Almost the same as Hamming_improved_2.rb

Hamming_improved.rb

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