swap keys and values in a map

Question

Is there a function to swap the key and value of a given map. So given a map, I want the keys to become values, and values the keys.

(swap {:a 2 b 4}) => {2 :         


        

Answer 1

This is the purpose of map-invert in clojure.set:

user=> (clojure.set/map-invert {:a 2 :b 4})
{4 :b, 2 :a}