create-population.clj

(defn create-population [gen-size genome-size]
  "creates a random population of size gen-size,
   with each genome of size genome-size"
  (map (fn [x] (vec (unique-random-numbers genome-size)))
       (range gen-size)))

;; from https://clojuredocs.org/clojure.core/rand-int
(defn unique-random-numbers [n]
  "Generates a list of unique random ints between 0 and n"
  (let [a-set (set (take n (repeatedly #(rand-int n))))]
    (concat a-set (clojure.set/difference (set (take n (range)))
                                  a-set))))