LiddleLizzard - a digital organism

liddle_lizzard.rb

class LiddleLizzard

  CHROMOSOME_LENGTH = 500

  include Comparable

  attr_accessor :chromosome

  def initialize
    @chromosome = BitString.new(CHROMOSOME_LENGTH).bit_string
  end

  def <=>(other)
    self.fitness <=> other.fitness
  end

  # calculates the "fitness" of this chromosome
  def fitness
    score = 0
    chromosome.scan(/1*/).each do |str|
      score = str.length if str.length > score
    end
    score
  end

  # mutates this chromosome
  def mutate
    chromosome[rand(500)-1] = '1'
  end
end