From: dblack@...
Date: 2007-05-11T07:11:30+09:00
Subject: Re: self in blocks

Hi --

On Fri, 11 May 2007, Vasco Andrade e silva wrote:

> MenTaLguY wrote:
>> self will normally refer to self in the lexical scope of the block (#2).
>> class_eval, module_eval, instance_eval, and instance_exec are special
>> exceptions to this rule.
>>
>> -mental
>
> I confess I don't like this approach :S (rules with exceptions, doesn't
> fit right..) however thanks for the explanations.
> By the way are class_eval, module_eval, instance_eval and instance_exec
> the only exceptions?

I think so.  (I can't remember what instance_exec does/will do, but
that's neither here nor there.)  It's not really rule plus exception;
it's more a kind of hand-crafted quality to the language that provides
a nice assortment of the facilities that people actually need, with
attention paid to the naming.  It's another example of why I have
always said that Ruby represents "the triumph of balance over
symmetry" :-)


David

-- 
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A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
    (See what readers are saying!  http://www.rubypal.com/r4rrevs.pdf)
Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
A. Ruby Power and Light, LLC (http://www.rubypal.com)