clojure.core/nthrest

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Type: function Added: Clojure 1.3 Examples: 4 Runnable: 4

([coll n])

Returns the nth rest of coll, coll when n is 0.

Examples

by jmglov on 2012-06-04 ▶

(nthrest (range 10) 5) ;;=> (5 6 7 8 9) ;; in many cases gives the same result as nthnext (nthnext (range 10) 5) ;;=> (5 6 7 8 9) ;; here is a case where the results differ (nthrest [] 3) ;;=> [] (nthnext [] 3) ;;=> nil (nthrest [1 2 3 4 5 6 7] 4) ;;=> (5 6 7)

by phreed on 2015-01-08 ▶

;; drop is also similar, but lazy (nthrest (range 10) 5) ;;=> (5 6 7 8 9) (drop 5 (range 10)) ;;=> (5 6 7 8 9) ;; here is a case where the results differ (nthrest [] 3) ;;=> [] (drop 3 []) ;;=> () ; returning a lazy sequence

by reborg on 2018-03-19 ▶

;; nthrest eagerly evaluates the dropped items: (def a (nthrest (map #(do (print ".") %) (iterate inc 0)) 10)) ;; ..........#'user/a (note: processing already started) (def b (drop 10 (map #(do (print ".") %) (iterate inc 0)))) ;; #'user/b (note: no evaluation) ;; Possible use: always produce side effects (if any) independently ;; from evaluation of kept items.

by jimka2001 on 2022-08-26 ▶

;; nthrest returns a suffix of the given sequence

Note by TimMc

This differs from clojure.core/drop in that it immediately drops the head of the seq, instead of doing so on the first call to first or seq.

See also

• clojure.core/drop (2)
• clojure.core/nthnext (2)
• clojure.core/nth (1)
• clojure.core/rest (6)
• clojure.core/next (2)

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