[Haskell-cafe] Haskell Weekly News: Issue 121 - June 13, 2009
byorgey at seas.upenn.edu
Sat Jun 13 17:28:44 EDT 2009
Haskell Weekly News
Issue 121 - June 13, 2009
Welcome to issue 121 of HWN, a newsletter covering developments in the
purely functional lazy non-deterministic programming. Sebastian Fischer
announced the explicit-sharing library, which supports lazy
functional-logic programming in Haskell.
nntp 0.0.1. Maciej Piechotka announced the release of nntp, a
library to connect to nntp (i.e. mainly USENET) servers.
OpenGLRaw 184.108.40.206. Sven Panne announced the release of OpenGLRaw,
a low-level binding for OpenGL. The eventual goal is to make the OpenGL
package easier to install, more modular and a bit more flexible.
pgm-0.1 on Hackage. Frederick Ross announced pgm, a pure Haskell
library to read and write PGM images. It seamlessly handles the divide
between 1 and 2 byte per pixel images; reads and writes UArrays; can
handle multiple PGMs concatenated one after another in a file; and
encodes and decodes all comments in the PGM header, which can be used
to drop arbitrary metadata into files in a human readable manner.
iteratee-0.2.1 released. John Lato announced the release of
iteratee-0.2.1, a major update to the iteratee library. This
library provides types and functions for performing enumerator/iteratee
based I/O operations in Haskell, as described by Oleg. The new
version is a large redesign, including support for resumable exceptions
and a greatly simplified interface.
testrunner-0.9. Reinier Lamers announced testrunner, a new
framework for running unit test. It can run unit tests in parallel;
can run QuickCheck and HUnit tests as well as simple boolean
expressions; and comes with a ready-made main function for your unit
serial-0.2. Frederick Ross announced version 0.2 of serial, a
library for working with line-oriented POSIX serial ports.
hunp-0.0. Deniz Dogan announced hunp, a command-line utility
which automagically calls the right "unpacker" program for you and
works on both files and directories.
Nemesis : easy task management. Jinjing Wang announced a new
release of nemesis, a simple rake-like task management tool.
Data.Reify.CSE. Sebastiaan Visser announced the data-reify-cse
module, which implements common sub-expression elimination for graphs
generated by the Data.Reify package. This package might especially be
useful for optimizing simple compilers for referentially transparent
domain specific languages.
Hac phi accommodation: register by June 15 for reduced rate! Brent
Yorgey reminded anyone interested in attending Hac phi that
Monday 15 June is the deadline for getting a special reduced hotel
alloy-1.0.0 (generic programming). Neil Brown announced the
first release of the Allow generic programming library. It is
intended to be a fairly fast blend of several other generics
approaches, such as SYB (but without the dynamic typing) and Uniplate
(but allowing an arbitrary number of target types), for performing
transformations on specific types in large tree structures.
StrictBench 0.1 - Benchmarking code through strict evaluation. R.A.
Niemeijer announced the release of StrictBench, a library for
timing full evaluation of values.
haskeem 0.7.0 uploaded to hackage. Uwe Hollerbach announced
haskeem, a small scheme interpreter written in Haskell.
numtype 1.0 -- Type-level (low cardinality) integers. Bjorn Buckwalter
announced the Numeric.NumType module, now released as its own
package, which implements a unary type-level representation of
integers, supporting addition, subtraction, multiplication, and
Google Summer of Code
Progress updates from participants in the 2008 Google Summer of
space profiling. Gergely Patai has some pretty graphs generated by
his profiling library.
haskell-src-exts. Niklas Broberg is quite close to releasing
haskell-src-exts 1.0.0, as soon as he has full and correct support for
(almost) everything code-related, with only a few things left to do. He
also wrote a post explaining the intricacies of parsing code
containing the 'forall' keyword (well, whether it is a keyword depends
on which extensions are enabled...)
fast darcs. Petr Rockai made a bit less progress this week, with finals
and other things interfering, but made some progress on some
documentation, tracking down a performance regression, and other
Adding an ignore function to Control.Monad. Gwern Branwen proposed
adding an 'ignore' function to Control.Monad which explicitly changes
an m a into a m (). Bikeshedding (and some useful discussion) ensued.
