Welcome to the 217th issue of the HWN, a newsletter covering
developments in the Haskell community during the week of February 19 to
25, 2012.

You can find the HTML version of this issue at:
http://contemplatecode.blogspot.com/2012/02/haskell-weekly-news-issue-217.html

Quotes of the Week

   * nand`: oh, wait, ANSI is the physical layout

   * cmccann: some programmers have a problem to solve and think "I
     know, I need an existential type." now they have another problem,
     but can't solve it because all they know about it is that the
     problem exists.

   * Philippa: The only data type is Nat! (Which succs).

   * hpc: peano arithmetic SSSSZ life

   * cmccann: unicode snowman is a valid identifier in Haskell, BTW

   * Jafet: Haskell is an imperatively functional abstract enterprise
     programming language template

   * Cale: Array is immutable boxed
     Cale: UArray is immutable unboxed
     Cale: IOArray is mutable boxed
     elliott: IOUArray is an array of debts.

   * c_wraith: It [C] frees you to use whatever data structure you want,
     by providing you none!

   * Brandon Allbery: If you absolutely insist on shooting yourself in
     the foot this way in Haskell, it can be done; but there is no
     reason Haskell should make it *easy* to do so. That's C's
     superpower. :)

Top Reddit Stories

   * ANNOUNCE: Sodium, a new Haskell FRP (Reactive Programming) system
     Domain: hackage.haskell.org, Score: 41, Comments: 38
     On Reddit: [1] http://goo.gl/IY2a1
     Original: [2] http://goo.gl/OOpl1

   * Adventures in Parsec - Parsing logs in Haskell
     Domain: variadic.me, Score: 31, Comments: 24
     On Reddit: [3] http://goo.gl/pkHdy
     Original: [4] http://goo.gl/fDRdE

   * Wanted: an efficient union algorithm for hash-array mapped tries
     Domain: blog.johantibell.com, Score: 30, Comments: 13
     On Reddit: [5] http://goo.gl/p7n4c
     Original: [6] http://goo.gl/4XCui

   * How reliable is Hackage supposed to be?
     Domain: self.haskell, Score: 29, Comments: 20
     On Reddit: [7] http://goo.gl/qfqJ3
     Original: [8] http://goo.gl/qfqJ3

   * Mathematics in the Age of the Turing Machine -- I recommend starting in 
     section 2
     Domain: math.pitt.edu, Score: 28, Comments: 1
     On Reddit: [9] http://goo.gl/T4jGx
     Original: [10] http://goo.gl/9SmzX

   * Conduits: Simplifying ResourceT
     Domain: yesodweb.com, Score: 28, Comments: 6
     On Reddit: [11] http://goo.gl/PW0C2
     Original: [12] http://goo.gl/9a5Dz

   * Clarifying a mis-understanding about regions (and iteratees)
     Domain: haskell.org, Score: 27, Comments: 4
     On Reddit: [13] http://goo.gl/P3sVE
     Original: [14] http://goo.gl/WWjUb

   * Concatenative Haskell Part II: Custom DSL Syntax Using QuasiQuotes
     Domain: github.com, Score: 25, Comments: 6
     On Reddit: [15] http://goo.gl/DP0bY
     Original: [16] http://goo.gl/Lvlnc

   * Designing a serialization API
     Domain: blog.johantibell.com, Score: 24, Comments: 1
     On Reddit: [17] http://goo.gl/SFMTx
     Original: [18] http://goo.gl/vcdsS

   * Getting Started with Disciple Core
     Domain: disciple.ouroborus.net, Score: 19, Comments: 1
     On Reddit: [19] http://goo.gl/FCPla
     Original: [20] http://goo.gl/7J8oN

   * hs-logo: Logo turtle graphics interpreter written in Haskell
     Domain: deepakjois.github.com, Score: 18, Comments: 5
     On Reddit: [21] http://goo.gl/wRIqZ
     Original: [22] http://goo.gl/JE37a

   * The Simply-typed Lambda Calculus with Constraints
     Domain: flippac.wordpress.com, Score: 16, Comments: 3
     On Reddit: [23] http://goo.gl/ZNNB1
     Original: [24] http://goo.gl/QbT6a

   * Data Structure Agnostic JSON Serialization
     Domain: blog.melding-monads.com, Score: 14, Comments: 1
     On Reddit: [25] http://goo.gl/9QD9o
     Original: [26] http://goo.gl/WsPtb

Top StackOverflow Questions

   * Evaluation strategy
     votes: 19, answers: 4
     Read on SO: [27] http://goo.gl/rcJyz

   * Guards vs. if-then-else vs. cases in Haskell
     votes: 18, answers: 2
     Read on SO: [28] http://goo.gl/BmH0X

   * Division by zero in Haskell
     votes: 15, answers: 4
     Read on SO: [29] http://goo.gl/a0cER

