Question

Hi i have these records how i can find unique records in sort_by methods block

   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">]

how i can sort this array on base of unique team_name.The result should 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">]

Thanks

Answer 1

You could do something like:

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

or its brother

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

which will set arr to only the elements you want.