Word number

word_number.rb

#!/usr/bin/env ruby

def word_number(n, words, separator='-', seed=nil)
  r, n = n.divmod(words.length)
  word = [words[n], seed].compact.join(separator)
  if r < 1
    word
  else
    word_number(r, words, separator, word)
  end
end

words = IO.readlines("/usr/share/dict/words").map(&:strip)
ARGF.each_line do |line|
  puts word_number(line.to_i, words)
end