From: Simon Strandgaard <neoneye@...>
Date: 2006-08-10T02:44:00+09:00
Subject: Re: Codegolf - Writing a Brainf*ck interpreter

On 8/9/06, Daniel Martin <martin@snowplow.org> wrote:
[snip]
> Still, there's supposedly another way to squeeze an additional 50
> characters out, which I think is going to require some sort of
> fundamental shift in the approach to the problem.

I have just given it a shot.. 146 bytes

prompt> ruby bf.rb
'++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.'
Hello World!
prompt> ruby bf.rb ',[.,]'this program echoes its input
this program echoes its input
only 146 bytes!
only 146 bytes!
^Cbf.rb:3: (eval):5:in `getc':  (Interrupt)
        from (eval):5
prompt> cat bf.rb
eval 'd=[i=0]*8**5'+ARGV[0].gsub(/./){"
"+%w[i+=1 X+=1 i-=1 X-=1 print(X.chr) X=STDIN.getc end
while(X>0)]['>+<-.,]['.index($&)]}.gsub(/X/,'d[i]')
prompt>

--
Simon Strandgaard