From: Chris Pine <nemo@...>
Date: 2002-12-07T13:05:53+09:00
Subject: Re: StringIO (was: Namespaces (was: protected program in a program))

<grumble>...replying to my own post...</grumble>

----- Original Message -----
Now I just need to figure out how to grab the input *as it's being grabbed*
so I can echo it to the output...
----------------------------

Nevermind.  It was pretty easy:

  def executeCode (code, input)
    code = "begin\n" +
            code +
           "\nrescue Exception => error\n" +
           "puts error.inspect\n" +
           "end\n"

    strIO = StringIO.new
    if !input.empty?
      input = input.join("\n")+"\n"
      input = StringIO.new (input, "r")
      class << strIO; self; end.class_eval do
        %w[gets getc read].each do |f|
          define_method(f) do
            inStr = input.method(f).call
            puts '<'+inStr+'>'
            inStr
          end
        end
      end
    end
    strIO.instance_eval code
    strIO.string
  end

It's just that I don't know anything about define_method or StringIO, so I
feel lost...  also, I didn't know you could associate Method objects to a
method call just like Proc objects... could you always do that?  It makes
sense...

Chris