Wiki user accounts. Philippa Cowderoy began a discussion of what to
do about the current situation with wiki user accounts (namely, that
account creation is disabled due to spam, and the one maintainer of the
wiki can't always respond to account creation requests instantly).
Lightweight type-level dependent programming in Haskell. Ryan Ingram
made an interesting post about implementing lightweight closed type
classes in Haskell.
who's up for a hackathon? (ICFP, late Aug, early Sept). Eric Kow
wanted to know who would be interested in having a hackathon
immediately before or after ICFP in Edinburgh.
Galois is hiring functional programmers. Don Stewart announced that
Galois is hiring! See the announcement for more details.
Haskell news from the blogosphere. Blog posts from people new
to the Haskell community are marked with >>>, be sure to welcome them!
* Niklas Broberg: GSoC status report, week 3.
* Joachim Breitner: Introducing L-seed.
* Conal Elliott: Memoizing polymorphic functions - part two.
* London Haskell Users Group: Next Meeting: Sean Leather, Fun and
generic things to do with EMGM.
* David Amos: It's on Hackage!. Haskell for Maths is now just a
* Michael Snoyman: Filename encoding issues.
* David Amos: Permutation groups.
* Edward Kmett: Recursion Schemes: A Field Guide (Redux).
* mightybyte: Intro to HAppS-State.
* Conal Elliott: Memoizing polymorphic functions - part one.
* Lennart Augustsson: More LLVM.
* Roman Cheplyaka: Don't play with your monads.
* Galois, Inc: Tech Talk: Orc in Haskell.
* Petr Rockai: soc progress 3. Progress on Petr's GSoC darcs
* Magnus Therning: Using msmtp with darcs.
* Erik de Castro Lopo: Debian Maintainer. Erik is now a Debian
maintainer, and plans to give Haskell on Debian a much-needed
* Niklas Broberg: What's in a forall?. More Haskell parsing fun.
* Well-Typed.Com: GHC, primops and exorcising GMP.
* Niklas Broberg: What's in a forall?. More than you might
* >>> Zsol: Visualizing the graphrewrite process behind Haskell.
Work on the visual-graphrewrite package.
* Eric Kow (kowey): testrunner for practical quickcheck.
* Sebastian Fischer: Explicit sharing of monadic effects. Purely
functional, lazy, non-deterministic programming!
* LHC Team: New backend.
* >>> James McNeill: Messing with Haskell.
* Dan Piponi (sigfpe): Hashing Molecules.
* Shin-Cheng Mu: Longest Segment Satisfying Suffix and
* David Amos: Simple graphs with Math.Combinatorics.Graph. David
shows off his Haskell for Maths library.
* Gergely Patai: More colourful graphs. Graphs from Gergely's
GSoC project on profiling.
* Bryan O'Sullivan: Case conversion and text 0.3. The text module
gets solid, standards-compliant case conversion.
* Bjorn Buckwalter: numtype 1.0: Type-level (low cardinality)
* >>> Jörn Dinkla: Parallelization with Haskell - Easy as can
Quotes of the Week
* sjanssen: in our sub-culture, "considered harmful" means "burn
it with fire"
* quicksilver: after all, anyone who insists on talking about himself
in the third person is clearly someone to be reckoned with.
About the Haskell Weekly News
New editions are posted to the Haskell mailing list as well as to
the Haskell Sequence and Planet Haskell. RSS is also
available, and headlines appear on haskell.org.
To help create new editions of this newsletter, please see the
information on how to contribute. Send stories to byorgey at cis
dot upenn dot edu. The darcs repository is available at darcs get
More information about the Haskell-Cafe