[Haskell-cafe] Haskell Weekly News: Issue 79 - July 31, 2008
byorgey at seas.upenn.edu
Thu Jul 31 16:47:57 EDT 2008
Haskell Weekly News
Issue 79 - July 31, 2008
Welcome to issue 79 of HWN, a newsletter covering developments in the
Apologies for the slightly late issue this week, attributable to a
combination of having to transfer all my files onto a different
computer (my former employer had the audacity to request the return of
their laptop, now that I no longer work for them) and packing up to
move to Philadelphia on Saturday. At any rate, some exciting news this
week, including #haskell passing the 500 mark and a new release of Yi
Correction from last week's issue: congratulations were bestowed upon a
certain "Dr. Johansson" who does not, in fact, exist, having been
replaced almost a year ago by the happily married but otherwise
identical Dr. Mikael Vejdemo-Johansson.
A fancier Get monad or two (a la binary and binary-strict). Chris
Kuklewicz announced two new Get-like monads for binary data, with a
number of additional features.
#haskell irc channel reaches 500 users. Don Stewart announced that
6 1/2 years after its inception, under the guiding hand of Shae Erisson
(aka shapr), the #haskell IRC channel on freenode has finally
reached 500 users! This puts the channel at around the 12th largest
(and mostest friendliest) community of the 7000 freenode channels.
RandomDotOrg-0.1. Austin Seipp announced the release of the
RandomDotOrg package, an interface to the random.org random
Mueval 0.3.1, 0.4, 0.4.5, 0.4.6, 0.5. Gwern Branwen announced a
number of releases of Mueval, a package allowing dynamic runtime
evaluation of Haskell expressions. As far as anyone knows, all possible
security holes have been plugged, and it's missing only a few features
before it can replace hs-plugins as lambdabot's evaluation mechanism.
Need functional programmers for debugging study. Chris Bogart asked
for functional programmers currently developing or maintaining a medium
to large-sized program, willing to let him look over their shoulder
while they do debugging or coding on the project.
Yi 0.4.1. Jean-Philippe Bernardy announced the 0.4.1 release of the
Yi editor, a text editor written and extensible in Haskell. The
long-term goal of the Yi project is to provide the editor of choice for
Hipmunk 0.1 and HipmunkPlayground 0.1. Felipe Lessa announced the
availability of Hipmunk, containing bindings for the Chipmunk
2D physics engine, and Hipmunk Playground, where you may see some
of Hipmunk's features in action. The bindings are low-level but try to
hide most of the nasty details of the C code.
faster BLAS bindings. Patrick Perry announced that he has
largely closed the C performance gap with his recent Haskell
BLAS bindings. Expect a new release shortly.
FPers in Northwest Arkansas?. Nathan Bloomfield is wondering if
there are any Haskellers in the NW Arkansas region to start a
functional programming interest group in the area.
Italian Haskellers Summer Meeting. Pasqualino 'Titto' Assini
announced something about a summer meeting for Italian Haskellers.
If you would like to know precisely what it was that was announced, I
suggest you learn Italian.
InterleavableIO. Marco Tulio Gontijo e Silva announced a package,
interleavableIO, based on Jules Bean (quicksilver)'s monadic
Google Summer of Code
Progress updates from participants in the 2008 Google Summer of
Hoogle 4. Neil Mitchell (ndm) is working on Hoogle 4. This
week, he rewrote type search: after three days of coding, it required
only a few minor debugging tweaks to get it to work. Haskell FTW!
Expect a public beta of the command line interface next week.
Generic tries. Jamie Brandon is working on a library for efficient maps
using generalized tries. This week, he has finally got everything
up and running bug free on the new API, except the internals are still
using association lists instead of AVL trees. He also exhibits a
DPH physics engine. Roman Cheplyaka (Feuerbach) is working on a
physics engine using Data Parallel Haskell.
GHC plugins. Max Bolingbroke is working on dynamically loaded plugins
Cabal dependency framework. Andrea Vezzosi (Saizan) is working on a
make-like dependency analysis framework for Cabal.
Language.C. Benedikt Huber (visq) is working on Language.C, a
standalone parser/pretty printer library for C99.
