[Haskell-cafe] Haskell Weekly News: Issue 218

Fri Mar 16 02:56:46 CET 2012

Welcome to issue 218 of the HWN, an issue covering crowd-sourced bits
of information about Haskell from around the web. This issue cover the
weeks of February 26 to March 10, 2012.

You can find the HTML version at:
http://contemplatecode.blogspot.com/2012/03/haskell-weekly-news-issue-218.html

Quotes of the Week

   * monochrom: shapr is not "normal". he got a decent job, then went to
     school.

   * quicksilver: typeclasses are absolutely not sugar for a record of
                  functions
     quicksilver: they're unsugar.
     quicksilver: they're a benighted bitter poison.

   * edwardk: i'm not willing to give up orders of magnitude worth of
              performance to get a bad hack
     edwardk: if you want that, go code in scheme

   * (on pointless black magic)
     mgsloan: welcome to excessively pointless plumbing operators :)
     byorgey: mgsloan: that's... terrifying
     DanBurton: you should put it on hackage

   * cheater_: maybe you should try /part since we're talking about
     perfect-world situations

   * edwardk: i used to be a huge proponent of unicode syntax
     everywhere, then i used agda ;)

   * cmccann: free advice is, of course, any advice which satisfies the
     properties expected given the definition of "advice", but nothing
     further ;]

   * shachaf: "magic" is just another word for "primitive"

   * dylukes: I'm getting way more acquainted with the GHC build system
     than I'd like to be.

   * JoeyA: Inform7 is a programming language.
     A programming language tells a computer what to do.
     The computer is in a room.
     You are facing West.

   * mauke: sorry, the current time is not a constant
     lukish: It's a pity

   * dfletcher: > ((++" Batman!") . take 48 . cycle . show) (0/0)

Top Reddit Stories

   * New unordered-containers release improves performance by as much as
2x,
     using HAMTs
     Domain: blog.johantibell.com, Score: 64, Comments: 46
     On Reddit: [1] http://goo.gl/D6yTb
     Original:  [2] http://goo.gl/5YUph

   * A humble suggestion for visual pure functional programming
     Domain: i.imgur.com, Score: 59, Comments: 59
     On Reddit: [3] http://goo.gl/eUMrk
     Original:  [4] http://goo.gl/DSFnj

   * Spike: experimental web browser in Haskell
     Domain: self.haskell, Score: 53, Comments: 22
     On Reddit: [5] http://goo.gl/ZTR1j
     Original:  [6] http://goo.gl/ZTR1j

   * GHC 7.4.1 speeds up arbtt by a factor of 22
     Domain: joachim-breitner.de, Score: 51, Comments: 18
     On Reddit: [7] http://goo.gl/XVBDt
     Original:  [8] http://goo.gl/IL6EL

   * Eff 3.0 is out, a functional language with first-class computational
     effects and handlers (an alternative to monads)
     Domain: math.andrej.com, Score: 49, Comments: 12
     On Reddit: [9] http://goo.gl/1Idw0
     Original: [10] http://goo.gl/iwHlG

   * What's the most clever piece of Haskell code you know?
     Domain: self.haskell, Score: 47, Comments: 64
     On Reddit: [11] http://goo.gl/T1u9t
     Original:  [12] http://goo.gl/T1u9t

   * Diagrams 0.5 released: powerful, flexible embedded domain-specific
language
     for creating vector graphics
     Domain: byorgey.wordpress.com, Score: 40, Comments: 7
     On Reddit: [13] http://goo.gl/e75Yx
     Original:  [14] http://goo.gl/565c1

   * Faster Javascript Through Category Theory
     Domain: johnbender.us, Score: 39, Comments: 5
     On Reddit: [15] http://goo.gl/UgvTr
     Original:  [16] http://goo.gl/TLK4k

   * I'm writing a Haskell book. Almost finished the 3rd chapter. Would
like
     feedback.
     Domain: bit.ly, Score: 36, Comments: 48
     On Reddit: [17] http://goo.gl/AzwhR
     Original:  [18] http://goo.gl/AzwhR

   * Level 0 -- a Snake clone using SDL, with a nice interactive map editor
     Domain: quasimal.com, Score: 28, Comments: 5
     On Reddit: [19] http://goo.gl/x9gZk
     Original:  [20] http://goo.gl/meSPo

   * Parallel Haskell Digest 8: MVar, summer school, Simon PJ @ YOW, and
more
     Domain: well-typed.com, Score: 27, Comments: 1
     On Reddit: [21] http://goo.gl/MDzrI
     Original:  [22] http://goo.gl/OC6O6

   * Avoid cabal hell: find nirvana
     Domain: yesodweb.com, Score: 27, Comments: 30
     On Reddit: [23] http://goo.gl/ryd5e
     Original:  [24] http://goo.gl/Yyzqd

   * Improvements to HashMap and HashSet creation
     Domain: blog.johantibell.com, Score: 26, Comments: 1
     On Reddit: [25] http://goo.gl/yh2zs
     Original:  [26] http://goo.gl/u9uhg

   * The Day Python Embarassed Imperative Programming
     » What, then, Shall We Say?
     Domain: the-27th-comrade.appspot.com, Score: 25, Comments: 20
     On Reddit: [27] http://goo.gl/5KIOx
     Original:  [28] http://goo.gl/Wi47v

   * Improbable uses of unsafeCoerce
     Domain: gist.github.com, Score: 25, Comments: 25
     On Reddit: [29] http://goo.gl/cN0LE
     Original:  [30] http://goo.gl/cxfSc

Top StackOverflow Questions

   * Haskell: Lists, Arrays, Vectors, Sequences
     votes: 32, answers: 1
     Read on SO: [31] http://goo.gl/YHVpC

