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Execute Brain****/Ruby: Difference between revisions
I'm liking Ruby; concise AND tidy
(improvement of the debugging output, each_with_index->with_index) |
(I'm liking Ruby; concise AND tidy) |
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{{implementation|Brainf***}}{{collection|RCBF}}
==Version 1==
An implementation of a [[Brainf***]] interpreter in [[Ruby]].
More effort could be made to read a program from a file or from stdin.
Line 80 ⟶ 81:
<pre>Hello World!
@</pre>
==Version 2==
This variant converts the brainfuck into Ruby code and runs that instead.
Do note that this requires Ruby1.9.1 or later, earlier versions need a somewhat more verbose variant.
BF code may be read from a file or taken from STDIN.
<lang ruby>eval 'm=Hash.new(p=0);'+ARGF.read.gsub(
/./,
'>' => 'p+=1;',
'<' => 'p-=1;',
'+' => 'm[p]+=1;',
'-' => 'm[p]-=1;',
'[' => '(;',
']' => ')while((m[p]&=255)!=0);',
'.' => 'putc(m[p]&=255);',
',' => 'm[p]=STDIN.getc.ord if !STDIN.eof;')
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