在内部数组中按一定值对数组数组进行排序

Question

我有以下数组：

test = [["E","188","12314","87235"],["B","1803","12314","87235"],["C","1508","12314","87235"]]

我想用内部数组中的第二个值（188,1803,1508）对整个数组进行排序。所以这就是我想要的。

test = [["E","188","12314","87235"],["C","1508","12314","87235"],["B","1803","12314","87235"]]

实现这一目标的最有效方法是什么？我需要写一个sort来做吗？

Answer 1

您可以使用sort_by：

来实现

test.sort_by { |e| e[1].to_i }

Answer 2

使用@Maxim的答案，但你也可以写：

test.sort { |e,f| e[1].to_i <=> f[1].to_i }
  #=> [["E",  "188", "12314", "87235"],
  #    ["C", "1508", "12314", "87235"],
  #    ["B", "1803", "12314", "87235"]]