I prefer the into version which allows to write a mapmap that preserves the
map type (eg sorted or hash):
(defn mapmap [f m]
(into (empty m) (for [[k v] m] [k (f v)])))
Christophe
On Mon, Mar 23, 2009 at 7:53 AM, Jeff Valk <jv-li...@tx.rr.com> wrote:
>
> On Sun, 22 Mar 2009 at 23:27, Jeff Valk wrote:
>
> > Ah, golf... :-)
> >
> > (defn mapmap [f m]
> > (into {} (for [[k v] m] [k (f v)])))
>
> For the record, I think the original approach is the most clear. And it's
> actually shorter.
>
> (defn mapmap [f m]
> (zipmap (keys m) (map f (vals m))))
>
> >
>
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