butlast

function

since v0.0-927

clojure.core/butlast

Edit

Details:

Examples:

(butlast [1 2 3])
;;=> (1 2)

(butlast [1 2])
;;=> (1)

(butlast [1])
;;=> nil

(butlast [])
;;=> nil

See Also:

• first
• rest
• last
• next
• drop-last
• take-last

Return a seq of all but the last item in coll, in linear time

(defn butlast
  [s]
  (loop [ret [] s s]
    (if (next s)
      (recur (conj ret (first s)) (next s))
      (seq ret))))