From: Michael Neumann <mneumann@...>
Date: 2004-12-07T22:07:07+09:00
Subject: Re: Ruby 2.0

Gavin Sinclair wrote:
> On Tuesday, December 7, 2004, 12:15:42 AM, Michael wrote:
> 
> 
>>Gavin Sinclair wrote:
>>
>>>On Monday, December 6, 2004, 10:43:50 PM, Michael wrote:
>>>
>>>
>>>
>>>>ruby -rcomplex
>>>>-e'c,m,w,h=Complex(-0.75,0.136),50,200,100;puts"P6\n"+\
>>>>"#{w}
>>>>#{h}\n255";(0...h).each{|j|(0...w).each{|i|n,z=0,Complex(0.9*i/w,\
>>>>0.9*j/h);while n<=m&&(z-c).abs<=2;z=z*z+c;n+=1 end;print [20+n*10,0,\
>>>>rand*99].pack("C*")}}'|display
>>>
>>>
>>>Running that on Cygwin, I get
>>>
>>>display: unable to open X server `'.
>>>-e:4:in `write': Broken pipe (Errno::EPIPE)
>>>        from -e:4:in `print'
>>>        from -e:4
>>>        from -e:2:in `each'
>>>        from -e:2
>>>        from -e:2:in `each'
>>>        from -e:2
>>>
>>>Probably a platform issue, but I gotta say I'm a bit surprised.
> 
> 
>>Probably due to 'display'. The ruby code generates a .pnm image, which
>>is then displayed using 'display' (ImageMagick).
> 
> 
> But the code doesn't require rmagick, does it?

no it doesn't require rmagick. it generates the pnm image itself (and 
this in 4 lines ;-).

The "display" command is there only to view the pnm image, oterhwise it 
would print the image on STDOUT.

Regards,

   Michael