In article <Pine.LNX.4.64.0804231018230.3590 / rubypal.com>,
  "David A. Black" <dblack / rubypal.com> writes:

> My view is that if it weren't already there, it would never occur to
> anyone to put it in at this point. Of course, it *is* already there,
> but I think it would be well worth taking it out. In my 7.5 years of
> Ruby programming I've never seen it demonstrate any usefulness at all.

There is (only) one example which I feel "::" is suitable than ".":
Net::HTTP::Proxy().
-- 
Tanaka Akira