if you are thinking of the nested map as a sort of tree - which you seem to
be doing - then map-leaves or something similar might convey the intent.
On Saturday, 27 July 2013 04:30:30 UTC+10, Jay Fields wrote:
>
> I'm not sure I'd call this more readable, but it's another option - using
> clojure.walk
>
> (defn deep-update-vals
> [m f & args]
> (let [f (fn [[k v]] (if (map? v) [k v] [k (apply f v args)]))]
> (clojure.walk/postwalk (fn [x] (if (map? x) (into {} (map f x)) x))
> m)))
>
>
> On Fri, Jul 26, 2013 at 2:06 PM, Jay Fields <[email protected]<javascript:>
> > wrote:
>
>> I defined update-vals in jry:
>> https://github.com/jaycfields/jry/blob/master/src/clojure/jry.clj#L74-L75
>>
>> It doesn't traverse nested maps, but I haven't ever needed that ability
>> either.
>>
>> 1) I've never seen a name for that.
>> 2) not in core. I'm sure it's been written 50 times in various helper
>> libs.
>> 3) I'd probably write it like below, but I'm not convinced it's any
>> better.
>>
>> (defn deep-update-vals
>> [m f & args]
>> (if (map? m)
>> (reduce-kv #(assoc %1 %2 (apply deep-update-vals %3 f args)) {} m)
>> (apply f m args)))
>>
>>
>> On Fri, Jul 26, 2013 at 1:31 PM, Yoshinori Kohyama
>> <[email protected]<javascript:>
>> > wrote:
>>
>>> Thank you Gary.
>>> There's no reason why this need to be a macro.
>>> It has rewritten as a function.
>>>
>>> And I'd still like to hear any response about the same three questions.
>>>
>>>
>>>
>>> (require '[clojure.test :refer (with-test is run-tests)])
>>>
>>>
>>>
>>> (with-test
>>> (defn mapf [f m & args]
>>>
>>>
>>> ((fn g [n]
>>> (if (map? n)
>>>
>>>
>>> (into {} (map (fn [[k v]] [k (g v)]) n))
>>>
>>>
>>> (apply 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})))
>>>
>>>
>>>
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>>>
>>
>>
>
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