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(require '[clojure.string :as str]) | |
;; In this use case, a valid expression won't have an even number of lexemes | |
(defn valid-length? [lexemes] | |
(odd? (count lexemes))) | |
(defn valid-paren-count? [lexemes] | |
(let [opens (filter #(= "(" %) lexemes) | |
closes (filter #(= ")" %) lexemes)] | |
(= (count opens) (count closes)))) |