drop-while.clj

(ns test-app.core)

(def r (range 10))
(def s (set r))
(def v (apply vector r))

;; We can do this because set is seqable, so
;; drop-while can seq it.
(drop-while (partial > 5) s)

;; How do we know something is seqable? No...
[(seq? s) (coll? s) (sequential? s)]

(defn seqable?
  [x]
  (instance? clojure.lang.Seqable x))

;; Yes...
(seqable? s)