Question

If I type c.messages.reverse.delete_at(0) nothing happens, where messages is the array. If I type c.messages.delete_at(0) it deletes the first element as it should. Why does this not work with reverse?

Answer 1

That happens because reverse returns a new array, of which you are deleting the last member. You could use reverse!, which mutates the original array.

If you want to remove the last element from an array, the best way would be to use pop.

>> arr = ["a", "b", "c"]
=> ["a", "b", "c"]
>> arr.pop
=> "c"
>> arr
=> ["a", "b"]