   * Memory efficient strings in Haskell
     votes: 15, answers: 2
     Read on SO: [30] http://goo.gl/4kUdm

   * What prevents an efficient Haskell virtual machine (like JVM)?
     votes: 12, answers: 4
     Read on SO: [31] http://goo.gl/RphqH

   * Is indexing of Data.Vector.Unboxed.Mutable.MVector really this slow?
     votes: 11, answers: 2
     Read on SO: [32] http://goo.gl/72fhd

   * Haskell: filtering a heterogenous list by type
     votes: 10, answers: 2
     Read on SO: [33] http://goo.gl/uFm1I

   * ghci tab-completion in haskell-mode
     votes: 10, answers: 1
     Read on SO: [34] http://goo.gl/QaAo5

   * Non-maintainer uploads to Hackage
     votes: 10, answers: 2
     Read on SO: [35] http://goo.gl/lVFHN

   * withFile vs. openFile
     votes: 9, answers: 4
     Read on SO: [36] http://goo.gl/KQ6Fu


Until next time,
Daniel Santa Cruz

References

   1. http://hackage.haskell.org/package/sodium
   2. http://www.reddit.com/r/haskell/comments/pyxpx/announce_sodium_a_new_haskell_frp_reactive/
   3. http://variadic.me/posts/2012-02-24-adventures-in-parsec.html
   4. http://www.reddit.com/r/haskell/comments/q41rr/adventures_in_parsec_parsing_logs_in_haskell/
   5. http://blog.johantibell.com/2012/02/wanted-efficient-union-algorithm-for.html
   6. http://www.reddit.com/r/haskell/comments/q0a02/wanted_an_efficient_union_algorithm_for_hasharray/
   7. http://www.reddit.com/r/haskell/comments/pwjc9/how_reliable_is_hackage_supposed_to_be/
   8. http://www.reddit.com/r/haskell/comments/pwjc9/how_reliable_is_hackage_supposed_to_be/
   9. http://www.math.pitt.edu/~thales/papers/turing.pdf
  10. http://www.reddit.com/r/haskell/comments/pwx2b/mathematics_in_the_age_of_the_turing_machine_i/
  11. http://www.yesodweb.com/blog/2012/02/simplifying-resourcet
  12. http://www.reddit.com/r/haskell/comments/q37rf/conduits_simplifying_resourcet/
  13. http://www.haskell.org/pipermail/haskell-cafe/2012-February/099689.html
  14. http://www.reddit.com/r/haskell/comments/q293l/clarifying_a_misunderstanding_about_regions_and/
  15. https://github.com/leonidas/codeblog/blob/master/2012/2012-02-21-concatenative-haskell-ii-dsl.md
  16. http://www.reddit.com/r/haskell/comments/pzh53/concatenative_haskell_part_ii_custom_dsl_syntax/
  17. http://blog.johantibell.com/2012/02/designing-serialization-api.html
  18. http://www.reddit.com/r/haskell/comments/q0kcv/designing_a_serialization_api/
  19. http://disciple.ouroborus.net/wiki/Tutorial/Core
  20. http://www.reddit.com/r/haskell/comments/q1url/getting_started_with_disciple_core/
  21. http://deepakjois.github.com/hs-logo/
  22. http://www.reddit.com/r/haskell/comments/pzf9k/hslogo_logo_turtle_graphics_interpreter_written/
  23. http://flippac.wordpress.com/2012/02/23/the-simply-typed-lambda-calculus-with-constraints/
  24. http://www.reddit.com/r/haskell/comments/q2ga5/the_simplytyped_lambda_calculus_with_constraints/
  25. http://blog.melding-monads.com/2012/02/24/data-structure-agnostic-json-serialization/
  26. http://www.reddit.com/r/haskell/comments/q3t70/data_structure_agnostic_json_serialization/
  27. http://stackoverflow.com/questions/9439470/evaluation-strategy
  28. http://stackoverflow.com/questions/9345589/guards-vs-if-then-else-vs-cases-in-haskell
  29. http://stackoverflow.com/questions/9354016/division-by-zero-in-haskell
  30. http://stackoverflow.com/questions/9398572/memory-efficient-strings-in-haskell
  31. http://stackoverflow.com/questions/9352744/what-prevents-an-efficient-haskell-virtual-machine-like-jvm
  32. http://stackoverflow.com/questions/9409634/is-indexing-of-data-vector-unboxed-mutable-mvector-really-this-slow
  33. http://stackoverflow.com/questions/9396023/haskell-filtering-a-heterogenous-list-by-type
  34. http://stackoverflow.com/questions/9431779/ghci-tab-completion-in-haskell-mode
  35. http://stackoverflow.com/questions/9435513/non-maintainer-uploads-to-hackage
  36. http://stackoverflow.com/questions/9406463/withfile-vs-openfile