(require '[clojure.walk :as w])

user=> (w/walk (fn [[k v]] [k (* 10 v)]) identity {:a 1 :b 2 :c 3})
{:a 10, :c 30, :b 20}

user=> (w/postwalk #(if (number? %) (* 2 %) %) [[1 2 3] [4 7 2] [2 5 2]])
[[2 4 6] [8 14 4] [4 10 4]]

user=> (let [s [1 '(2 3 [1])]] 
         (w/postwalk #(if (seq? %) (vec %) %) s))
[1 [2 3 [1]]]

user=> (w/walk (comp vec reverse) identity {0 :start 1 :inprogress 2 :end})
{:start 0, :inprogress 1, :end 2}

(require '[clojure.walk :as w])

user=> (w/walk (fn [[k v]] [k (* 10 v)]) identity {:a 1 :b 2 :c 3})
{:a 10, :c 30, :b 20}