I assume this is a pretty reliable way: (:require [clojure.core.async.impl.protocols :refer [closed?]])
(closed? a-chan) On Thursday, October 29, 2015 at 2:07:00 PM UTC-7, Lucas Bradstreet wrote: > > Fantastic release. I've been waiting for poll! and offer! for a while. > > What is the recommended way to check whether a channel is closed? > Previously if the channel returned nil, then we know the channel is > closed, however with poll! we can't tell between the channel being > closed or just empty. > > Thanks again, > > Lucas > > On 29 October 2015 at 05:06, Alex Miller <al...@puredanger.com > <javascript:>> wrote: > > I am happy to announce a long-overdue core.async release. > > > > Dependency info: [org.clojure/core.async "0.2.371"] > > > > There are a few new features in this release: > > > > 1) promise-chan is a function that returns a new kind of channel (with a > > custom buffer) with promise semantics. Specifically, channels make a > > one-time transition to having a deliverable value. promise-chan takes an > > optional transducer, and an optional exception-handler (like chan). A > > promise channel can take exactly one value that consumers will receive. > Once > > full, puts complete but val is dropped (no transfer). > > Consumers will block until either a value is placed in the channel or > the > > channel is closed (and nil will be delivered). > > > > 2) offer! and poll! are two new non-blocking functions available on > > channels. > > > > offer! puts a val into a channel if it can do so immediately and will > never > > block. Returns true if offer succeeds. > > poll! takes a val from a channel if it can do so immediately and will > never > > block. Return a value if successful, nil otherwise. > > > > All changes: > > > > ASYNC-103 - NEW promise-chan > > ASYNC-104 - NEW non-blocking offer!, poll! > > ASYNC-124 - dispatch multiple pending takers resulting from expanding > > transducer > > ASYNC-101 - async/reduce now respects reduced > > ASYNC-112 - replace "transformer" with "transducer" in deprecation > messages > > ASYNC-6 - alts! docs updated to explicitly state ports is a vector > > Support (try (catch :default)) in CLJS exception handling > > Use cljs.test > > Updated tools.analyzer.jvm version (and other upstream deps) - fixes > various > > analyzer errors > > > > > > -- > > You received this message because you are subscribed to the Google > > Groups "Clojure" group. > > To post to this group, send email to clo...@googlegroups.com > <javascript:> > > Note that posts from new members are moderated - please be patient with > your > > first post. > > To unsubscribe from this group, send email to > > clojure+u...@googlegroups.com <javascript:> > > 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+u...@googlegroups.com <javascript:>. > > For more options, visit https://groups.google.com/d/optout. > -- 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.
