On 2012-09-27 04:47:04 +0000, James Cameron said:

> The only thing I don't quite understand is how sp_table is used
> without triggering an error "UnboundLocalError: local variable
> 'sp_table' referenced before assignment", but it works.

Similar issue in obj-c and the logical you presented here.

Conceptually I understand what's going on but implementation in obj-c 
is something I'm struggling with.  Protocols, composites, containers, 
inheritance, no abstract classes, lots of learning.

Bob Tanner <basic at us.netrek.org>          
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