See en.wikipedia.org/wiki/Brainfuck

rbfk.rb <brainfuck source file>

OR

echo '++++++[>++++++++++<-]+++++.' | rbfk.rb

although piping in a script this way that uses the “,” operation won’t work, since the “,” operation reads from STDIN.

Also supports Ook! and Spoon scripts.

You can use the BrainFuck class in your own programs (why?) like so:

require 'brain_fuck'

program = File.open('test.bf', 'r')
#
# OR any IO stream, e.g.
# require 'stringio'
# program = StringIO.new('++++++[>++++++++++<-]>+++++.')
#
bf = BrainFuck.new(program)
bf.run

options = { :memory_size => 50_000 }
bf = BrainFuck.new(program, options)
bf.run

Where options is a hash with one or more of the following options:

:debug

will emit debugging information to STDOUT

:execution_limit

the maximum operations to execute (including repetition in loops) before forced termination (to prevent runaway scripts). Defaults to 1,000,000.

:memory_size

the size of the “tape” (the array) size used for the BrainFuck machine’s memory. Defaults to 30,000.

:input_stream

the IO stream from which the “,” operation reads

:output_stream

the IO stream to which the “.” operation will write