Welcome to issue 301 of the HWN, an issue covering crowd-sourced bits of information about Haskell from around the web. This issue covers from July 27 to August 2, 2014 Quotes of the Week * bernalex: I used to have a problem then I used lens now I have an abstraction problem? * trap_exit: haskell is like the 'and they lived happily ever after' of programming languages Top Reddit Stories * The Comonad.Reader » Letter to a Young Haskell Enthusiast Domain: comonad.com, Score: 236, Comments: 56 Original: [1] http://goo.gl/Z5usp3 On Reddit: [2] http://goo.gl/CpPKnC * seL4 is now open source: the world's first end-to-end verified OS kernel Domain: github.com, Score: 87, Comments: 20 Original: [3] http://goo.gl/Uz50bj On Reddit: [4] http://goo.gl/EQK0MQ * FP Haskell Center now free for open projects Domain: fpcomplete.com, Score: 81, Comments: 23 Original: [5] http://goo.gl/ULc9ze On Reddit: [6] http://goo.gl/ZleWCk * -XOverlappingInstances and -XIncoherentInstances to be deprecated Domain: haskell.org, Score: 76, Comments: 64 Original: [7] http://goo.gl/dokkrY On Reddit: [8] http://goo.gl/0AyqA2 * First-Class "Statements": IO as data Domain: blog.jle.im, Score: 68, Comments: 32 Original: [9] http://goo.gl/JNj2D1 On Reddit: [10] http://goo.gl/h1v7yp * Foldable and Traversable in Haskell Domain: blog.jakubarnold.cz, Score: 61, Comments: 30 Original: [11] http://goo.gl/mgI6Mg On Reddit: [12] http://goo.gl/nvwj6j * Minimalist GUI toolkit in GHCi Domain: github.com, Score: 61, Comments: 7 Original: [13] http://goo.gl/9PvsUP On Reddit: [14] http://goo.gl/jQKyG7 * early adopters rejoyce! Haskell Platform 2014.2.0.0 Release Candidate 2 Domain: haskell.org, Score: 48, Comments: 27 Original: [15] http://goo.gl/AGl5po On Reddit: [16] http://goo.gl/ThS3Wc * The Modular, Functional Client Side Domain: stackbuilders.com, Score: 46, Comments: 3 Original: [17] http://goo.gl/eydkfz On Reddit: [18] http://goo.gl/z9q8hE * Beware of bracket Domain: ro-che.info, Score: 46, Comments: 18 Original: [19] http://goo.gl/UYA2mF On Reddit: [20] http://goo.gl/ksMQVV * Real World Haskell: Shipping "Carnival", a Blog Commenting Service Domain: robots.thoughtbot.com, Score: 44, Comments: 5 Original: [21] http://goo.gl/UmPyiL On Reddit: [22] http://goo.gl/4PRdpm * Flee traveller! Flee or you will be corrupted and devoured! Domain: github.com, Score: 41, Comments: 16 Original: [23] http://goo.gl/e3sA6X On Reddit: [24] http://goo.gl/RuAZ4o * Reading files from the /proc filesystem Domain: yesodweb.com, Score: 35, Comments: 4 Original: [25] http://goo.gl/mVfVyM On Reddit: [26] http://goo.gl/Bd2HBT * clckwrks CMS source now on github. A sad farewell to darcs and an optimistic look towards greater contributions from the community. Domain: clckwrks.com, Score: 33, Comments: 31 Original: [27] http://goo.gl/ZLqVWl On Reddit: [28] http://goo.gl/q0za2l * Introduction to GHC.TypeLits with base 4.7, including runtime conversion of symbols. Domain: ponies.io, Score: 32, Comments: 13 Original: [29] http://goo.gl/6FtdyO On Reddit: [30] http://goo.gl/PpmkOc * Converting Make to Shake Domain: neilmitchell.blogspot.com, Score: 23, Comments: 14 Original: [31] http://goo.gl/dOWVhV On Reddit: [32] http://goo.gl/cHYTmS * Learn Snap: Interactive Snap + Heist Examples Domain: learnsnap.chromaticleaves.com, Score: 21, Comments: 14 Original: [33] http://goo.gl/Opwt40 On Reddit: [34] http://goo.gl/06AneL * Hackage: ghc-server: A server interface to GHC. Domain: hackage.haskell.org, Score: 18, Comments: 14 Original: [35] http://goo.gl/ZjhScl On Reddit: [36] http://goo.gl/b9wBfP * Bloggy Badger: Homemade FRP: a study in following the types Domain: gelisam.blogspot.com, Score: 17, Comments: 1 Original: [37] http://goo.gl/T7ujN3 On Reddit: [38] http://goo.gl/HAV1mR Top StackOverflow Questions * IO/Monadic assign operator causing ghci to explode for infinite list votes: 16, answers: 1 Read on SO: [39] http://goo.gl/TC0Snn * A performance