Generate letters to represent number using ruby?

Question

I would like to generate a sequence of letters i.e. \"A\", \"DE\" \"GJE\", etc. that correspond to a number. The first 26 are pretty easy so 3 returns \"C\", 26 returns \"Z\

Answer 1

I liked this answer from: https://stackoverflow.com/a/17785576/514483

number.to_s(26).tr("0123456789abcdefghijklmnopq", "ABCDEFGHIJKLMNOPQRSTUVWXYZ")