ruby-on-rails - 如何在 Ruby on rails 中获取数组的最后一行？

Question

<%= m.members %>

这会在下面返回这个数组。如果我只想获取这个数组的最后一行（Ray 的记录），我该如何编码？

[#<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

如果我们想获取最后一个和第一个元素，如下所示：
例如：arr = [1,2,3,4]
$> arr.last => 4
$> arr.first => 1