Hi,
On 2 Sep., 06:26, HB <[email protected]> wrote:
> How a multimethod in Clojure differs from a method that have multiple
> bodies?
The latter can only dispatch based on the number of arguments and
cannot be extended later on. Compare:
(defmulti foo-multi type)
(defmethod foo-multi String
...)
(defmethod foo-multi Integer
...)
(defmethod foo-multi some.other.Bar
...)
Compare this to:
(defn foo-fn
[x]
(condp #(isa? %2 %1) (type x)
String ...
Integer ...
some.other.Bar ...))
foo-fn cannot be extended after it is defined, while I can still say
later on:
(defmethod foo-multi ::MyType
...)
Hope that helps.
Sincerely
Meikel
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