In the ant simulation the world function looks like this
(def world
(apply vector
(map (fn [_]
(apply vector (map (fn [_] (ref (struct cell 0 0)))
(range dim))))
(range dim))))
I'm not sure why the calls to '(apply vector' are required. I have two
theories:
* It is to work round the lazy nature of map and force the creation of
all of the refs. If this is the case, can anyone enlighten me as to
why this might be necessary?
* It is a performance optimisation to make lookups of faster later.
A third theory is that neither of the above theories is correct.
Can anyone provide me with some insight?
Thanks,
Rob Lally.
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