nchapon-4clojure-solution22.clj

;; nchapon's solution to Count a Sequence
;; https://4clojure.com/problem/22

#(loop [coll % acc 0] (if (nil? (first coll)) acc (recur (rest coll) (inc acc))))

nchapon-4clojure-solution134.clj

;; nchapon's solution to A nil key
;; https://4clojure.com/problem/134

#(nil? (%1 %2 "empty"))

john2x

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences