On May 27, 2007, at 17:14 , subbukk wrote:
Since classes are also objects
that are created when you 'accept' the definition (except that its
variables
are created from classVariableNames), so you can use them in class
methods
immediately.
Not quite. Those variables are "class variables", which are global
variables (global to the class and subclasses and all their
instances). Their names start with a capital letter like every global
variable in Smalltalk.
Like Bert explained in an earlier mail, use of classVariables is
very rare.
There is a difference between "class variables" (which are like
"static" variables in other systems, so they get their fare share of
use) and "class instance variables" (very rarely used indeed). You
see "class instance variables" only when you switch the browser to
the class side. "Class instance variables" have a different value in
each subclass and are private to the class-side. Hence they are not
global and have lower-case names.
- Bert -
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