realized?

(realized? x)

如果给定的 promisedelayfuture 或者 lazy-list 对象已经有值了,那么返回 true

查看源码

user=> (def d (delay (+ 1 1)))
#'user/d

user=> (realized? d)
false

user=> @d
2

user=> (realized? d)
true

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