Thank you !
I became crazy because I didn't see the problem in my code.
Why is there this issue with multi-methods? (and not with standard
functions)
Chris
Le 22 nov. 2012 à 02:34, grinnbearit <sidhant.godiw...@gmail.com> a écrit :
Hi Chris,
If you change multimethod arities you'll have to def the multimethod to nil
or restart the swank/nrepl server. It doesn't update that on recompilation.
Sidhant
On Thursday, November 22, 2012 3:44:10 AM UTC+5:30, Christian Sperandio
wrote:
>
> Hi,
>
> I try to define multi-methods but when I call one I get an exception.
>
> I declared the multi-methods like below:
>
> (defmulti new-food-item (fn [food expiration]
> (if (number? expiration)
> ::duration
> ::expiration-date)))
>
> (defmethod new-food-item ::duration [food expiration-duration]
> (let [expiration-date (GregorianCalendar.)]
> (.add expiration-date GregorianCalendar/DAY_OF_MONTH
> expiration-duration)
> {:name food :expiration-date expiration-date}))
>
> (defmethod new-food-item ::expiration-date [food expiration-date]
> {:name food :expiration-date expiration-date})
>
>
> And when I do: (new-food-item "tomatoes" 5)
> I get this exception:
> ArityException Wrong number of args (2) passed to: core$class
> clojure.lang.AFn.throwArity (AFn.java:437)
>
> I don't understand where is the problem :/
>
> Some help?
>
> Thank you.
>
> Chris
>
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