pass an ivar name through as an argument to a method?

[Paul Johnson]

Agent has ivars that refer to grids, like "home" and "work".

instead of saying

-setHomeX: (int) x Y: (int) y;
and
-setWorkX: (int) x Y: (int) y;

I want a single method that takes the ivar as an argument.  I want
something like:

-setPositionGrid:  (char *) worldName X: (int) x Y: (int) y; 

But need a hint on how to pass in the ivar name and use it.  OR point me
at an example.

-- 
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ukans.edu/~pauljohn
University of Kansas                  Office: (785) 864-9086
Lawrence, Kansas 66045                FAX: (785) 864-5700

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