Konrad,
I am working on a different proposal on the dev list:
http://groups.google.com/group/clojure-dev/browse_thread/thread/9a518c853bfbba8b#
This is a more in depth version of these functions for maps. I'd love
to have you contribute to the discussion here.
Sean
On Dec 17, 12:16 pm, Konrad Hinsen <konrad.hin...@fastmail.net> wrote:
> On 17 Dec 2009, at 15:44, Sean Devlin wrote:
>
> > 1. I'd call it map-vals (as opposed to map-keys)
>
> > 2. Slight change in the body
>
> > (defn map-vals [f coll]
> > (into {} (map (juxt key (comp f val)) coll))
>
> > There is talk of getting something like this into contrib. Stay
> > tuned :)
>
> There's already clojure.contrib.generic.functor/fmap, which is a
> multimethod whose implementation for maps does just that. Here's the
> code:
>
> (defmethod fmap clojure.lang.IPersistentMap
> [f m]
> (into (empty m) (for [[k v] m] [k (f v)])))
>
> Konrad.
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