(extend-type array
  ISeqable
  (-seq [array] (array-seq array 0))

  ICounted
  (-count [a] (.-length a))

  IIndexed
  (-nth
    ([array n]
       (if (< n (.-length array)) (aget array n)))
    ([array n not-found]
       (if (< n (.-length array)) (aget array n)
           not-found)))

  ILookup
  (-lookup
    ([array k]
       (aget array k))
    ([array k not-found]
       (-nth array k not-found)))

  IReduce
  (-reduce
    ([array f]
       (ci-reduce array f))
    ([array f start]
       (ci-reduce array f start))))