On Wed, 30 Mar 2011 10:21:41 -0700 (PDT)
Jeff Rose <[email protected]> wrote:
> Hola,
> I'm looking for a function that updates a map value by calling a
> function on it.
>
> (def foo {:a 1})
>
> So instead of this:
> (assoc foo :a (inc (:a foo))) ; => {:a 2}
>
> Something like this:
> (map-fn foo :a inc) ; => {:a 2}
>
> Does that exist somewhere, or should I be doing this in a different
> way? If not, shouldn't it be included?
Possibly you want update-in:
(update-in foo [:a] inc) ; -> {:a 2}
I'm not sure why there's not an "update" that replaces the list of
keys with a single key.
<mike
--
Mike Meyer <[email protected]> http://www.mired.org/consulting.html
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