From: ts <decoux@...>
Date: 2001-12-12T01:41:34+09:00
Subject: [ruby-talk:28240] Re: Class vars overridden in subclasses?

>>>>> "h" == herman graal <herman_graal@europe.com> writes:

h> However, I can't understand why the super class is affected in the code
h> below: 

 Well, 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