Performs a depth-first, post-order traversal of form. Calls f on
each sub-form, uses f's return value in place of the original.
Recognizes all Clojure data structures. Consumes seqs as with doall.
(use 'clojure.walk)
(let [counter (atom -1)]
(postwalk (fn [x]
[(swap! counter inc) x])
{:a 1 :b 2}))
=> [6 {2 [[0 :a] [1 1]], 5 [[3 :b] [4 2]]}]
;;example of removing namespaces from all keys in a nested data structure
(def thing {:page/tags [{:tag/category "lslsls"}]})
(postwalk #(if(keyword? %)(keyword (name %)) %) thing)
{:tags [{:category "lslsls"}]}
Source
clojure/walk.clj:50
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(defn postwalk
"Performs a depth-first, post-order traversal of form. Calls f on
each sub-form, uses f's return value in place of the original.
Recognizes all Clojure data structures. Consumes seqs as with doall."
{:added "1.1"}
[f form]
(walk (partial postwalk f) f form))
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