From: Daniel Amelang <daniel.amelang@...>
Date: 2006-01-17T07:52:48+09:00
Subject: Re: const_defined? behavior

Hi Nobu,

> defined?(IO::SYNC)

In my case, the constant's name is stored in a variable. So, I'd have
to resort to doing an 'eval' if I were to follow your suggestion. So
at least I have two options now:

# Option 1 (Nobu's suggestion)
found = eval("defined?(obj::#{const})")

# Option 2 (My original idea)
found = obj.respond_to?(:constants) && obj.constants.member?(const)

Any better ideas? I usually try to stay clear of 'eval' if I can.

Dan Amelang