clojure.core/cycle

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Type: function Added: Clojure 1.0 Examples: 2 Runnable: 2

([coll])

Returns a lazy (infinite!) sequence of repetitions of the items in coll.

Examples

by nipra on 2010-07-15 ▶

(take 5 (cycle ["a" "b"])) ("a" "b" "a" "b" "a") (take 10 (cycle (range 0 3))) (0 1 2 0 1 2 0 1 2 0)

by phreed on 2015-06-12 ▶

;; Typically map works through its set of collections ;; until any one of the collections is consumed. ;; 'cycle' can be used to repeat the shorter collections ;; until the longest collection is consumed. (mapv #(vector %2 %1) (cycle [1 2 3 4]) [:a :b :c :d :e :f :g :h :i :j :k :l]) ;;=> [[:a 1] [:b 2] [:c 3] [:d 4] [:e 1] [:f 2] [:g 3] [:h 4] [:i 1] [:j 2] [:k 3] [:l 4]]

See also

• clojure.core/lazy-seq (6)
• clojure.core/map (13)
• clojure.core/repeat (2)

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