Convert array of hashes to array

Question

I have an array of hashes from which I need the values of the hashes in a new array. The array of hashes look likes this, with a couple thousand of them.

array =         


        

Answer 1

arr =[{:code=>"404"}, {:code=>"302"}, {:code=>"200"}]

arr.map { |h| h[:code] }
  #=> ["404", "302", "200"]

or, if the name of the key (now :code) might change in future:

arr.map { |h| h.first.last }
  #=> ["404", "302", "200"]