Hi, folks.
I'm wondering if Clojure library has 'reduce' function version which is
like (reduce f coll) - i.e. it applies function to coll elements without
the initial value but at the same time allows to use external accumulator
which is passed to f as well. Better look at the code:
(defn reduce-with-acc
"Applies f to first two coll elements and acc producing new acc value for
subsequent f calls. Returns acc. On singleton or empty collection returns
acc immediately."
[f acc coll]
(loop [a (first coll) acc acc s (next coll)]
(if (seq s)
(let [b (first s)]
(recur b (f a b acc) (next s)))
acc)))
Regards,
Alexander.
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