find
- (find map key)
Returns the map entry for key, or nil if key not present.
© Rich Hickey。保留所有权利。 Eclipse 公共许可 1.0
2 Examples
(find {:a 1 :b 2 :c 3} :a) ;;=> [:a 1] (find {:a nil} :a) ;;=> [:a nil] (find {:a 1 :b 2 :c 3} :d) ;;=> nil
;; Note for these examples: as the authoritative documentation speaks only about ;; map (as first parameter), passing anything else (e.g. a vector, like below) ;; uses an undocumented behavior, which can change anytime and so is unreliable and ;; should be avoided. user=> (find [:a :b :c :d] 2) [2 :c] user=> (find [:a :b :c :d] 5) nil user=> (find [1 2 3] 4294967296) [4294967296 1]