On Jan 6, 12:56 pm, Jozef Wagner <jozef.wag...@gmail.com> wrote:
> Thank you,
>
> But the things are more complicated. In my case, I need to update the atom
> with the result of a (native) function which unfortunately also performs
> some side effects and cannot be split in two.
>
> Updated example:
>
> (def state {:result nil :input [1 2 3]})
>
> (defn update-item!
> [item]
> (if (:result item) ; if already processed, do nothing
> item
> (let [result (side-effect-fn! (:input item))]
> (assoc item :result result))))
>
> (swap! state update-item!) ;; same problem
Not doable with atoms if you have a side-effecty thing that you can't
separate out. You'll have to use something lower-level like Java
synchronization or locks.
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