From: "Hal E. Fulton" <hal9000@...>
Date: 2001-07-10T12:19:53+09:00
Subject: [ruby-talk:17587] Re: perfect newbie

----- Original Message -----
From: Serban Udrea <S.Udrea@gsi.de>
To: ruby-talk ML <ruby-talk@ruby-lang.org>
Sent: Monday, July 09, 2001 7:00 PM
Subject: [ruby-talk:17581] perfect newbie


> Hello everybody,
>
> I'm a total newbie to OOP and Ruby. Actually I want to learn how to do OOP
and choose Ruby because I read that it's a nice
> OOP programming language and it's also good for beginners like me.

Freundliche gruessen und willkommen!

If I spelled any of that right...

> I have for the moment a problem with the "class instance variables".
>
> There is the folowing written in the FAQ:
>
> "There is no way to access class instance variables from instance
methods."

Without re-reading the FAQ, I think you are confusing what we normally just
call an "instance variable" with a "class instance variable."

This terminology is less than ideal. In fact, some of Ruby's terminology
breeds confusion sometimes, IMO.

class Foo

  @@var1 = nil

   @ var2 = nil

   def mymeth
      @var3 = nil
   end

end

Here, note that @@var1 is a class variable, @var3 is an instance variable,
and
@var2 is a class instance variable. @var2 does not belong to any instance of
Foo, nor yet to foo itself, but to the class of Foo, which is Class.

Have I said that wrong and embarassed myself?  :)

Hal