gistfile1.rbx

class String
  def segments
    segments = split(/\./)
    while segments.size > 1
      yield(segments.join('.'))
      segments.pop
    end
    yield('.')
  end
end


class String
  def segments
    str = dup
    begin
      yield(str)
    end while str.sub!(/\.[^.]+$/, '')
  end
end