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You're viewing version 1.2.0 of repeatedly. The latest stable version of Clojure Core is 1.3.0.

doc source examples comments

1.2.0

1.2.0
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)
```
;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)
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:4058 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"}
  ([f] (lazy-seq (cons (f) (repeatedly f))))
  ([n f] (take n (repeatedly f))))

Vars in clojure.core/repeatedly: cons defn lazy-seq take

Used in 2 other vars test-statistic-distribution list-of

Comments top

1 comment(s) for repeatedly.

boxie

link

if the function you want to repeat doesn't have side effects and has an argument, 'iterate' may be what you are looking for.

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