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You're viewing version 1.2.0 of map-invert. The latest stable version of Clojure Core is 1.3.0.

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1.2.0

1.2.0
1.3.0

map-invert

clojure.set

(map-invert m)

Returns the map with the vals mapped to the keys.

© Rich Hickey. All rights reserved. Eclipse Public License 1.0

1 Example top

link | changes
```
;; Despite being in clojure.set, this has nothing to do with sets. 

user=> (map-invert {:a 1, :b 2})
{2 :b, 1 :a}

;; If there are duplicate keys, one is chosen:

user=> (map-invert {:a 1, :b 1})
{1 :b}

;; I suspect it'd be unwise to depend on which key survives the clash.
```
;; Despite being in clojure.set, this has nothing to do with sets. user=> (map-invert {:a 1, :b 2}) {2 :b, 1 :a} ;; If there are duplicate keys, one is chosen: user=> (map-invert {:a 1, :b 1}) {1 :b} ;; I suspect it'd be unwise to depend on which key survives the clash.

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Source clojure/set.clj:106 top

(defn map-invert
  "Returns the map with the vals mapped to the keys."
  {:added "1.0"}
  [m] (reduce (fn [m [k v]] (assoc m v k)) {} m))

© Rich Hickey. All rights reserved. Eclipse Public License 1.0

Vars in clojure.set/map-invert: assoc defn fn reduce

Used in 0 other vars

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