From: micathom <micathom@...>
Date: 2007-05-25T19:25:23+09:00
Subject: Re: Replacement idiom for "list_or_nil.to_a"?

>   list_or_nil.each do |value|
>     ...
>   end

If you really want the extra loop in each just to find out that
nothing has to be done, you could also do:

    (list_or_nil || []).each do |value|
        ...
    end