swift - 如何有效地以相反的顺序对对象数组进行排序？

Question

假设我有一个字典数组:

[ { "id": 2 }, { "id": 59 }, { "id": 31 } ... ]

如何对其进行排序，使其按“id”降序排列？

我最初的做法是这样的:

Loop through each element, find the biggest one, and put it into a new array. Then, remove that from the element. Repeat.

但我知道这是错误的而且效率不高。

Answer 1

您可以在 Swift 中使用排序功能。像这样:

let arr = [["id": 2], ["id": 59], ["id": 31]]
let sortedArr = arr.sort { Int($0["id"]!) > Int($1["id"]!) }