":"d"}];

console.log(array.sort((a, b) => (b.count - a.count)));

key 排序为升序

count 按降序

排序

我使用了 array.sort((a, b) => (b.count - a.count)) 方法来排序计数。但是，无法弄清楚如何对对象的两个键进行排序。

Answer 1

您必须将逻辑 || operator 与 localeCompare 函数结合使用。

如果 b.count - a.count 结果为 0，

|| 运算符将只考虑第二个分量。

var array = [{"count":7,"key":"a"},{"count":10,"key":"b"},{"count":5,"key":"c"},{"count":10,"key":"a"},{"count":3,"key":"d"}];

console.log(array.sort((a, b) => b.count - a.count || a.key.localeCompare(b.key)));