如何在Ruby on Rails中獲取數組的最後一行？

Question

<%= m.members %> 

下面給出了這個數組。如果我只想得到這個數組的最後一行（Ray的記錄），我該如何編碼？

[#<User id: 4, username: "John", age: 27, deleted_at: nil>, 
#<User id: 8, username: "Mike", age: 27, deleted_at: nil>, 
#<User id: 13, username: "Ray", age: 27, deleted_at: nil>] 

Answer 1

[#<User id: 4, username: "John", age: 27, deleted_at: nil>, 
#<User id: 8, username: "Mike", age: 27, deleted_at: nil>, 
#<User id: 13, username: "Ray", age: 27, deleted_at: nil>].last 

如果我們想獲得最後和第一要素如下：
例：ARR = [1,2,3,4]
$>arr.last => 4
$>arr.first => 1