ruby - 我如何根据 sort_by rails 中的某些属性找到 uniq 记录

Question

嗨，我有这些记录，我如何在 sort_by 方法块中找到唯一记录

   my array is like this

     [#<Post id: 1, name: "ali", team_elo: 0, team_name: "solo", created_at: 
     "2012-12-09  16:11:17", updated_at: "2012-12-11 03:39:43">,
     #<Post id: 2, name: "ramiz", team_elo: nil, team_name: "roko", created_at: 
     "2012-12-11 03:40:31", updated_at: "2012-12-11 03:40:31">,
     #<Post id: 3, name: "ramizrt", team_elo: nil, team_name: "joko", created_at: 
      "2012-12-11 03:40:47", updated_at: "2012-12-11 03:40:47">,
     #<Post id: 4, name: "lee", team_elo: nil, team_name: "roko", created_at: 
       "2012-12-11 03:41:15", updated_at: "2012-12-11 03:41:15">]

我如何根据唯一的 team_name 对这个数组进行排序。结果应该是这样的

       [#<Post id: 1, name: "ali", team_elo: 0, team_name: "solo", created_at: 
     "2012-12-09  16:11:17", updated_at: "2012-12-11 03:39:43">,
     #<Post id: 2, name: "ramiz", team_elo: nil, team_name: "roko", created_at: 
     "2012-12-11 03:40:31", updated_at: "2012-12-11 03:40:31">,
     #<Post id: 3, name: "ramizrt", team_elo: nil, team_name: "joko", created_at: 
      "2012-12-11 03:40:47", updated_at: "2012-12-11 03:40:47">]

谢谢

Answer 1

您可以执行以下操作：

arr = arr.uniq { |x| x.team_name }

或其兄弟

arr.uniq! { |x| x.team_name }

它将arr仅设置为您想要的元素。