Given the definitions:
(defmulti foo class)
(defmethod foo clojure.lang.IPersistentCollection [_] :a-collection)
(defmethod foo clojure.lang.IPersistentVector [_] :a-vector)
one obtains the following results:
(foo [1 2 3]) -> :a-vector
(foo #{1 2 3}) -> :a-collection
This looks perfectly logical from an OO point of view, but I cannot
find anything in the documentation (http://clojure.org/multimethods)
that actually promises that the vector implementation of foo takes
precedence over the generic collection version if the argument is a
vector. Can I rely on that or should I add
(prefer-method foo clojure.lang.IPersistentVector
clojure.lang.IPersistentCollection)
explicitly?
Konrad.
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