[Haskell-cafe] Haskell Weekly News: Issue 121 - June 13, 2009

Brent Yorgey 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
   [1]Haskell community.


   purely functional lazy non-deterministic programming. Sebastian Fischer
   [2]announced the [3]explicit-sharing library, which supports lazy
   functional-logic programming in Haskell.

   nntp 0.0.1. Maciej Piechotka [4]announced the release of [5]nntp, a
   library to connect to nntp (i.e. mainly USENET) servers.

   OpenGLRaw Sven Panne [6]announced the release of [7]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 [8]announced [9]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 [10]announced the release of
   [11]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 [12]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 [13]announced [14]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
   test executable.

   serial-0.2. Frederick Ross [15]announced version 0.2 of [16]serial, a
   library for working with line-oriented POSIX serial ports.

   hunp-0.0. Deniz Dogan [17]announced [18]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 [19]announced a new
   release of [20]nemesis, a simple rake-like task management tool.

   Data.Reify.CSE. Sebastiaan Visser [21]announced the [22]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 [23]reminded anyone interested in attending [24]Hac phi that
   Monday 15 June is the deadline for getting a special reduced hotel

   alloy-1.0.0 (generic programming). Neil Brown [25]announced the
   [26]first release of the [27]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 [28]announced the release of [29]StrictBench, a library for
   timing full evaluation of values.

   haskeem 0.7.0 uploaded to hackage. Uwe Hollerbach [30]announced
   [31]haskeem, a small scheme interpreter written in Haskell.

   numtype 1.0 -- Type-level (low cardinality) integers. Bjorn Buckwalter
   [32]announced the [33]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 [34]Google Summer of

   space profiling. Gergely Patai has some [35]pretty graphs generated by
   his profiling library.

   haskell-src-exts. Niklas Broberg is [36]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 [37]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 [38]made some progress on some
   documentation, tracking down a performance regression, and other


   Adding an ignore function to Control.Monad. Gwern Branwen [39]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 [40]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 [41]post about implementing lightweight closed type
   classes in Haskell.

   who's up for a hackathon? (ICFP, late Aug, early Sept). Eric Kow
   [42]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 [43]announced that
   [44]Galois is hiring! See the announcement for more details.

Blog noise

   [45]Haskell news from the [46]blogosphere. Blog posts from people new
   to the Haskell community are marked with >>>, be sure to welcome them!
     * Niklas Broberg: [47]GSoC status report, week 3.
     * Joachim Breitner: [48]Introducing L-seed.
     * Conal Elliott: [49]Memoizing polymorphic functions - part two.
     * London Haskell Users Group: [50]Next Meeting: Sean Leather, Fun and
       generic things to do with EMGM.
     * David Amos: [51]It's on Hackage!. Haskell for Maths is now just a
       cabal-install away.
     * Michael Snoyman: [52]Filename encoding issues.
     * David Amos: [53]Permutation groups.
     * Edward Kmett: [54]Recursion Schemes: A Field Guide (Redux).
     * mightybyte: [55]Intro to HAppS-State.
     * Conal Elliott: [56]Memoizing polymorphic functions - part one.
     * Lennart Augustsson: [57]More LLVM.
     * Roman Cheplyaka: [58]Don't play with your monads.
     * Galois, Inc: [59]Tech Talk: Orc in Haskell.
     * Petr Rockai: [60]soc progress 3. Progress on Petr's GSoC darcs
     * Magnus Therning: [61]Using msmtp with darcs.
     * Erik de Castro Lopo: [62]Debian Maintainer. Erik is now a Debian
       maintainer, and plans to give Haskell on Debian a much-needed
     * Niklas Broberg: [63]What's in a forall?. More Haskell parsing fun.
     * Well-Typed.Com: [64]GHC, primops and exorcising GMP.
     * Niklas Broberg: [65]What's in a forall?. More than you might
     * >>> Zsol: [66]Visualizing the graphrewrite process behind Haskell.
       Work on the [67]visual-graphrewrite package.
     * Eric Kow (kowey): [68]testrunner for practical quickcheck.
     * Sebastian Fischer: [69]Explicit sharing of monadic effects. Purely
       functional, lazy, non-deterministic programming!
     * LHC Team: [70]New backend.
     * >>> James McNeill: [71]Messing with Haskell.
     * Dan Piponi (sigfpe): [72]Hashing Molecules.
     * Shin-Cheng Mu: [73]Longest Segment Satisfying Suffix and
       Overlap-Closed Predicates.
     * David Amos: [74]Simple graphs with Math.Combinatorics.Graph. David
       shows off his Haskell for Maths library.
     * Gergely Patai: [75]More colourful graphs. Graphs from Gergely's
       GSoC project on profiling.
     * Bryan O'Sullivan: [76]Case conversion and text 0.3. The text module
       gets solid, standards-compliant case conversion.
     * Bjorn Buckwalter: [77]numtype 1.0: Type-level (low cardinality)
     * >>> Jörn Dinkla: [78]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 [79]the Haskell mailing list as well as to
   [80]the Haskell Sequence and [81]Planet Haskell. [82]RSS is also
   available, and headlines appear on [83]haskell.org.

   To help create new editions of this newsletter, please see the
   information on [84]how to contribute. Send stories to byorgey at cis
   dot upenn dot edu. The darcs repository is available at darcs get
   [85]http://code.haskell.org/~byorgey/code/hwn/ .


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