On Dec 1, 2006, at 10:50 AM, Kurt Hindenburg wrote:

> On 12/1/06, Ruby Quiz <james / grayproductions.net> wrote:
>> [Editor's Note:  I added a script to dump your turtle graphics  
>> output to PPM
>> image files, for those that don't have TK up and running.  It  
>> works identically
>> to Morton's turtle_viewer.rb, save that it writes output to a PPM  
>> image file in
>> the current directory.  For example, to output the included tree  
>> image, use
>> `ruby turtle_ppm_writer.rb samples/tree.rb`.  --JEG2]
>>
> Hello,
>  Does the above work for everyone?
>
> (~/turtle_graphics) > ruby turtle_ppm_writer.rb samples/tree.rb
> turtle_ppm_writer.rb:47:in `run_code': undefined method `each' for
> nil:NilClass (NoMethodError)
>        from turtle_ppm_writer.rb:27:in `initialize'
>        from turtle_ppm_writer.rb:75:in `new'
>        from turtle_ppm_writer.rb:75
>
> ruby 1.8.5 (2006-08-25) [powerpc-darwin8]

Making it work is the quiz.  You need to finish the turtle.rb file so  
a track() is returned to draw.

James Edward Gray II