From: Bertram Scharpf <lists@...>
Date: 2007-12-25T22:08:41+09:00
Subject: Calling Irb from inside an application


Hi,


this may be easy to anwer but it is difficult to google for.

While developping I would like to play around with objects from
time to time. Just like this:

    irb(main):001:0> class C ; def f ; "F" ; end ; end
    => nil
    irb(main):002:0> irb C.new
    irb#1(#<C:0xb7910d40>):001:0> f
    => "F"
    irb#1(#<C:0xb7910d40>):002:0> 

In common my classes are not so easy to type in. So, I would like
to call Irb from somewhere inside the application as I do here:

    ---->-call_irb.rb---------------
    #!/usr/bin/ruby

    class C
      def f
        "F"
      end
    end

    if $0 == __FILE__ then
      require "irb"
      $c = C.new
      IRB.start
    end
    ----<---------------------------

and then

    user@host $ ./call_irb.rb
    irb(main):001:0> irb $c
    irb#1(#<C:0xb7be4ee0>):001:0> f
    => "F"
    irb#1(#<C:0xb7be4ee0>):002:0>

Is there a way how I can call C.new's Irb directly without doing
the long-winded definition of a global variable first? I already
examined the irb sources but this seems to be well-hidden to me.

Thanks in advance and Merry Christmas,

Bertram


-- 
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de