From: Nikolai Weibull <now@...>
Date: 2012-03-22T04:17:02+09:00
Subject: Re: What’s the best way to check if a feature/class has been loaded?

On Wed, Mar 21, 2012 at 16:43, Xavier Noria <fxn@hashref.com> wrote:
> Ah, that won't work in 1.8.
>
> In 1.8 you can rely on the fact that const_defined? does not look into the
> ancestors. I guess a portable solution will need to have code that depends
> on the Ruby version.

Or simply use my #feature? implementation.  But again, I would like to
use something that I don’t have to copy&paste or require into every
project where I need this function.  Relying on ActiveSupport is
definitely not an option.