Welcome to issue 231 of the HWN, an issue covering crowd-sourced bits of information about Haskell from around the web. This issue covers the week of June 03 to 09, 2012. Announcements Paolo Capriotti announced the patchlevel release of GHC 7.4.2. "This release contains a number of bugfixes relative to 7.4.1, so we recommend upgrading." [1] http://goo.gl/X3Z85 Quotes of the Week * roconnor: there's a right way, and a wrong way, and then there is the ekmett way. Top Reddit Stories * Haskell Platform 2012.2.0.0 released Domain: hackage.haskell.org, Score: 104, Comments: 33 On Reddit: [2] http://goo.gl/ZNa9h Original: [3] http://goo.gl/JjJg2 * Why free monads matter Domain: haskellforall.com, Score: 61, Comments: 47 On Reddit: [4] http://goo.gl/hfKlc Original: [5] http://goo.gl/JPpsp * 3 Flavors of MVar: Lock, Var, Barrier Domain: neilmitchell.blogspot.com, Score: 43, Comments: 20 On Reddit: [6] http://goo.gl/3eEkO Original: [7] http://goo.gl/ek7Qq * Introducing the HERMIT Equational Reasoning Framework Domain: ittc.ku.edu, Score: 36, Comments: 20 On Reddit: [8] http://goo.gl/UC0sF Original: [9] http://goo.gl/ifS7f * Complicating conduit? Domain: yesodweb.com, Score: 35, Comments: 45 On Reddit: [10] http://goo.gl/W4rfE Original: [11] http://goo.gl/rU0vK * Beautiful Code, Compelling Evidence: OpenGL, Cairo tutorial [PDF, 33 pages] Domain: renci.org, Score: 33, Comments: 2 On Reddit: [12] http://goo.gl/qKY8w Original: [13] http://goo.gl/r5SVj * Forklift - a pattern for performing monadic actions in a worker thread Domain: apfelmus.nfshost.com, Score: 30, Comments: 7 On Reddit: [14] http://goo.gl/B6brV Original: [15] http://goo.gl/mWVAv * Dependently typed programming with singletons (Eisenberg, Weirich)[PDF] Domain: cis.upenn.edu, Score: 29, Comments: 3 On Reddit: [16] http://goo.gl/y3fYv Original: [17] http://goo.gl/RqM5m * Continuation-based relative-time FRP Domain: paolocapriotti.com, Score: 22, Comments: 6 On Reddit: [18] http://goo.gl/CFSK7 Original: [19] http://goo.gl/cP0cJ * Explaining the Prompt monad with a clearer representation Domain: joeysmandatory.blogspot.com, Score: 21, Comments: 42 On Reddit: [20] http://goo.gl/ZZM93 Original: [21] http://goo.gl/Im7SF * Lazily Evaluate length of a list Domain: self.haskell, Score: 21, Comments: 29 On Reddit: [22] http://goo.gl/cKUOt Original: [23] http://goo.gl/cKUOt Top StackOverflow Questions * Killing a thread when MVar is garbage collected votes: 22, answers: 4 Read on SO: [24] http://goo.gl/cvoqw * How does one write efficient Dynamic Programming algorithms in Haskell? votes: 16, answers: 3 Read on SO: [25] http://goo.gl/mkMTp * How to apply a polymorphic function to a Dynamic value votes: 11, answers: 1 Read on SO: [26] http://goo.gl/3jIVr * Haskell Typeclass for Tuples votes: 11, answers: 3 Read on SO: [27] http://goo.gl/pvDah * Monadic expressions in conditionals - GHC compiles, cabal refuses votes: 10, answers: 2 Read on SO: [28] http://goo.gl/QXMXh * GHC Optimization: Collatz conjecture votes: 10, answers: 2 Read on SO: [29] http://goo.gl/AfiEC * Haskell: Lists vs Streams votes: 10, answers: 3 Read on SO: [30] http://goo.gl/qn1dE * Is my program Turing-complete? votes: 9, answers: 2 Read on SO: [31] http://goo.gl/PLf5q * How to find the optimal processing order? votes: 9, answers: 1 Read on SO: [32] http://goo.gl/P3XZ2 * How to do fast data deserialization in Haskell votes: 9, answers: 1 Read on SO: [33] http://goo.gl/Synm2 * What's so bad about OverlappingInstances? votes: 9, answers: 1 Read on SO: [34] http://goo.gl/M17Rp Until next time, Daniel Santa Cruz References 1. http://permalink.gmane.org/gmane.comp.lang.haskell.glasgow.user/22181 2. http://hackage.haskell.org/platform/?2012.2.0.0 3. http://www.reddit.com/r/haskell/comments/uipvz/haskell_platform_2012200_rele... 4. http://www.haskellforall.com/2012/06/you-could-have-invented-free-monads.htm... 5. http://www.reddit.com/r/haskell/comments/utxq2/why_free_monads_matter/ 6. http://neilmitchell.blogspot.com/2012/06/flavours-of-mvar_04.html 7. http://www.reddit.com/r/haskell/comments/uk9wu/3_flavors_of_mvar_lock_var_ba... 8. http://www.ittc.ku.edu/csdlblog/?p=105 9. http://www.reddit.com/r/haskell/comments/ujdet/introducing_the_hermit_equati... 10. http://www.yesodweb.com/blog/2012/06/complicating-conduit 11. http://www.reddit.com/r/haskell/comments/urc75/complicating_conduit/ 12. http://www.renci.org/wp-content/pub/tutorials/BeautifulCode.pdf 13. http://www.reddit.com/r/haskell/comments/uqc33/beautiful_code_compelling_evi... 14. http://apfelmus.nfshost.com/blog/2012/06/07-forklift.html 15. http://www.reddit.com/r/haskell/comments/uq44h/forklift_a_pattern_for_perfor... 16. http://www.cis.upenn.edu/~eir/papers/2012/singletons/paper.pdf 17. http://www.reddit.com/r/haskell/comments/uic9g/dependently_typed_programming... 18. http://paolocapriotti.com/blog/2012/06/04/continuation-based-relative-time-f... 19. http://www.reddit.com/r/haskell/comments/uklsq/continuationbased_relativetim... 20. http://joeysmandatory.blogspot.com/2012/06/explaining-prompt-monad-with-simp... 21. http://www.reddit.com/r/haskell/comments/unpaz/explaining_the_prompt_monad_w... 22. http://www.reddit.com/r/haskell/comments/uomz4/lazily_evaluate_length_of_a_l... 23. http://www.reddit.com/r/haskell/comments/uomz4/lazily_evaluate_length_of_a_l... 24. http://stackoverflow.com/questions/10871303/killing-a-thread-when-mvar-is-ga... 25. http://stackoverflow.com/questions/10906053/how-does-one-write-efficient-dyn... 26. http://stackoverflow.com/questions/10889682/how-to-apply-a-polymorphic-funct... 27. http://stackoverflow.com/questions/10899804/haskell-typeclass-for-tuples 28. http://stackoverflow.com/questions/10867300/monadic-expressions-in-condition... 29. http://stackoverflow.com/questions/10876110/ghc-optimization-collatz-conject... 30. http://stackoverflow.com/questions/10942450/haskell-lists-vs-streams 31. http://stackoverflow.com/questions/10878846/is-my-program-turing-complete 32. http://stackoverflow.com/questions/10879838/how-to-find-the-optimal-processi... 33. http://stackoverflow.com/questions/10902405/how-to-do-fast-data-deserializat... 34. http://stackoverflow.com/questions/10942136/whats-so-bad-about-overlappingin...