Keep certain keys of a hash-map

Question

What would be a quick way to keep only certain keys from a hash-map?

(def m {:a 1 :b 2 :c 3 :d 4})

explicit version:

((fn [{:keys [b c]}] {:b b :c c})
 m)
;= {:b 2, :c 3}

Answer 1

select-keys:

(select-keys m [:b :c])