clojure.walk/stringify-keys

View this page on ClojureDocs

Type: function Added: Clojure 1.1 Examples: 3 Runnable: 3

([m])

Recursively transforms all map keys from keywords to strings.

Examples

by philos99 on 2014-04-19 ▶

(use 'clojure.walk) (stringify-keys {:a 1 :b 2}) ;=> {"a" 1, "b" 2}

by eunmin on 2016-10-20 ▶

(use 'clojure.walk) (stringify-keys {:a 1 :b {:c {:d 2}}}) ;=> {"a" 1, "b" {"c" {"d" 2}}}

by kevo1ution on 2021-06-24 ▶

(use 'clojure.walk) (stringify-keys {:hello/world 1}) ;=> {"world" 1}

Note by gongpengjun

Recursively transforms all map keys and values from strings to keywords.

(use 'clojure.walk)
(defn stringify-keys-and-vals
  "Recursively transforms all map keys and values from keywords to strings."
  [m]
  (let [kf (fn [[k v]] (if (keyword? k) [(name k) v] [k v]))
        vf (fn [[k v]] (if (keyword? v) [k (name v)] [k v]))]
    ;; only apply to maps
    (postwalk (fn [x] (if (map? x) (into {} (map #(-> % kf vf) x)) x)) m))) 

Example:

(stringify-keys-and-vals {:a :hello :b :world})
;=> {"a" "hello", "b" "world"}
(stringify-keys-and-vals {:a {:hello :world} :b [{:love :clojure} {:hate :other}]})
;=> {"a" {"hello" "world"}, "b" [{"love" "clojure"} {"hate" "other"}]}

See also

• clojure.walk/keywordize-keys (3)

---

Content from the matching ClojureDocs page, with authors credited on each contribution.