From: Gijs N.
def translate_to_braille(msg)
I think you want the String#tr method. It replaces each character in a
source string with its corresponding character in a replacment string:
normal_alphabet = “abcdefghijklmnopqrstuvwxyz”
rot13_alphabet = “nopqrstuvwxyzabcdefghijklm”
msg = “hello world!”
puts msg.tr( normal_alphabet, rot13_alphabet)
#=> uryyb jbeyq!