From: Todd Corenson <todd@...>
Date: 2008-08-24T08:47:37+09:00
Subject: Re: Class_eval vs. reopening class

Todd Corenson wrote:
> I asked a similar question to this in the Rails forum, but it's pretty
> generic to Ruby:
> 
> Is the only difference between these the scoping or is there something
> more?
> 
> ActionController::Base.class_eval do
>   include ActionController::Flash
>   include ActionController::Filters
>   ...
> end
> 
> class ActionController::Base
>   include ActionController::Flash
>   include ActionController::Filters
>   ...
> end

The only other difference I can find is that if the class doesn't 
previouly exist, class_eval on the class will cause an error.
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