fallout hack solver

gistfile1.rb

#!/usr/bin/env ruby
pairs = []
while !(print '> ') && (s = gets.strip) != ''
  word,num = /^(\S+)\s*(\d+)?$/.match(s)[1..2]
  if num
    pairs << [word,num.to_i]
  else
    print(pairs.map { |p_word,p_num|
      p_num == word.chars.zip(p_word.chars).inject(0) { |s,(a,b)| s + (a == b ? 1 : 0) }
    }.all? ? "match\n" : "no match\n")
  end
end