no problema, using morse_codes varibale works fine!

is declared as a module attribute:

defmodule MorseCode do
  
  @morse_code morse_code
  
  def decode(code) do
    @morse_code["..."]
  end

end

ummm, i tried your solution without success, i'm always getting:

solution:61: undefined function morse_code/0

this is one of the best solution for me
cheers!