Hi Jeffrey,
Neman Cells can handle circular dependencies, its just for now I
didn't need such a feature so its not exposed in clear way how to do
it:
(def a (Cell. {:value 5}))
(def b (cell [a] [v] (dec v)))
(add-trigger a
(fn [old-v new-v]
(println (str "Cell a changed from: " old-v " to " new-v))))
(add-trigger b
(fn [old-v new-v]
(println (str "Cell b changed from: " old-v " to " new-v))))
(alter-cell a [b] [v] (if (< v 0) 0 v))
Also, there is nothing like cell-set!, I use them for now only as read-
only values, but if you wish you can set cell's value with:
(assoc (.state cell) :value new-value)
If you need something more deterministic, you could change update-cell
function in first implementation by Stuart so it updates all
dependencies in one dosync block.
--
Krešimir Šojat
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