clojure, using a list of functions

Question

I would like to define a list of functions to use within juxt, however I am having trouble implementing it.

Heres an example of what I want:

(defn sin [n] (Math/sin n))
(defn cos [n] (Math/cos n))
((juxt sin cos) 4)
>> [-0.7568024953079282 -0.6536436208636119]

Now instead of saying ((juxt sin cos) 4) I would prefer to say ((juxt trig) 4) where (def trig [sin cos]). I have attempted ((apply juxt trig) 4) and a few other things but nothing seems to stick. Thanks!

skuro · Accepted Answer · 2011-08-11 06:16:44Z

5

apply seems to work fine:

user=> ((juxt sin cos) 4)
[-0.7568024953079282 -0.6536436208636119]
user=> ((apply juxt trig) 4)
[-0.7568024953079282 -0.6536436208636119]

answered Aug 11, 2011 at 6:16

skuro

13.5k2 gold badges50 silver badges68 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sean Allred · Accepted Answer · 2016-05-22 19:46:42Z

5

I think you have a correct solution. For me it works:

Clojure 1.2.1
user=> (defn sin [n] (Math/sin n))
#'user/sin
user=> (defn cos [n] (Math/cos n))
#'user/cos
user=> (def trig [sin cos])
#'user/trig
user=> ((apply juxt trig) 4)
[-0.7568024953079282 -0.6536436208636119]

edited May 22, 2016 at 19:46

Sean Allred

3,6784 gold badges36 silver badges78 bronze badges

answered Aug 11, 2011 at 6:18

Joe Lehmann

1,0855 silver badges10 bronze badges

Collectives™ on Stack Overflow

clojure, using a list of functions

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related