Excellent! I must remember about the apply function. Thank you very
much.
On Nov 14, 9:35 pm, "Kevin Downey" <[EMAIL PROTECTED]> wrote:
> On Fri, Nov 14, 2008 at 8:33 PM, Kevin Downey <[EMAIL PROTECTED]> wrote:
> > On Fri, Nov 14, 2008 at 8:17 PM, samppi <[EMAIL PROTECTED]> wrote:
>
> >> Yeah, I need to be able to do this to easily manage trees of maps. I
> >> meant, how would you idiomatically implement their algorithms?
>
> >> Fold isn't build into Clojure, but they should still somehow be
> >> possible...right?
>
> >> On Nov 14, 9:12 pm, Michel Salim <[EMAIL PROTECTED]> wrote:
> >>> On Nov 14, 10:56 pm, samppi <[EMAIL PROTECTED]> wrote:> I'm trying to
> >>> figure out how to do this:
>
> >>> > (flat-map-seq {:a 3, :b 1, :c 2}) ; returns (:a 3 :b 1 :c 2)
>
> >>> (defn flat-map-seq [m]
> >>> (if (empty? m) '()
> >>> (let [kv (first m)]
> >>> (lazy-cons (kv 0) (lazy-cons (kv 1) (flat-map-seq (rest m)))))))>
> >>> ...and vice versa:
>
> >>> > (map-from-flat-collection {} [:a 3 :b 1 :c 2]) ; returns {:a 3, :b
> >>> > 1, :c 2}
>
> >>> (defn map-from-flat-collection [c]
> >>> (if (empty? c) {}
> >>> (conj (map-from-flat-collection (rrest c)) [(first c) (frest
> >>> c)])))
>
> >>> > Anyone have any idiomatic ideas?
>
> >>> Well, not sure how idiomatic this is; apart from conj, this is how
> >>> you'd do it in Lisp/Scheme. I'd use fold to do the first function if
> >>> it's built into Clojure.
>
> >>> Regards,
>
> >>> --
> >>> Michel
>
> > (apply assoc {} [:a 1 :b 2 :c 3])
> > -> {:c 3, :b 2, :a 1}
> > --
> > The Mafia way is that we pursue larger goals under the guise of
> > personal relationships.
> > Fisheye
>
> user=> (apply concat (seq {:c 3, :b 2, :a 1}))
> (:c 3 :b 2 :a 1)
> user=>
>
> --
> The Mafia way is that we pursue larger goals under the guise of
> personal relationships.
> Fisheye
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To post to this group, send email to clojure@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
-~----------~----~----~----~------~----~------~--~---
