Why does this need to be a macro? It doesn't actually manipulate code.
Just turn this: (~f n# ~@args) into (apply f n args) in the function
implementation.
On Fri, Jul 26, 2013 at 11:49 AM, Yoshinori Kohyama <yykohy...@gmail.com>wrote:
> Hello group.
>
> I wrote a tiny macro to apply a function to values in lowest levels in a map
> with arguments.
> Three questions:
>
> - Does this abstraction have any existing name?
> - Is there any existing function/macro to do similar things?
> - Would anyone improve this implementation?
>
>
> (require '[clojure.test :refer (with-test is are run-tests)])
>
> (with-test
> (defmacro mapf [f m & args]
> `((fn f# [n#]
> (if (map? n#)
> (into {} (map (fn [[k# v#]] [k# (f# v#)]) n#))
> (~f n# ~@args)))
> ~m))
>
> (is (= (mapf #(* % %) {:a {:b 3 :c 4} :d 5})
> {:a {:b 9 :c 16} :d 25}))
> (is (= (mapf #(+ (* %1 %1) %2) {:a {:b 3 :c 4} :d 5} 1)
> {:a {:b 10 :c 17} :d 26})))
>
> https://gist.github.com/kohyama/6089899
>
> Thank you in advance.
>
> Y.Kohyama
>
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