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1.3.0

repeatedly

clojure.core

(repeatedly f)
(repeatedly n f)

Takes a function of no args, presumably with side effects, and
returns an infinite (or length n if supplied) lazy sequence of calls
to it

2 Examples top

link | changes
```
;these two functions are equivalent 

user=> (take 5 (repeatedly #(rand-int 11)))
(6 6 3 9 8)

user=> (repeatedly 5 #(rand-int 11))
(1 8 6 9 6)

;compare with repeat
user=> (repeat 5 (int (rand 100)))
(94 94 94 94 94)
```
;these two functions are equivalent user=> (take 5 (repeatedly #(rand-int 11))) (6 6 3 9 8) user=> (repeatedly 5 #(rand-int 11)) (1 8 6 9 6) ;compare with repeat user=> (repeat 5 (int (rand 100))) (94 94 94 94 94)
link | changes
```
(defn counter []  
  (let [tick (atom 0)]
    #(swap! tick inc)))

(def tick (counter))

user=> (take 10 (repeatedly tick))
(1 2 3 4 5 6 7 8 9 10)
```
(defn counter [] (let [tick (atom 0)] #(swap! tick inc))) (def tick (counter)) user=> (take 10 (repeatedly tick)) (1 2 3 4 5 6 7 8 9 10)

Source clojure/core.clj:4512 top

(defn repeatedly
  "Takes a function of no args, presumably with side effects, and
  returns an infinite (or length n if supplied) lazy sequence of calls
  to it"
  {:added "1.0"
   :static true}
  ([f] (lazy-seq (cons (f) (repeatedly f))))
  ([n f] (take n (repeatedly f))))

Vars in clojure.core/repeatedly:

Used in 0 other vars

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Clojure Core

Namespaces

repeatedly

clojure.core

2 Examples top

See Also top

Source clojure/core.clj:4512 top

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