Will definitely be using this, thanks! One question: "Those IFn.LLL, DDD etc primitive-taking function interfaces can now spring to life."
Can someone unpack this? What are those things, why does this allow them to exist, why do we need them, what can be built with them? On Tue, May 8, 2012 at 11:20 AM, Rich Hickey <richhic...@gmail.com> wrote: > I'm happy to have pushed [1] today the beginnings of a new Clojure library > for higher-order manipulation of collections, based upon *reduce* and *fold*. > Of course, Clojure already has Lisp's *reduce*, which corresponds to the > traditional *foldl* of functional programming. *reduce* is based upon > sequences, as are many of the core functions of Clojure, like *map*, *filter* > etc. So, what could be better? It's a long story, so I'll give you the ending > first: > > * There is a new namespace: clojure.core.reducers > * It contains new versions of *map*, *filter* etc based upon transforming > reducing functions - reducers > * It contains a new function, **fold**, which is a parallel reduce+combine > * *fold* uses **fork/join** when working with (the existing!) Clojure vectors > and maps > * Your new parallel code has exactly the same shape as your existing > seq-based code > * The reducers are composable > * Reducer implementations are primarily functional - no iterators > * The model uses regular data structures, not 'parallel collections' or other > OO malarkey > * It's fast, and can become faster still > * This is work-in-progress > > I've described the library in more detail here: > > http://clojure.com/blog/2012/05/08/reducers-a-library-and-model-for-collection-processing.html > > Rich > > [1] > https://github.com/clojure/clojure/commit/89e5dce0fdfec4bc09fa956512af08d8b14004f6 > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with your > first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
