From: ts <decoux@...>
Date: 2001-09-03T23:05:57+09:00
Subject: [ruby-talk:20777] Re: Dynamic generation of class variables?

>>>>> "R" == Renald Buter <buter@CWTS.LeidenUniv.nl> writes:

R> One thing though: I thought class variables are supposed to be denoted
R> prefixed by '@@' -- or is that just syntactic sugar?

 No, no

 You must distinguish "class variables" and "class instance variables"

 class variable (@@var) : the local class and all its subclasses refer to
that one variable, class variable is a shared variable

 Class variables allow common sharing of information across a range of
subclasses. 

 class instance variable (@var) : class instance variable is private to the
 class, like instance variable is private to an object.


Guy Decoux