; Several values are returned as one vector and taken apart by destructuring

(defn get-first-last [data]
  (if (seq data)
    [(first data) (last data)]
    [-1 -1]))

(let [[first-item last-item] (get-first-last [2 3 5])]
  ; first-item is 2, last-item is 5
  (println "first =" first-item)
  (println "last =" last-item))