(defn mapset [func ele] (loop [elements ele result []] (if (empty? elements) (set result) (let [[first-value & another] elements] (into result (func first-value)) (recur another result))))) (def v [1 2 3 4 5]) (mapset + v) Error while trying to run:
Don't know how to create ISeq from: java.lang.Long 
into .The second argument can be a collection or a transducer , but not a number .
Since you want to add not a collection of elements, but only one, you do not need into at all. You actually need the conj function .
You have one more logical error there related to the immunity of vectors. And because of it, your mapset function mapset now equivalent (constantly #{}) . What exactly is the mistake, I suggest to find it yourself.
Source: https://ru.stackoverflow.com/questions/661660/
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