clojure multi-method dyn dispatch example

multi-dyn-dispatch.clj

(defmulti my-multi (fn [arg]
                     (if (.startsWith arg "a")
                       :a
                       :b)))

(defmethod my-multi :a [arg]
  (format "this is :a gonka-donk: %s" arg))

(defmethod my-multi :b [arg]
  (format "b is the b is the b damn it: %s" arg))

(my-multi "foo")     ;; => "b is the b is the b damn it: foo"
(my-multi "akerman") ;; => "this is :a gonka-donk: akerman"