On Feb 4, 10:11 am, Ken Wesson wrote:
> This does it without using juxt:
>
> (defn supermap [fs & cs]
> (map apply fs (apply map vector cs)))
This is really nice. Even handles infinity properly:
(supermap (repeat +) (range 3) (range 3))
=> (0 2 4)
Thanks Ken and Meikel!
Mike
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On Fri, Feb 4, 2011 at 10:11 AM, Ken Wesson wrote:
> With juxt it's as Meikel wrote:
>
> (defn supermap [fs & cs]
> (apply map (apply juxt fs) cs))
Or not. Hm, juxt documentation needs clarifying.
> (defn supermap [fs & cs]
> (map apply fs (apply map vector cs)))
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On Fri, Feb 4, 2011 at 9:19 AM, Mike wrote:
> This is probably a pretty newb question...sorry. I'm looking for the
> idiomatic way to apply a seq of functions to other seqs. In other
> words, a version of map that doesn't take a single f, but a seq of
> them.
>
> (map f c1 c2 ... cn)
> => ((f c1
Or maybe on a second look:
(map apply fs c1 ... cn)?
(user=> (map #(apply %1 %&) [+ - *] [1 2 3] [1 2 3])
(2 0 9)
vs.
user=> (map (juxt + - *) [1 2 3] [1 2 3])
([2 0 1] [4 0 4] [6 0 9])
Sincerely
Meikel
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Hi,
(map (juxt f1 f2 f3) c1 c2 c3)
(map (apply juxt fs) c1 c2 c3)
(apply map (apply juxt fs) cs)
Sincerely
Meikel
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This is probably a pretty newb question...sorry. I'm looking for the
idiomatic way to apply a seq of functions to other seqs. In other
words, a version of map that doesn't take a single f, but a seq of
them.
(map f c1 c2 ... cn)
=> ((f c11 c21 ... cn1) (f c12 c22 ... cn2) ... (f c1m c2m ... cnm)