GHC API. Thomas Schilling (nominolo) is working on improvements to
the GHC API.
Build system woes. Roman Leshchinskiy began a discussion on Cabal
and GHC's new build system, with some suggestions for improving the
Syb Renovations? Issues with Data.Generics. Claus Reinke brought up
a number of issues with Data.Generics, with suggestions for
A question about mfix. Wei Hu asked a question about the definition
and semantics of mfix, the monadic fix operation.
Using fundeps to resolve polymorphic types to concrete types. Bryan
Donlan asked a question about the interaction between functional
dependencies and type checking, with a rather subtle answer.
Best book/tutorial on category theory and its applications. fero
asked for recommendations on a book about category theory.
Loss of humour. Andrew Coppin laments the loss of some of Haskell's
Haskell news from the blogosphere.
* Ketil Malde: Updates and other trivialities.
* Ulisses Costa: Lex/yacc. A short lex/yacc tutorial.
* Luke Plant: Haskell Regex replace. Luke wonders if anyone knows
how to do regex replace in Haskell.
* Eric Kow (kowey): simple random numbers in Haskell. Eric writes
a simple tutorial for the System.Random module.
* Jamie Brandon: Week 7 progress (respect my formatting damnit).
An update on Jamie's Google Summer of Code project.
* Tupil: Formlets in Haskell.
* John Goerzen (CosmicRay): Seen in the Haskell wiki.
* Ulisses Costa: Type inference.
* Dennis Bueno: ICFP Contest 2008 -- The One Liners. Dennis
describes his experiences participating in this year's ICFP
* Magnus Therning: More prefixes.
* Don Stewart (dons): Haskell: Batteries Included.
* >>> Harry Pierson: Monadic Philosophy Part 2 - The LINQ Monad.
* >>> Harry Pierson: Monadic Philosophy. Harry begins a series
explaining his journey through understanding monads.
* Ulisses Costa: Pointfree Calculator.
* Eric Kow (kowey): pandoc gets mediawiki support.
* Dan Piponi (sigfpe): The Fibonacci Numbers, Coalgebraicaly.
* Twan van Laarhoven: Solving nonograms.
* >>> Ayumilove: Haskell Programming Tutorial Part 2A.
* >>> Ayumilove: Haskell Programming Tutorial Part 2B.
* >>> Ayumilove: Haskell Programming Tutorial Part 3.
* >>> Darren Moffat: T5120 donated to Haskell Community. Sun's
donation inspires Darren to get back into Haskell and maybe
contribute some code to GHC again, like he did back when he was a
student at Glasgow.
* Mikael Vejdemo-Johansson (DrSyzygy): Blackbox computing of
A-infinity algebras. The last results from Mikael's thesis have
made it into article form, and are available on the arXiv.
* John Goerzen (CosmicRay): OSCon Update.
* Real-World Haskell: Beta availability hiccups.
* John Goerzen (CosmicRay): First 2 Days of OSCon. John reports
live from OSCon.
* Neil Mitchell: GSoC Hoogle: Week 9. An update on Neil's Google
Summer of Code project.
* Patrick Perry: Addressing Haskell BLAS Performance Issues.
Patrick's Haskell BLAS bindings are now significantly sped up, and
he explains what made the difference.
* Arnar Birgisson (Arnar): Parsing annotated postfix operators
with Haskell. Arnar exhibits a neat pattern for constructing
certain types of parsers, which makes essential use of first-class
Quotes of the Week
* mauke: a hint to beginners: typing 'fix error' in ghci does not
have the intended effect.
* mauke: Hungarian Notation constructs a type system in the mind of
* rwbarton: I was hoping for a pile of Functors.
* Baughn: [on lambdabot] Yes, PMS is a real issue. Poor memory size,
* Cale: There should be a website called "Static Equilibrium or Not"
where you rate pictures according to whether you think the depicted
objects are in static equilibrium.
* sahko: xmonad is an ancient african word for "you dont need to use
a mouse fool".
* doidydoidy: Category theory is exactly like a comic book
alternative universe, except they use the prefix "co-" instead of
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