Clojure closure

Question

the other day I was trying to come up with an example of closure in Clojure. I came up with and example I had seen before and thought it was appropriate.

Alas, I was tol

Answer 1

Another example of closure. There are two functions that share the same environment (state).

(defn create-object [init-state]
  (let [state (atom init-state)]
    {:getter (fn []
               @state)
     :setter (fn [new-val]
               (reset! state new-val))}))

(defn test-it []
  (let [{:keys [setter getter]} (create-object :init-value)]
    (println (getter))
    (setter :new-value)
    (println (getter))))

(test-it)
=> :init-value
   :new-value