So having parsed your log-history example Jim (which I found tricky because
of the confusion of the problem domain in your example with the
implementation, logging history versus watching changes is a bit close, and
the gratuitous use of the threading macro). I think a simpler example would
be:
(def current-live-cells (atom starting-live-cells))
(defn cells-changed
; called when current-live-cells changes
[k r o n]
(print "cells-changed called."))
(add-watch current-live-cells :log cells-changed)
Not that i'm not grateful for your example, I had to learn about (partial)
-what a useful function!- and the threading macros -yuch!-.
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