Functions (methods as you call them) can have several bodies depending
on the number of arguments, for example:
(defn stupid-max
([a] a)
([a b] (if (> a b) a b))
([a b c] (stupid-max (stupid-max a b) c)))
Mutlimethods decided which function to call depending on the value of
a dispatch function. For example:(defmulti make-noise :type)
(defmethod make-noise :dog [obj]
(println "whoof whoof"))
(defmethod make-noise :cat [obj]
(println "miao"))
(defmethod make-noise :duck [obj]
(println "quack quack"))
(make-noise {:type :duck :name "duffy"})
You can read more about multimethods
http://en.wikibooks.org/wiki/Clojure_Programming/Examples/API_Examples/Multimethod
HTH,
--
Miki
On Sep 1, 9:26 pm, HB <hubaghd...@gmail.com> wrote:
> Hey,
> How a multimethod in Clojure differs from a method that have multiple
> bodies?
> When to use each approach?
> Thanks.
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