Hi,
Am 22.11.2009 um 22:32 schrieb samppi:
(defn vary [coll keys-and-fns]
(let [fn-map (apply arrray-map keys-and-fns)
keys-and-vals (mapcat #((val %) (get coll (key %))) fn-map)]
(apply assoc-args coll keys-and-vals)))
As Jon said: update-in.
(- coll
(update-in [:x] fn-x)
Does a function that does this:
(vary coll :x fn-x, :y fn-y)
; Equivalent to (assoc coll :x (fn-x (:x coll)), :y (fn-y (:y
coll)))
exist in the core or contrib APIs?
I'm surprised that I can't find any. It's a very natural extension of
assoc. But if there really isn't any, is the code below
On Sun, Nov 22, 2009 at 4:32 PM, samppi rbysam...@gmail.com wrote:
Does a function that does this:
(vary coll :x fn-x, :y fn-y)
; Equivalent to (assoc coll :x (fn-x (:x coll)), :y (fn-y (:y
coll)))
exist in the core or contrib APIs?
I'm surprised that I can't find any. It's a very
Ah, update-in is exactly what I need. Excellent, thank you.
On Nov 22, 2:38 pm, John Harrop jharrop...@gmail.com wrote:
On Sun, Nov 22, 2009 at 4:32 PM, samppi rbysam...@gmail.com wrote:
Does a function that does this:
(vary coll :x fn-x, :y fn-y)
; Equivalent to (assoc coll :x (fn-x (:x
