Apply multiple methods to a Clojure list?

4
votes

I'm just starting out learning Clojure (my first Lisp-like language) so I'm sorry if this question is very silly.

I'd like to apply multiple methods on a list. So far I've come up with

(defn sqr  [x] (* x x))
(def my-list '(4 7 9))
(map inc (map sqr (map dec my-list)))
;= (10 37 65)

Is there a better (more concise/idiomatic) way to do this? Ideally I'd like to do something like

(apply-multiple (dec sqr inc) my-list)

...which would also return (10 37 65).

1
clojure

1 Answers

8
votes

Just use function composition:

(map (comp inc sqr dec) my-list)

Or if you prefer to write them down in the reverse order (like in your example):

(map #(-> % dec sqr inc) my-list)