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doc source examples comments

1.3.0

constantly

clojure.core

(constantly x)

Returns a function that takes any number of arguments and returns x.

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

2 Examples top

link | changes
```
user=> (def boring (constantly 10))
#'user/boring

user=> (boring 1 2 3)
10
user=> (boring)
10
user=> (boring "Is anybody home?")
10
```
user=> (def boring (constantly 10)) #'user/boring user=> (boring 1 2 3) 10 user=> (boring) 10 user=> (boring "Is anybody home?") 10
link | changes
```
;; A really goofy way to find the size of a collection
user=> (reduce + (map (constantly 1) [:a :b :c]))
3
```
;; A really goofy way to find the size of a collection user=> (reduce + (map (constantly 1) [:a :b :c])) 3

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See Also top

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Source clojure/core.clj:1344 top

(defn constantly
  "Returns a function that takes any number of arguments and returns x."
  {:added "1.0"
   :static true}
  [x] (fn [& args] x))

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

Vars in clojure.core/constantly:

Used in 0 other vars

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