Clojure: How do I apply a function to a subset of the entries in a hash-map?

Question

I am not to Clojure and attempting to figure out how to do this.

I want to create a new hash-map that for a subset of the keys in the hash-map applies a function to the

Answer 1

(defn doto-map [m ks f & args]
  (reduce #(apply update-in %1 [%2] f args) m ks))

Example call

user=> (doto-map {:a 1 :b 2 :c 3} [:a :c] + 2)
{:a 3, :b 2, :c 5}

Hopes this helps.