Clojure has optional type hints. Ex: (fn [#^String foo] (.length foo)) See http://clojure.org/java_interop#Java%20Interop-Type%20Hints http://clojure.org/java

Clojure has optional type hints. Ex: (fn [#^String foo] (.length foo)) See http://clojure.org/java_interop#Java%20Interop-Type%20Hints http://clojure.org/java_interop#Java%20Interop-Type%20Hints