Hi Caleb,
This surprised me as well. It seems that if you try to fold a map, the
function has two arguments:
(r/fold + (r/map (fn [k v] v) {:a 1 :b 2})) ;; works
(r/reduce + (r/map (fn [k v] v) {:a 1 :b 2})) ;; doesn't work
(r/reduce + (r/map (fn [[k v]] v) {:a 1 :b 2})) ;; works
(r/fold + (r/map (fn [[k v]] v) {:a 1 :b 2})) ;; doesn't work
I suspect this is a bug. I'll ask on the clojure-dev mailing list.
- James
On 2 December 2013 16:25, <cloveret...@gmail.com> wrote:
> Hi everyone,
>
> Let d be some map, says {1 3/5, 2 1/5, 3 1/5}
> why
> (reduce + (map #(% 1) d)) => 1
> while
> (fold + (map #(% 1) d)) => ArityException Wrong number of args (2) passed
> to
>
> The reduce,fold, and map are those in the reducers namespace.
>
> Can someone explain to me? Thanks
> -
> Caleb
>
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