counting only truthy values in a collection

Asked 2012-09-20T18:06:29.660

Possible Duplicate:
how to return only truthy values as the result of a map operation

I have a collection which has falsy and truthy values. I would like to only count the truthy values, is there a way to do that ?

(count (1 2 3 nil nil)) => 5

clojure

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1 Answer

(defn truthy-count [coll] 
   (reduce + 0 
     (map #(if % 1 0) coll)))

Although I admit I like dAni's solution better.

answered 2012-09-20T19:28:47.950