From: suresh <suresh.amritapuri@...>
Date: 2008-06-12T01:34:42+09:00
Subject: Re: how to avoid multiple inclusion of a file

On Jun 11, 9:28 pm, Jason Roelofs <jameskil...@gmail.com> wrote:
> As long as the require lines are exactly the same, there's nothing to
> worry about.
>
> file1.rb:
> require 'lib'
>
> file2.rb:
> require 'lib'
>
> This will work fine. You will run into problems if you put relative
> paths though:
>
> file1.rb:
> require 'lib'
>
> lower/file3.rb:
> require '../lib'
>
> This will end up require-ing lib.rb twice, and possibly cause problems.
>
> Either use full paths, or add directories to the $LOAD_PATH to protect
> against this.
>
> Jason
>
> On Wed, Jun 11, 2008 at 12:24 PM, suresh <suresh.amritap...@gmail.com> wrote:
> > Hi
>
> > My program is split up into multiple files, each containing a set of
> > related class definitions. In the main file, all these files are
> > included by using require. But how can i avoid multiple inclusion of a
> > file by mistake.
>
> > Is there anything similar to C languages #ifndef .......
>
> > thanks
> > suresh

Hi Jason,

Will tell you what happened to me. I had some database populating code
in some import class definitions. By mistake that file got included
twice and I had to spend a lot of time to figure out how this
happened. So thats why my question, how can I avoid multiple inclusion
of files.

suresh