conundrum votes: 14, answers: 1 Read on SO: [40] http://goo.gl/b910ez * Does an unused let binding have any effect in Haskell? votes: 12, answers: 3 Read on SO: [41] http://goo.gl/KEl13j * In Haskell, are guards or matchers preferable? votes: 12, answers: 1 Read on SO: [42] http://goo.gl/LiXDjk * If MonadPlus is the “generator” class, then what is the “consumer” class? votes: 12, answers: 2 Read on SO: [43] http://goo.gl/eqRu3a * Why would using head/tail instead of pattern matching make evaluation terminate? votes: 12, answers: 3 Read on SO: [44] http://goo.gl/LOjX0V Until next time, [45]+Daniel Santa Cruz References 1. http://comonad.com/reader/2014/letter-to-a-young-haskell-enthusiast/ 2. http://www.reddit.com/r/haskell/comments/2cbbgf/the_comonadreader_letter_to_... 3. https://github.com/seL4/seL4 4. http://www.reddit.com/r/haskell/comments/2c1bnp/sel4_is_now_open_source_the_... 5. https://www.fpcomplete.com/business/blog/fp-haskell-center-going-free/ 6. http://www.reddit.com/r/haskell/comments/2c9u0g/fp_haskell_center_now_free_f... 7. http://www.haskell.org/pipermail/ghc-devs/2014-July/005830.html 8. http://www.reddit.com/r/haskell/comments/2c136i/xoverlappinginstances_and_xi... 9. http://blog.jle.im/entry/first-class-statements 10. http://www.reddit.com/r/haskell/comments/2byuhj/firstclass_statements_io_as_... 11. http://blog.jakubarnold.cz/2014/07/30/foldable-and-traversable.html 12. http://www.reddit.com/r/haskell/comments/2c8b87/foldable_and_traversable_in_... 13. https://github.com/divipp/lensref/wiki 14. http://www.reddit.com/r/haskell/comments/2cge6f/minimalist_gui_toolkit_in_gh... 15. http://www.haskell.org/pipermail/haskell/2014-July/024276.html 16. http://www.reddit.com/r/haskell/comments/2c0ep4/early_adopters_rejoyce_haske... 17. http://www.stackbuilders.com/news/the-modular-functional-client-side 18. http://www.reddit.com/r/haskell/comments/2c21j0/the_modular_functional_clien... 19. http://ro-che.info/articles/2014-07-30-bracket.html 20. http://www.reddit.com/r/haskell/comments/2c4li4/beware_of_bracket/ 21. http://robots.thoughtbot.com/ship-you-a-haskell 22. http://www.reddit.com/r/haskell/comments/2cfdms/real_world_haskell_shipping_... 23. https://github.com/haskell/bytestring/blob/2530b1c28f15d0f320a84701bf507d565... 24. http://www.reddit.com/r/haskell/comments/2cbgpz/flee_traveller_flee_or_you_w... 25. http://www.yesodweb.com/blog/2014/07/reading-files-proc-filesystem 26. http://www.reddit.com/r/haskell/comments/2buufk/reading_files_from_the_proc_... 27. http://www.clckwrks.com/page/view-page-slug/12/clckwrks-now-on-github 28. http://www.reddit.com/r/haskell/comments/2cd26w/clckwrks_cms_source_now_on_g... 29. http://ponies.io/posts/2014-07-30-typelits.html 30. http://www.reddit.com/r/haskell/comments/2c8bfi/introduction_to_ghctypelits_... 31. http://neilmitchell.blogspot.com/2014/07/converting-make-to-shake.html 32. http://www.reddit.com/r/haskell/comments/2bukaj/converting_make_to_shake/ 33. http://learnsnap.chromaticleaves.com/ 34. http://www.reddit.com/r/haskell/comments/2cdc36/learn_snap_interactive_snap_... 35. http://hackage.haskell.org/package/ghc-server-1.0 36. http://www.reddit.com/r/haskell/comments/2c17zz/hackage_ghcserver_a_server_i... 37. http://gelisam.blogspot.com/2014/07/homemade-frp-study-in-following-types.ht... 38. http://www.reddit.com/r/haskell/comments/2c0vg4/bloggy_badger_homemade_frp_a... 39. http://stackoverflow.com/questions/24986296/io-monadic-assign-operator-causi... 40. http://stackoverflow.com/questions/25089668/a-performance-conundrum 41. http://stackoverflow.com/questions/24984661/does-an-unused-let-binding-have-... 42. http://stackoverflow.com/questions/25000929/in-haskell-are-guards-or-matcher... 43. http://stackoverflow.com/questions/25070740/if-monadplus-is-the-generator-cl... 44. http://stackoverflow.com/questions/25078598/why-would-using-head-tail-instea... 45. https://plus.google.com/105107667630152149014/about