An improved implementation of the Hamming distance

Hamming_improved_2.rb

class Hamming
  def self.compute(s1,s2)
    distance = 0
    raise ArgumentError if s1.length != s2.length
    s1.chars.zip(s2.chars) {|s1char, s2char| distance += 1 unless s1char == s2char}
    distance
    end
  end
end