Standard version or idiomatic use of (fn [f & args] (apply f args))

Question

Every so often I find myself wanting to apply a collection of functions on several collections of parameters. It\'s easy to do with map and a very simple function.

Answer 1

Another approach which is fairly self explanatory: "for each nth function, apply it to all nth elements of the vectors":

(defn my-juxt [fun-vec & val-vecs]
  (for [n (range 0 (count fun-vec))]
    (apply (fun-vec n) (map #(nth % n) val-vecs))))

user> (my-juxt [- + *] [1 2 3] [1 2 3] [1 2 3])
(-1 6 27)

Answer 2

I can't right now thing of a clojure.core function that you could plug into your map and have it do what you want. So, I'd say, just use your own version.

Matt is probably right that the reason there isn't a funcall, is that you hardly ever need it in a Lisp-1 (meaning, functions and other bindings share the same name space in clojure)