From: yermej <yermej@...>
Date: 2007-11-21T00:00:01+09:00
Subject: Re: require functionality

On Nov 20, 5:36 am, Junkone <junko...@gmail.com> wrote:
> hello
> can i verify if a library is loaded before doing a require 'library'.
> if so how.
> thanks in advance

By "if a library is loaded", do you mean if a library exists on the
system?

If that's what you're looking for, it's probably easiest to wrap the
require in a begin/rescue/end, catch the LoadError which is raised if
the library doesn't exist, and then do what needs to be done.

begin
  require "optional_library"
rescue LoadError
  puts "couldn't find optional_library, continuing without it"
end