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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Monads-Maybe-monad/Clojure/monads-maybe-monad.clj Normal file
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(defn bind [val f]
(if-let [v (:value val)] (f v) val))
(defn unit [val] {:value val})
(defn opt_add_3 [n] (unit (+ 3 n))) ; takes a number and returns a Maybe number
(defn opt_str [n] (unit (str n))) ; takes a number and returns a Maybe string
(bind (unit 4) opt_add_3) ; evaluates to {:value 7}
(bind (unit nil) opt_add_3) ; evaluates to {:value nil}
(bind (bind (unit 8) opt_add_3) opt_str) ; evaluates to {:value "11"}
(bind (bind (unit nil) opt_add_3) opt_str) ; evaluates to {:value nil}