Version.rb

Version.rb

class Version
  include(Compareble)
  attr_accessor(:major, :minor, :patch)

  def initialize (version)
    @major, @minor, @patch =
      version.split('.').map(&:to_i)
  end

  def <=> (other)
    return nil unless other.is_a?(Version)

    [major <=> other.major,
     minor <=> other.minor,
     patch <=> other.patch
    ].detect {|n| !n.zero} || 0
  end
end