[squeak-dev] Class variables
Wolfgang Eder
edw at generalmagic.at
Mon Jul 14 14:39:36 UTC 2008
Martin Beck wrote:
> Hi list,
>
> can anyone please explain the difference between class variables at the
> instance side in the class browser and instance variables at the class
> side (thus of the metaclass) to me? And which of them is the preferred one?
>
> Regards,
> Martin
>
>
hi martin,
it makes a difference if you consider subclasses:
a class variable is there only once, like a global
variable, and accessable to the class and all its subclasses.
a class instance variable is there for the class and
each of its subclasses, and can have a different value
for each subclass.
i hope that makes sense
cheers,
wolfgang
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