From: William James <w_a_x_man@...>
Date: 2007-12-06T18:20:54+09:00
Subject: Re: Lambda funcs that call gets won't halt program execution?

On Dec 5, 4:30 pm, Peter Bunyan <peter.bun...@gmail.com> wrote:
> Once again, a problem with my Befunge interpreter. I'm trying to
> implement the ~ and & functions - get a character and a number,
> respectively. My & function looks like this:
> instructions["&"] = lambda { print "Number: "; stack.push
> gets().strip.to_i}
>
> But it complains about gets() being nil. as soon as the function is run.
> Well, of course it is. It has let me type. Is there anyway to make it
> halt?

If Ruby is invoked in this fashion
  ruby myprog.rb myfile
then gets reads from the file.
You need
  $stdin.gets