[cwn] Attn: Development Editor, Latest OCaml Weekly News

[Alan Schmitt]

Hello


2019.

Table of Contents
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Lascar-0.6-alpha
Lwt 4.3.0 — preparing for 5.0.0
Are there any OCaml podcasts out there?
Other OCaml News
Old CWN


Lascar-0.6-alpha
════════════════

Here is the latest OCaml Weekly News, for the week of August 20 to 27, Archive: <https://discuss.ocaml.org/t/ann-lascar-0-6-alpha/4270/1>

jserot announced
────────────────


 library for manipulating Labeled Transition Systems in OCaml.


 installing with `dune' and removing the dependency on `camlp4'.

 `Lascar' is available in source code from [github] or as a [opam
 package].


[github] <https://github.com/jserot/lascar>

[opam package] <http://opam.ocaml.org/packages/lascar/>


Lwt 4.3.0 — preparing for 5.0.0
═══════════════════════════════

 Archive:
 <https://discuss.ocaml.org/t/lwt-4-3-0-preparing-for-5-0-0/4275/1>


Anton Bachin announced
──────────────────────


 concurrent I/O library. It is now installable from opam:

 ┌────
 │ opam update && opam upgrade lwt
 └────

 <https://github.com/ocsigen/lwt>

 Lwt 4.3.0 is a relatively small release, offering a few

 the upcoming Lwt 5.0.0. Everything is detailed in the [*full

 now.

 The breaking changes are relatively minor and should affect few

 are experimental features that never matured.


 relevant to everyone:

 1. The signature of [`Lwt.async'] will become
    ┌────
    │ Lwt.async : (unit -> unit Lwt.t) -> unit
    └────

    See [#603].


    return a promise that never resolves. See [#562].

 Happy concurrent programming!


[*Lwt*] <https://github.com/ocsigen/lwt>

This is to announce the availability of version 0.6 of `Lascar', a This release is essentially a repackaging to support building and We are pleased to announce release *4.3.0* of [*Lwt*], the promise and improvements. However, it announces several new breaking changes for changelog*]. Lwt 5.0.0 is planned for November 2019, three months from users. About half are simply removing unused features, some of which There are two breaking changes planned for 5.0.0 that are probably 2. [`Lwt.choose'], [`Lwt.pick'], and similar functions, will raise `Invalid_argument' if called with an empty list. Right now, they [*full changelog*] <https://github.com/ocsigen/lwt/releases/tag/4.3.0>

[`Lwt.async']
<https://github.com/ocsigen/lwt/blob/705a206ad64149be6cc93bb1447ce22fd14017ca/src/core/lwt.mli#L792>

[#603]
<https://github.com/ocsigen/lwt/issues/603#issuecomment-523139684>

[`Lwt.choose']
<https://github.com/ocsigen/lwt/blob/705a206ad64149be6cc93bb1447ce22fd14017ca/src/core/lwt.mli#L1001>

[`Lwt.pick']
<https://github.com/ocsigen/lwt/blob/705a206ad64149be6cc93bb1447ce22fd14017ca/src/core/lwt.mli#L961>

[#562] <https://github.com/ocsigen/lwt/pull/562>


Are there any OCaml podcasts out there?
═══════════════════════════════════════

 Archive:
 <https://discuss.ocaml.org/t/are-there-any-ocaml-podcasts-out-there/4277/1>


Ozan Sener asked
────────────────

 Over the last two years OCaml has become my favorite language to

 build real things that were previously out of my comfort

 missing out.

program in. Decades of resources, open source projects, mailing list posts and IRC/Discord logs all helped me develop a taste for ML and zone. Unfortunately, I'm currently not in a circle where I can tap into know-how of experienced OCaml developers, and I feel like I'm I've been listening to <https://reason.town/> lately, and I really like the casual format. Do you have anything similar, on any medium,

 that you are following?


Yawar Amin replied
──────────────────


 @avsm on FLOSS Weekly talking about Mirage and OCaml
 <https://twit.tv/shows/floss-weekly/episodes/302>


Armael also replied
───────────────────


 MirageOS hack retreat:
 <https://discuss.ocaml.org/t/mirageos-audio-profiles-podcast-series/1482>.


Other OCaml News
════════════════

From the ocamlcore planet blog
──────────────────────────────



 • [Decompress: The New Decompress API]
 • [Derivations as computations]


[OCaml Planet] <http://ocaml.org/community/planet/>

[Decompress: The New Decompress API]
<https://tarides.com/blog/2019-08-26-decompress-the-new-decompress-api.html>

[Derivations as computations]
<http://math.andrej.com/2019/08/21/derivations-as-computations/>


Old CWN
═══════


 archives].


 [online].

 [Alan Schmitt]


[send me a message] <mailto:alan.schm...@polytechnique.org>

[the archive] <http://alan.petitepomme.net/cwn/>

I've never heard of an OCaml-specific podcast but I think sometimes OCamlers go on as guests in other podcasts. One that I enjoyed was There was also a series of podcasts done during the December 2017 Here are links from many OCaml blogs aggregated at [OCaml Planet]. If you happen to miss a CWN, you can [send me a message] and I'll mail it to you, or go take a look at [the archive] or the [RSS feed of the If you also wish to receive it every week by mail, you may subscribe [RSS feed of the archives] <http://alan.petitepomme.net/cwn/cwn.rss>

[online] <http://lists.idyll.org/listinfo/caml-news-weekly/>

[Alan Schmitt] <http://alan.petitepomme.net/>

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