turtuled

turtle.rb

# Turtle shapes

# Not at all necessory, but just to show that you can define attr_accessor from module as well

module AttrLoader
  def attr_loader(*attrs)
    attr_accessor *attrs
  end
end

class Turtle
  extend AttrLoader

  attr_loader :turtle_count, :length, :width

  def initialize(turtle_count, length, width)
    @turtle_count = turtle_count
    @length       = length
    @width        = width
  end

  def fibered
    Fiber.new do
      counter = 1
      loop do
        if counter >= length
          counter = 1
        else
          if counter == 1 || length == counter
            puts @turtle_count.times.collect{'*'*width}.join('    ')
          else
            puts @turtle_count.times.collect{'*' + ' '*(width - 2) + '*'}.join('    ')
          end
          counter += 1
          Fiber.yield
        end
      end
    end
  end

  def shapes
    fiber = fibered
    @length.times{ fiber.resume}
  end
end

Turtle.new(3, 7, 7).shapes

#Produces
#*******    *******    *******
#*     *    *     *    *     *
#*     *    *     *    *     *
#*     *    *     *    *     *
#*     *    *     *    *     *
#*     *    *     *    *     *
#*******    *******    *******