xixixao

#(defn parting
#  "returns a String parting in a given language"
#  ([] (parting "World"))
#  ([name] (parting name "en"))
#  ([name language]
#    (condp = language
#      "en" (str "Goodbye, " name)
#      "es" (str "Adios, " name)
#      (throw (IllegalArgumentException.
#        (str "unsupported language " language))))))