Good question. I've been rooting around arrow land for the past few days. *some->* , now a part of clojure.core, was originally in core.incubator as *-?>*. From the documentation, it's the *same as clojure.core/-> but returns nil as soon as the threaded value is nil itself (thus short-circuiting any pending computation)*. So for example:
(some-> "foo" .toUpperCase) "FOO" (some-> "foo" .toUpperCase (.substring 1)) "OO" *as->* was introduced in 1.5, as part of a bunch of new threading macros<https://github.com/clojure/clojure/blob/master/changes.md#24-new-threading-macros>. It *binds name to expr, evaluates the first form in the lexical context of that binding, then binds name to that result, repeating for each successive form*.The example they give is below. user=> (-> 84 (/ 4) (as-> twenty-one ;; uses the value from -> (* 2 twenty-one))) ;; no threading here 42 Here's a few more arrow resources. - LonoCloud/synthread <https://github.com/LonoCloud/synthread> - rplevy/swiss-arrows <https://github.com/rplevy/swiss-arrows> - clojure/core.incubator <https://github.com/clojure/core.incubator> - Build An Arrow ← <http://www.clojure.net/2013/10/16/Build-an-arrow/> Hth Tim Washington Interruptsoftware.com <http://interruptsoftware.com> On Mon, Apr 7, 2014 at 10:02 PM, Plínio Balduino <pbaldu...@gmail.com>wrote: > Hi there > > It's being hard to find updated documentation with 1.5+ features and I'm > confused about as-> and some->. > > Basically, what's the difference between the contrib -?> and the core > some-> ? > > Thank you > > Plínio > -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
