From: "Hal E. Fulton" <hal9000@...>
Date: 2003-01-21T08:27:45+09:00
Subject: Re: Local variable scope

----- Original Message ----- 
From: "Phil Tomson" <ptkwt@shell1.aracnet.com>
Newsgroups: comp.lang.ruby
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Monday, January 20, 2003 3:54 PM
Subject: Re: Local variable scope


> >You can do this in 1.7:
> >
> >module M
> >   foo = "bar"
> >   define_method :function do
> >     puts foo
> >   end
> >end
> >include M
> >
> >function      # prints: bar
> 
> This falls into the catagory of 
> one-of-those-1.8-features-I-didn't-know-about.
> 
> So define_method can define a method that 'knows' about all of the 
> variables in the scope in which it is defined?  Useful, but one needs to 
> be careful.

Correct me if I'm wrong, but isn't this simply
because the do/end block itself is able to "see"
the variable foo? 

The body of an ordinary method, i.e., def/end,
looks similar to a do/end block but isn't one.

This starts my mind speculating about the two
converging into one thing... but that would
likely raise more issues than it resolves. And
I certainly am not in the mood to think it
through. :)

Hal