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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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15
Task/Monty-Hall-problem/Clojure/monty-hall-problem-1.clj Normal file
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(ns monty-hall-problem
(:use [clojure.contrib.seq :only (shuffle)]))
(defn play-game [staying]
(let [doors (shuffle [:goat :goat :car])
choice (rand-int 3)
[a b] (filter #(not= choice %) (range 3))
alternative (if (= :goat (nth doors a)) b a)]
(= :car (nth doors (if staying choice alternative)))))
(defn simulate [staying times]
(let [wins (reduce (fn [counter _] (if (play-game staying) (inc counter) counter))
0
(range times))]
(str "wins " wins " times out of " times)))

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Task/Monty-Hall-problem/Clojure/monty-hall-problem-2.clj Normal file
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monty-hall-problem> (println "staying:" (simulate true 1000))
staying: wins 337 times out of 1000
nil
monty-hall-problem> (println "switching:" (simulate false 1000))
switching: wins 638 times out of 1000
nil