   * Why type classes in Haskell were difficult to implement?
     votes: 20, answers: 1
     Read on SO: [32] http://goo.gl/LoLHe

   * runST and function composition
     votes: 18, answers: 3
     Read on SO: [33] http://goo.gl/6NSvR

   * How do you compute the difference between successive elements of a
     list of unknown size, functionally?
     votes: 16, answers: 7
     Read on SO: [34] http://goo.gl/rnc8l

   * Do we care about the 'past' in FRP?
     votes: 16, answers: 1
     Read on SO: [35] http://goo.gl/oR2rd

   * “evaluate” function
     votes: 16, answers: 1
     Read on SO: [36] http://goo.gl/ShLMT

   * What's preferred among liftM, lilftA, etc
     votes: 15, answers: 1
     Read on SO: [37] http://goo.gl/y8apA

   * Name of type pattern: R a b = Q (a -> (R a b,b))
     votes: 14, answers: 3
     Read on SO: [38] http://goo.gl/kRMgn

   * Haskell offline documentation?
     votes: 12, answers: 2
     Read on SO: [39] http://goo.gl/Hih3z

   * Program design in Haskell: how to do simulation without mutability
     votes: 12, answers: 3
     Read on SO: [40] http://goo.gl/ODJjT

Until next time,
Daniel Santa Cruz

References

   1.
http://blog.johantibell.com/2012/03/announcing-unordered-containers-02.html
   2.
http://www.reddit.com/r/haskell/comments/ql9m5/new_unorderedcontainers_release_improves/
   3. http://i.imgur.com/TOZZZ.png
   4.
http://www.reddit.com/r/haskell/comments/q7m8i/a_humble_suggestion_for_visual_pure_functional/
   5.
http://www.reddit.com/r/haskell/comments/qhce6/spike_experimental_web_browser_in_haskell/
   6.
http://www.reddit.com/r/haskell/comments/qhce6/spike_experimental_web_browser_in_haskell/
   7.
http://www.joachim-breitner.de/blog/archives/546-GHC-7.4.1-speeds-up-arbtt-by-a-factor-of-22.html
   8.
http://www.reddit.com/r/haskell/comments/q86iw/ghc_741_speeds_up_arbtt_by_a_factor_of_22/
   9. http://math.andrej.com/eff/
  10.
http://www.reddit.com/r/haskell/comments/qosr7/eff_30_is_out_a_functional_language_with/
  11.
http://www.reddit.com/r/haskell/comments/qn7nk/whats_the_most_clever_piece_of_haskell_code_you/
  12.
http://www.reddit.com/r/haskell/comments/qn7nk/whats_the_most_clever_piece_of_haskell_code_you/
  13. http://byorgey.wordpress.com/2012/03/09/announcing-diagrams-0-5/
  14.
http://www.reddit.com/r/haskell/comments/qpkxb/diagrams_05_released_powerful_flexible_embedded/
  15.
http://johnbender.us/2012/02/29/faster-javascript-through-category-theory/
  16.
http://www.reddit.com/r/haskell/comments/qbuk8/faster_javascript_through_category_theory/
  17. http://bit.ly/xDsDSj
  18.
http://www.reddit.com/r/haskell/comments/qquc5/im_writing_a_haskell_book_almost_finished_the_3rd/
  19. http://quasimal.com/projects/level_0.html
  20.
http://www.reddit.com/r/haskell/comments/qcrhj/level_0_a_snake_clone_using_sdl_with_a_nice/
  21. http://www.well-typed.com/blog/64
  22.
http://www.reddit.com/r/haskell/comments/qefzt/parallel_haskell_digest_8_mvar_summer_school/
  23. http://www.yesodweb.com/blog/2012/03/cabal-nirvana
  24.
http://www.reddit.com/r/haskell/comments/qkqdj/avoid_cabal_hell_find_nirvana/
  25.
http://blog.johantibell.com/2012/03/improvements-to-hashmap-and-hashset.html
  26.
http://www.reddit.com/r/haskell/comments/qp7w1/improvements_to_hashmap_and_hashset_creation/
  27.
http://the-27th-comrade.appspot.com/blog/ahJzfnRoZS0yN3RoLWNvbXJhZGVyDAsSBUVudHJ5GOFdDA
  28.
http://www.reddit.com/r/haskell/comments/q7ykt/the_day_python_embarassed_imperative_programming/
  29. https://gist.github.com/1934179
  30.
http://www.reddit.com/r/haskell/comments/qadwm/improbable_uses_of_unsafecoerce/
  31.
http://stackoverflow.com/questions/9611904/haskell-lists-arrays-vectors-sequences
  32.
http://stackoverflow.com/questions/9602176/why-type-classes-in-haskell-were-difficult-to-implement
  33.
http://stackoverflow.com/questions/9468963/runst-and-function-composition
  34.
http://stackoverflow.com/questions/9512513/how-do-you-compute-the-difference-between-successive-elements-of-a-list-of-unkno
  35.
http://stackoverflow.com/questions/9526836/do-we-care-about-the-past-in-frp
  36. http://stackoverflow.com/questions/9553943/evaluate-function
  37.
http://stackoverflow.com/questions/9509350/whats-preferred-among-liftm-lilfta-etc
  38.
http://stackoverflow.com/questions/9487760/name-of-type-pattern-r-a-b-q-a-r-a-b-b
  39.
http://stackoverflow.com/questions/9454793/haskell-offline-documentation
  40.
http://stackoverflow.com/questions/9548913/program-design-in-haskell-how-to-do-simulation-without-mutability
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