Execute Brain****/Ruby: Difference between revisions
m
Fixed syntax highlighting.
(improvement of the debugging output, each_with_index->with_index) |
m (Fixed syntax highlighting.) |
||
| (One intermediate revision by one other user not shown) | |||
Line 1:
{{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.
<
def initialize(program)
@d = [0] * 30_000
Line 75 ⟶ 76:
# use nested loop to increment count to 64 and print (should be '@')
# followed by a newline
RCBF.new('>>++++[<++++[<++++>-]>-]<<.[-]++++++++++.').run</
{{out}}
<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.
<syntaxhighlight 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;')</syntaxhighlight>
| |||