From: Stefano Crocco <stefano.crocco@...>
Date: 2007-12-25T22:26:10+09:00
Subject: Re: Calling Irb from inside an application

Alle marted́ 25 dicembre 2007, Bertram Scharpf ha scritto:
> 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

Not a direct answer to your question, but can't you load the file with the 
definition of the class in irb?

Stefano