CODEWITHSUNDEEP
clojurefunction-composition
sortega
sortega

Reputation: 1158

Combine one-arg functions into a multi-arg one in Clojure

I wonder if there is an idiom in Clojure for combining several one argument functions into a new function accepting a vector. The new function should apply the first function to the first argument and so on.

I think this is useful in a number of situations. For example, you might want to transform x, y and z coordinates of a point using simpler unidimensional functions.

I would implement by myself as follows but I'm afraid it should already exists something similar in the standard API.

(defn vector-comp [& fns]
  (fn [avect]
    (vec (map #(%1 %2) fns avect))))

Upvotes: 2

Views: 137

Answers (2)

amalloy
amalloy

Reputation: 91857

https://github.com/flatland/useful/blob/develop/src/useful/fn.clj#L90

Upvotes: 1

Rafał Dowgird
Rafał Dowgird

Reputation: 45071

Other way to write this:

(defn vector-comp [& fns]
    #(map apply fns % (repeat nil)))

I am 99% sure there is no ready-made solution in the standard libraries (juxtcomes the closest that I know of)

Upvotes: 1

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