.cljs

(defn api-call-with-cb [api-call cb]
  (go (let [resp (<! (api-call))]
        (if (= 200 (:status resp))
          [(:body resp) nil]
          [nil resp]))))

(defn api-fetch 
  ([api-call cb] (api-call-with-cb api-call cb))
  ([api-call] (api-call-without-cb api-call)))

(defn make-callback [item]
  (fn [aux]
    (prn "Item in this fn" item)
    (reset! rez aux)))

(go
  (prn "Items " @items) ;; prints items collection with data in it
  (doseq [item @items]
    (prn "this is t " item) ;; prints a map (one item of @items collection)
    (<! (api-fetch #(get-stuff (:_id item)) ;; chrome dev tools show the request made with :_id param read correctly
                   (make-callback item)))))