[Cuis-dev] indexable objects

[Mark Volkmann]

The at:put: method in the object class contains the comment "Assumes
receiver is indexable.".
What does a class need to do to indicate that it is indexable? I searched
the Array class and all its superclasses, but the answer wasn't apparent to
me.

I'm reading the blue book now. On page 48 it says "its variable declaration
will include the line index instance variables". I'm assuming that's the
way it worked in Smalltalk-80, but it works differently in Cuis Smalltalk.

-- 
R. Mark Volkmann
Object Computing, Inc.
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