From: Joel VanderWerf <vjoel@...>
Date: 2008-05-18T05:48:33+09:00
Subject: Re: Pulling a class from a ruby file

Avdi Grimm wrote:
> On Fri, May 16, 2008 at 12:30 PM, Abhishek Ray <hey_a_ray@hotmail.com> wrote:
>> Is there any way in Ruby to load only a single class from another file.
> 
> No.
> 
> If you only want the external code the be executed when the file is
> run as an executable, and not when it is loaded by another file, you
> can enclose that code in a conditional, thus:
> 
>   if $0 == __FILE__
>     # ... code to execute when run as an executable ...
>   end

or put the external code inside of some specialized construct:

def external
   yield unless $testing
end

external do
   class C
   end

   def foo
   end
end

C
foo

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407