From: Kent Dahl <kentda@...>
Date: 2002-12-14T04:11:52+09:00
Subject: Re: require circularity?

James Davis wrote:
> 
> I'm wondering if it is ever necessary to do something like this:
> 
>    unless defined? SomeName then
>       require 'somename'
>    end
> 
> in case source files require each other.  Thanks in advance,

In general, no. Ruby is wa-ah-ay better than C and C++ .

'require' will only load in the file if it hasn't already been loaded. 

However, I think there was some thread a while back on a few
pathological cases where 'require' didn't save the day. One was the case
of reaching the same .rb file from different paths (i.e. require
'somename' versus require '/usr/lib/ruby/somename'). I think there was
one more pathological case, but I can't seem to remember it nor find it
on ruby-talk. But these are pathological, ergo they are only likely show
up when you're getting too clever for your own good. :-)

-- 
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