[Haskell-cafe] Haskell Weekly News: Issue 136 - October 17, 2009
jfredett at gmail.com
jfredett at gmail.com
Sat Oct 17 00:53:21 EDT 2009
Haskell Weekly News
Issue 136 - October 17, 2009
Welcome to issue 136 of HWN, a newsletter covering developments in the
Over the last week, fpisfun from reddit announced a new subreddit
for simple, direct applications of Haskell to common problems which
normally might be solved by a perl script or bit of bash. There are a
number of examples already there, and the numbers keep growing. It's
not just command-line utilities either, there is also this post on
calculating the bend needed for a bay window curtainrod. There is
plenty of great material if you're new to Haskell and looking for some
basic examples of different simple projects, examples of using monads
and functors appropriately, or just want to see some 'real' programs in
Haskell, it's worth a look!
Also, a small correction, due to some issues with the tools, unicode
characters get replaced with their ASCII 'equivalents' so that an 'e'
with an umlaut becomes an 'e' character. Thanks to Wolfram Kahl for
pointing out that this change is not as innocent as I thought,
apologies thusly to Guenther Schmidt (I'm told thats a better
approximation of the correct spelling) for the error, I apologize in
advance for any other similar errors. I'm working on improving the
unicode support in the tools, but it's a nasty bug to catch.
This was a long editorial, so I won't take any more of your time,
Haskellers, the Haskell Weekly News!
Call for Contributions - Haskell Communities and Activities Report,
November 2009 edition. voigt called for contributions to the
November 2009 issue of the Haskell Communities and Activities Report.
See post for details.
Call for Participation: VSTTE 2009. Jean-Christophe Filliatre
announced a call for participation for the VSTTE Workshop.
WFLP 2010 Call for papers. Pablo Nogueira announced a call for
papers for the 2010 WFLP.
BAHUG Next meeting: October 21st at MIT (32G-882). Ravi Nanavati
announced the next meeting of the Boston Area Haskell User's Group.
Which will be in the CSAIL Reading Room at MIT. This editor hopes to
actually make it to this one, so maybe I'll see you there!
fp-southwales, the South Wales Functional Programming User Group. Andy
Gimblett announced the formation of fp-southwales, a user group for
anybody interested in functional programming in the area of south
The Monad.Reader (14) - Call for copy. Brent Yorgey announced the
call for copy for the next issue of `The Monad.Reader`, Issue #14
Extensions to Vec uploaded (useful for GPipe programs). Tobias Bexelius
announced two extensions to the Vec package: Vec-Transform and
Vec-Boolean. Vec-Transform provides some 4x4 transform matrices such as
perspective projection and rotation. Vec-Boolean provides Data.Boolan
instances for the Vec data types.
Bindings to FFMpeg library. Vasyl Pasternak announced the next
release of the hs-ffmpeg library. Downloadable from Hackage along with
the ffmpeg-tutorials, which show capabilities of this library. The
installation process is a bit tricky so Vasyl put up a blog post
which describes the installation process.
Haskell Hackathon in Zurich, Switzerland. Johan Tibell announced a
Hackathon in Zurich, to be held in March in the Google office. No
concrete date has been decided, but if your interested, make sure to
add your name here.
Reverse Dependencies in Hackage (demo). Roel van Dijk announced his
patch to add reverse-dependencies to Hackage, see the linked post for
information on where to see an example version of hackage.
Relational Algebra. Guenther Schmidt asked about whether or not a
EDSL for relational algebra in Haskell.
GHC devs. Andrew Coppin asked about how many GHC Developers there
are, and was somewhat surprised with the answer.
Fuzzy Logic / Linguistic Variables. Neal Alexander demonstrated an
implementation of fuzzy logic taken from the book: 'Programming Game AI
by Example' by Mat Buckland. In the book, the code was in C++,
rewriting it in Haskell made for much more succint, readable code.
Graph Library Using Associated Types. Lajos Nagy asked about using
Associated types in a Graph library.
Is proof by testing possible? Muad'Dib asked us Haskell Mentat's
about whether it was possible to prove a function correct in a finite
number of tests. The discussion brought forth not only answers but some
/very cool/ results about the application of compactness (in the
topological sense) to testing.
Haskell news from the blogosphere. Blog posts from people new
to the Haskell community are marked with >>>, be sure to welcome them!
* Don Stewart (dons): LACSS 2009: Domain Specific Languages and
* FP Lunch: Factorising folds for faster functions.
* Mikael Vejdemo Johansson (Syzygy-): [MATH 198] Lecture 4 and a
question for the community. More of Syzygy's lectures on category
theory, Syzygy also asks about what it means to 'integrate' a
* Neil Brown: Emulating Shared Mutable Variables with
* Galois, Inc: Tech Talk: Writing Linux Kernel Modules with
* Galois, Inc: Domain Specific Languages for Domain Specific
* FP-Syd: Sydney FP Group: FP-Syd #18..
* Neil Brown: The octopus, the boids and GHC 6.12.1rc1.
* Brent Yorgey: Call for submissions: Monad.Reader issue 15.
* Brent Yorgey: diagrams 0.2.1, and future plans.
* Don Stewart (dons): Self-optimizing data structures: using
types to make lists faster.
* Martijn van Steenbergen: Context Synonyms.
* Joachim Breitner: arbtt: Now with Documentation.
* Dan Piponi (sigfpe): Vectors, Invariance, and Math APIs.
* Creighton Hogg: How to teach Category Theory?.
Quotes of the Week
* sproingie: How do you beta-reduce a problem like Maria
* Baughn: There's also the language, Quine, whose interpreter is
implemented as a symlink to /bin/cat
* benmachine: [on the best editor] opinions vary. from correct
opinions i.e. mine to other ones. [editor's comment: Obviously,
this question is settled, the best editor is *garbled*]
* pozic: statistics. a wonderful tool to control people.
* FunctorSalad: I think the 'asks', 'gets' etc family of names is
sort of cute, like the program is talking about itself in the third
* mmorrow:: Right, that's just beggin for a State monad.
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