samppi <rbysam...@gmail.com> writes:

> Is there a more elegant way to phrase this?
>
> (defn- inc-index
>   "Increments the :index val in the givens state's metadata."
>   [state]
>   (vary-meta state assoc :index (inc (:index ^state))))

This is slightly cleaner

(defn- inc-index
  "Increments the :index val in the givens state's metadata."
  [state]
  (vary-meta state update-in [:index] inc))

--
jan

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