[Haskell-cafe] Haskell Weekly News: March 12, 2007

Donald Bruce Stewart dons at cse.unsw.edu.au
Sun Mar 11 22:52:21 EDT 2007

Haskell Weekly News
Issue 59 - March 12, 2007

   Welcome to issue 59 of HWN, a weekly newsletter covering developments
   in the [1]Haskell community.

   This week we see the 2007 Haskell Workshop announcement, Haskell.org's
   participation in the Google Summer of Code gets underway, and of
   course, new libraries!

   1. http://haskell.org/


   Google Summer of Code and Haskell.org. Malcolm Wallace [2]announced
   that Haskell.org has once again applied to be a mentoring organisation
   for the Google Summer of Code. If you are a student who would like to
   earn money hacking in Haskell, or you are a non-student who has a cool
   idea for a coding project but no time to do it yourself, then visit
   the [3]SoC wiki to gather ideas, and add yourself to the list of
   interested people! Add new ideas for projects!

   2. http://article.gmane.org/gmane.comp.lang.haskell.cafe/20232
   3. http://hackage.haskell.org/trac/summer-of-code

   Haskell Workshop Call for Papers. Gabriele Keller [4]announced the
   initial call for papers for the Haskell Workshop 2007, part of the
   2007 International Conference on Functional Programming (ICFP). The
   purpose of the Haskell Workshop is to discuss experience with Haskell,
   and possible future developments for the language. The scope of the
   workshop includes all aspects of the design, semantics, theory,
   application, implementation, and teaching of Haskell.

   4. http://article.gmane.org/gmane.comp.lang.haskell.general/14977

   Data.CompactString 0.3: Unicode ByteString. Twan van Laarhoven
   [5]announced version 0.3 of the Data.CompactString library.
   Data.CompactString is a wrapper around Data.ByteString supporting
   Unicode strings.

   5. http://article.gmane.org/gmane.comp.lang.haskell.general/14973

   harchive-0.2: backup and restore software in Haskell. David Brown
   [6]announced release 0.2 of [7]harchive, a program for backing up and
   restoring data. The package is available [8]from Hackage.

   6. http://article.gmane.org/gmane.comp.lang.haskell.general/14972
   7. http://www.davidb.org/darcs/harchive/
   8. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/harchive-0.2

   New release of regex packages. Chris Kuklewicz [9]announced new
   versions of the regex-* packages
   (base,compat,dfa,parsec,pcre,posix,tdfa,tre). There is a new [10]wiki
   page with documentation relating to these packages. All packages are
   available from [11]Hackage, under the [12]Text Category.

   9. http://article.gmane.org/gmane.comp.lang.haskell.cafe/20189
  10. http://haskell.org/haskellwiki/Regular_expressions
  11. http://hackage.haskell.org/packages/hackage.html
  12. http://hackage.haskell.org/packages/archive/pkg-list.html#cat:Text

   StaticDTD: type safe markup combinators from DTDs. Marcel Manthe
   [13]announced a tool that transforms a Document Type Definition to a
   library. The resulting library contains combinators that assure proper
   nesting of elements. The plan is to add more constraints that will
   also take care of the order of occurrence of children. The parsing of
   the DTD is done with HaXml. The code is [14]available via darcs.

  13. http://article.gmane.org/gmane.comp.lang.haskell.cafe/20218
  14. http://m13s07.vlinux.de/darcs/StaticDTD/

   IPv6 support for network package. Bryan O'Sullivan [15]announced that
   he'd added IPv6 support to the network package.

  15. http://thread.gmane.org/gmane.comp.lang.haskell.libraries/6363

   Type-level binary arithmetic library. Oleg Kiselyov and Chung-chieh
   Shan [16]announced a [17]new library for arbitrary precision binary
   arithmetic over natural kinds. The library supports
   addition/subtraction, predecessor/successor, multiplication/division,
   exp2, full comparisons, GCD, and the maximum. At the core of the
   library are multi-mode ternary relations Add and Mul where any two
   arguments determine the third. Such relations are especially suitable
   for specifying static arithmetic constraints on computations. The
   type-level numerals have no run-time representation; correspondingly,
   all arithmetic operations are done at compile time and have no effect
   on run-time.

  16. http://article.gmane.org/gmane.comp.lang.haskell.general/14961
  17. http://pobox.com/~oleg/ftp/Computation/resource-aware-prog/BinaryNumber.hs


   This section covers the [18]Haskell' standardisation process.

     * [19]Deriving Functor

  18. http://hackage.haskell.org/trac/haskell-prime
  19. http://thread.gmane.org/gmane.comp.lang.haskell.prime/2135


   This week's proposals and extensions to the [20]standard libraries.

