clojure.core/when-some

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Type: macro Added: Clojure 1.6 Examples: 3 Runnable: 3

([bindings & body])

bindings => binding-form test

When test is not nil, evaluates body with binding-form bound to the value of test

Examples

by Dimagog on 2015-02-09 ▶

(when-some [x 1] [x :ok]) [1 :ok] (when-some [x nil] [x :ok]) nil

by viper110110 on 2015-05-27 ▶

(when-some [x "Hello"] (println x)) "Hello" nil (when-some [x nil] (println x)) nil

by brunchboy on 2015-08-24 ▶

;; In contrast with when-let, when-some evaluates the body for false values: (when-some [x false] {:x x}) ; => {:x false} ;; While when-let suppresses evaluation for false values: (when-let [x false] {:x x}) ; => nil

See also

• clojure.core/if-some
• clojure.core/when-let (6)
• clojure.core/some (15)
• clojure.core/let (7)
• clojure.core/when (3)

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