I'm learning Clojure and actually I'm doing some exercises to practice but I'm stuck in a problem:
I need to make a sum-consecutives function which sums consecutive elements in a array, resulting in a new one, as example:
[1,4,4,4,0,4,3,3,1] ; should return [1,12,0,4,6,1]
I made this function which should work just fine:
(defn sum-consecutives [a]
(reduce #(into %1 (apply + %2)) [] (partition-by identity a)))
But it throws an error:
IllegalArgumentException Don't know how to create ISeq from: java.lang.Long clojure.lang.RT.seqFrom (RT.java:542)
Can anyone help me see what is wrong with my func? I've already search this error in web but I find no helpful solutions.