     * [21]Add IPv6 support to network library
     * [22]Error handling conventions

  20. http://haskell.org/haskellwiki/Library_submissions
  21. http://thread.gmane.org/gmane.comp.lang.haskell.libraries/6377
  22. http://thread.gmane.org/gmane.comp.lang.haskell.libraries/6382


   Avoiding intermediate data structures. David Roundy [23]opened
   discussion on techniques for avoiding intermediate data structures in
   Haskell code

  23. http://thread.gmane.org/gmane.comp.lang.haskell.cafe/20319

   Maybe a different Maybe. Joachim Breitner [24]wondered about avoiding
   intermediate Maybe constructs

  24. http://thread.gmane.org/gmane.comp.lang.haskell.cafe/20300

Blog noise

   [25]Haskell news from the blogosphere.

     * [26]STM, IO, and a Simple Persistence Model
     * [27]Dynamic programming in Haskell
     * [28]Collected 'good math/bad math' Haskell articles
     * [29]3 open questions about monads
     * [30]Documentation, libraries and speed matter
     * [31]Why monads matter
     * [32]Design Patterns in Haskell: bracket
     * [33]Practical Haskell: shell scripting with error handling and privilege separation
     * [34]Simple socket programming
     * [35]'interact' for TCP sockets
     * [36]Monads in C, part 3
     * [37]Directory tree printing in Haskell. Part 2
     * [38]Monads through Pictures
     * [39]Notes on hacking Haskell
     * [40]Wanted: Haskell Programmer
     * [41]Why Publish CS Papers Without Code?
     * [42]The 8 ways to report errors in Haskell

  25. http://planet.haskell.org/
  26. http://mult.ifario.us/articles/2007/03/04/stm-and-io
  27. http://sequence.complete.org/node/263
  28. http://scienceblogs.com/goodmath/goodmath/programming/haskell/
  29. http://www.randomhacks.net/articles/2007/03/05/three-things-i-dont-understand-about-monads
  30. http://kawagner.blogspot.com/2007/03/why-do-most-people-seem-to-use-inferior.html
  31. http://www.rfc1149.net/blog/2007/03/06/why-monads-matter/
  32. http://notes-on-haskell.blogspot.com/2007/03/design-patterns-in-haskell-bracket.html
  33. http://cgi.cse.unsw.edu.au/~dons/blog/2007/03/06#programmable-semicolons
  34. http://metavar.blogspot.com/2007/03/simple-socket-programming.html
  35. http://stephan.walter.name/blog/computers/programming/haskell/interacttcp.html
  36. http://sigfpe.blogspot.com/2007/03/monads-in-c-pt-iii.html
  37. http://blog.moertel.com/articles/2007/03/07/directory-tree-printing-in-haskell-part-two-refactoring
  38. http://www.bolour.com/papers/monads-through-pictures.html
  39. http://metavar.blogspot.com/2007/03/haskell-hacking-notes-or-prelude-to.html
  40. http://blogs.teamb.com/craigstuntz/archive/2007/03/09/WantedHaskellDeveloper.aspx
  41. http://billmill.org/why_no_code
  42. http://www.randomhacks.net/articles/2007/03/10/haskell-8-ways-to-report-errors

Quotes of the Week

     * fishkandy: The problem with comparing apples to apples is that
       haskell has 'mango daiquiri' as a basic fruit

     * fax--: I wake up with a headache because of you, Haskell

     * norpan: I use functions, but i don't use them as arrows: I prefer
       silver bullets

     * ray: Some people claim everything is lisp. One time I was eating
       some spaghetti and someone came by and said: 'Hey, nice lisp
       dialect you're hacking in there'

     * roconnor: Damn it! Haskell pseudo code is indistinguishable from
       actual code

     * shapr: Today's nifty error message: *Main> thread
       blotttchhhkrrreeeedaaa dddinbbbdllleooofcccikkkneeeidddt

     * stepcut: C? isn't that some low-level language that compilers
       output to?

     * wkh: Why does the haskell webpage link to 'research papers' under
       the 'getting started' section?

Code Watch

   Tue Mar 6 06:31:12 PST 2007. Simon Marlow. [43]add noDuplicate#. This
   primop ensures that the current computation is not being duplicated,
   by calling threadPaused(). The idea is to use it inside
   unsafePerformIO/unsafeInterleaveIO (see #986).

  43. http://article.gmane.org/gmane.comp.lang.haskell.cvs.ghc/19536

About the Haskell Weekly News

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  44. http://www.haskell.org/mailman/listinfo/haskell
  45. http://sequence.complete.org/
  46. http://planet.haskell.org/
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  48. http://haskell.org/
  49. http://www.cse.unsw.edu.au/~dons/code/hwn/archives/20070312.pdf
  50. http://haskell.org/haskellwiki/HWN
  51. http://www.cse.unsw.edu.au/~dons/code/hwn

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