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folder (clj)

(source)

function

(folder coll xf)
Given a foldable collection, and a transformation function xf, returns a foldable collection, where any supplied reducing fn will be transformed by xf. xf is a function of reducing fn to reducing fn.

Examples

denno-clojure/mascarpone
(require '[clojure.core.reducers :as r])

(r/map inc [1 1 1 2])
; => #<reducers$folder$reify__6531 clojure.core.reducers$folder$reify__6531@dd4fe75>