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by sax
5145 days ago
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If you haven't read his introductory post check it out here: http://clojure.com/blog/2012/05/08/reducers-a-library-and-mo... My understanding is this: the genesis for fold (as opposed to foldl) is from the linked talk: http://vimeo.com/6624203. If fold (a concurrent reduce) is used instead of foldl (a sequential reduce), then the mapping function can be pushed down and applied concurrently to the various elements. A generic mechanism can then be used for dispatching concurrent operations. These functional operation are composed of first mapping (and/or) filtering and then reducing. [EDIT: typo and re-phrase] |
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