ruby.rb

class Hamming
	def self.compute(ancestor, descendant)
		hamming = 0
		if ancestor == descendant
			0
		end

		elsif ancestor != descendant or ancestor == 0
			raise ArgumentError, "Strings were of unequal length or empty"
		end
		else
			ancestor.each do |amino_a|
				descendant.each do |amino_b|
					if amino_a != amino_b
						hamming++
					end
				end
			end
		end
		hamming
	end
end