From: Sean O'Halpin <sean.ohalpin@...>
Date: 2008-06-29T20:40:32+09:00
Subject: Re: question about defined? and y

On Thu, Jun 26, 2008 at 6:48 PM, Ruby Freak <twscannell@gmail.com> wrote:
> The defined? keyword seems to have some funky behaviors.
> I have decided that the best way to use it is to compare the output to
> nil as it returns a myriad of results that all result in truth.
>
> puts (defined?(x) == nil ? "Not defined" : "Is defined")
>
> but...
> What's up with y?
>
> The uninitialized variable y returns from defined? as "method" rather
> than "nil" ????
>
> puts defined?(x) # => nil
>
> puts defined?(y) # => method
>

$ ruby -e "puts defined?(y); require 'yaml'; puts defined?(y)"
nil
method

Regards,
Sean