pattern-test
12345678
(def strng "clj1317clj1314")
(def integer-pattern (re-pattern "\\d+"))
(println
(re-find integer-pattern strng))
(println
(clojure.string/replace strng integer-pattern "_aha?_"))
(println
(clojure.string/replace-first strng integer-pattern "_aha?_"))
Clojure
INFO