The ‘completing’ function can be used to add the missing arity to a reducing
function that is missing it.
http://clojure.github.io/clojure/clojure.core-api.html#clojure.core/completing
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The 1-argument form of a reducing function is called at the end of the
reduce. So for example:
(defn mean
"Transducer that returns the mean average."
([] [0 0])
([[sum count]]
(/ sum count))
([[sum count] value]
[(+ sum value) (inc count))
On Fri, 25 Jan 2019 at 22:19, Brian Craft
