;; Create a promise user> (def p (promise)) #'user/p ; p is our promise ;; Check if was delivered/realized user> (realized? p) false ; No yet ;; Delivering the promise user> (deliver p 42) #<core$promise$reify__5727@47122d: 42> ;; Check again if it was delivered user> (realized? p) true ; Yes! ;; Deref to see what has been delivered user> @p 42 ;; Note that @ is shorthand for deref user> (deref p) 42
Source
clojure/core.clj:6502
top
(defn realized?
"Returns true if a value has been produced for a promise, delay, future or lazy sequence."
{:added "1.3"}
[^clojure.lang.IPending x] (.isRealized x))
Comments top
No comments for realized?. Log in to add a comment.