22 lines
834 B
Clojure
22 lines
834 B
Clojure
(ns koans.20-partition
|
|
(:require [koan-engine.core :refer :all]))
|
|
|
|
(meditations
|
|
"To split a collection you can use the partition function"
|
|
(= '((0 1) (2 3)) (__ 2 (range 4)))
|
|
|
|
"But watch out if there are not enough elements to form n sequences"
|
|
(= '(__) (partition 3 [:a :b :c :d :e]))
|
|
|
|
"You can use partition-all to also get partitions with less than n elements"
|
|
(= __ (partition-all 3 (range 5)))
|
|
|
|
"If you need to, you can start each sequence with an offset"
|
|
(= '((0 1 2) (5 6 7) (10 11 12)) (partition 3 __ (range 13)))
|
|
|
|
"Consider padding the last sequence with some default values..."
|
|
(= '((0 1 2) (3 4 5) (6 :hello)) (partition 3 3 [__] (range 7)))
|
|
|
|
"... but notice that they will only pad up to the given sequence length"
|
|
(= '((0 1 2) (3 4 5) __) (partition 3 3 [:these :are "my" "words"] (range 7))))
|