Welcome to issue 283 of the HWN, an issue covering crowd-sourced bits of information about Haskell from around the web. This issue covers the week of October 06 to 12, 2013. Quotes of the Week * elliott: haskell programs allocate a lot because they can't do much else * spj: [on pointfree style] It has a certain eccentric charm all of its own. * acowley: When we pick a random number, we stick to it. Top Reddit Stories * Simon Peyton Jones on Lenses at the Haskell eXchange Skillscast now available! Domain: skillsmatter.com, Score: 127, Comments: 107 On Reddit: [1] http://goo.gl/V6J6dR Original: [2] http://goo.gl/Kc1zEf * Why I don’t like the lens library Domain: fvisser.nl, Score: 99, Comments: 104 On Reddit: [3] http://goo.gl/Xz6p6C Original: [4] http://goo.gl/ZzxSOU * Cartesian Closed Comic #23: Picking a lens library Domain: ro-che.info, Score: 85, Comments: 8 On Reddit: [5] http://goo.gl/mXXUQw Original: [6] http://goo.gl/Bi2UIW * The core flaw of pipes and conduit Domain: yesodweb.com, Score: 45, Comments: 101 On Reddit: [7] http://goo.gl/tfSZ2Z Original: [8] http://goo.gl/5CpF2I * How to reimplement the conduit parsing API in pipes Domain: haskellforall.com, Score: 43, Comments: 16 On Reddit: [9] http://goo.gl/xQ9f93 Original: [10] http://goo.gl/iqFxfs * pipes resource problems Domain: yesodweb.com, Score: 40, Comments: 74 On Reddit: [11] http://goo.gl/9FpIwz Original: [12] http://goo.gl/tj0LbW * Beginners cheatsheet to the lens library Domain: haskell.org, Score: 40, Comments: 59 On Reddit: [13] http://goo.gl/I2i2or Original: [14] http://goo.gl/Y8znDQ * Demo: Ariadne, go-to-definition for Haskell Domain: youtube.com, Score: 39, Comments: 35 On Reddit: [15] http://goo.gl/KC1D5m Original: [16] http://goo.gl/0lqLPh * Do Extraterrestrials Use Functional Programming? Domain: justtesting.org, Score: 39, Comments: 39 On Reddit: [17] http://goo.gl/FZos1f Original: [18] http://goo.gl/RaIEZF * Haskell for all: Manual proofs for the `pipes` laws Domain: haskellforall.com, Score: 37, Comments: 55 On Reddit: [19] http://goo.gl/rhLmBC Original: [20] http://goo.gl/cmiDln * Unique PDFs linked in #haskell Domain: ircbrowse.net, Score: 36, Comments: 13 On Reddit: [21] http://goo.gl/mNNkM7 Original: [22] http://goo.gl/7Sj2si * Andres Löh on free monads Domain: skillsmatter.com, Score: 36, Comments: 15 On Reddit: [23] http://goo.gl/2sRcxC Original: [24] http://goo.gl/fvLiRn * Simpler conduit core (aka part 3 of 3) Domain: fpcomplete.com, Score: 36, Comments: 23 On Reddit: [25] http://goo.gl/V3FutZ Original: [26] http://goo.gl/4qYkRj * Proposal for Applicative do-notation Domain: ghc.haskell.org, Score: 36, Comments: 50 On Reddit: [27] http://goo.gl/skxmph Original: [28] http://goo.gl/st8iOp * So I (kind of) made a Haskell clone of the business card Ray Tracer Domain: github.com, Score: 35, Comments: 14 On Reddit: [29] http://goo.gl/tZZMnH Original: [30] http://goo.gl/G1hzjt * Call to Action - Fay FFI Bindings for AngularJS Domain: haskell.org, Score: 35, Comments: 16 On Reddit: [31] http://goo.gl/en6th1 Original: [32] http://goo.gl/g5T8TJ * The Haxl project at Facebook: concise, efficient access to diverse data sources Domain: skillsmatter.com, Score: 34, Comments: 9 On Reddit: [33] http://goo.gl/vEKNKb Original: [34] http://goo.gl/HKaMmn * Rethinking Supercompilation [PDF] Domain: community.haskell.org, Score: 34, Comments: 17 On Reddit: [35] http://goo.gl/IVwvdi Original: [36] http://goo.gl/BuaaXW * Musings on Lens Domain: gist.io, Score: 31, Comments: 9 On Reddit: [37] http://goo.gl/akld2Z Original: [38] http://goo.gl/CdPtlT Top StackOverflow Questions * Functions of possibly cyclic data structures votes: 12, answers: 1 Read on SO: [39] http://goo.gl/SBPV2t * How can I improve my understanding of the Haskell Type system? votes: 11, answers: 2 Read on SO: [40] http://goo.gl/HLsynN * Haskell: how to tell hlint not to: `Warning: Use string literal` votes: 7, answers: 1 Read on SO: [41] http://goo.gl/pf5d5O * How are uncurry and fanin related in category theory? votes: 7, answers: 1 Read on SO: [42] http://goo.gl/mo9150 * Haskell Iterate over 2d list, filter, output 1d list votes: 7, answers: 6 Read on SO: [43] http://goo.gl/h47C9e * Haskell why does “Num x” require “Show x”? votes: 7, answers: 3 Read on SO: [44] http://goo.gl/ORddsf * How to avoid creating an orphan FromJSON instance for Data.Tree votes: 7, answers: 1 Read on SO: [45] http://goo.gl/5MAI2k * State Monad with multiple state values votes: 6, answers: 3 Read on SO: [46] http://goo.gl/iuutId * Difference between Print and putStrLn in Haskell votes: 6, answers: 2 Read on SO: [47] http://goo.gl/GqUunm Until next time, [48]+Daniel Santa Cruz References 1. http://skillsmatter.com/podcast/scala/lenses-compositional-data-access-and-m... 2. http://www.reddit.com/r/haskell/comments/1o1z8x/simon_peyton_jones_on_lenses... 3. http://fvisser.nl/post/2013/okt/11/why-i-dont-like-the-lens-library.html 4. http://www.reddit.com/r/haskell/comments/1o6iqs/why_i_dont_like_the_lens_lib... 5. http://ro-che.info/ccc/23 6. http://www.reddit.com/r/haskell/comments/1obeom/cartesian_closed_comic_23_pi... 7. http://www.yesodweb.com/blog/2013/10/core-flaw-pipes-conduit 8. http://www.reddit.com/r/haskell/comments/1o1ink/the_core_flaw_of_pipes_and_c... 9. http://www.haskellforall.com/2013/10/how-to-reimplement-conduit-parsing-api.... 10. http://www.reddit.com/r/haskell/comments/1o3viw/how_to_reimplement_the_condu... 11. http://www.yesodweb.com/blog/2013/10/pipes-resource-problems 12. http://www.reddit.com/r/haskell/comments/1nw7ji/pipes_resource_problems/ 13. http://www.haskell.org/haskellwiki/LensBeginnersCheatsheet 14. http://www.reddit.com/r/haskell/comments/1oa9qx/beginners_cheatsheet_to_the_... 15. https://www.youtube.com/watch?v=-sbGijbhxAc 16. http://www.reddit.com/r/haskell/comments/1nvauj/demo_ariadne_gotodefinition_... 17. http://justtesting.org/post/63457249417/here-is-the-video-of-my-yow-lambda-j... 18. http://www.reddit.com/r/haskell/comments/1nz5j5/do_extraterrestrials_use_fun... 19. http://www.haskellforall.com/2013/10/manual-proofs-for-pipes-laws.html 20. http://www.reddit.com/r/haskell/comments/1nw7yt/haskell_for_all_manual_proof... 21. http://ircbrowse.net/pdfs/haskell/unique 22. http://www.reddit.com/r/haskell/comments/1o23nf/unique_pdfs_linked_in_haskel... 23. http://skillsmatter.com/podcast/scala/monads-for-free 24. http://www.reddit.com/r/haskell/comments/1o38fa/andres_l%C3%B6h_on_free_mona... 25. https://www.fpcomplete.com/user/snoyberg/blog-posts/simpler-conduit-core 26. http://www.reddit.com/r/haskell/comments/1o494w/simpler_conduit_core_aka_par... 27. http://ghc.haskell.org/trac/ghc/wiki/ApplicativeDo 28. http://www.reddit.com/r/haskell/comments/1o7lpm/proposal_for_applicative_don... 29. https://github.com/RommelVR/RayTracer 30. http://www.reddit.com/r/haskell/comments/1nuhze/so_i_kind_of_made_a_haskell_... 31. http://www.haskell.org/pipermail/haskell-cafe/2013-October/218522.html 32. http://www.reddit.com/r/haskell/comments/1o4x3m/call_to_action_fay_ffi_bindi... 33. http://skillsmatter.com/podcast/home/simon-marlow 34. http://www.reddit.com/r/haskell/comments/1o2mqe/the_haxl_project_at_facebook... 35. http://community.haskell.org/~ndm/temp/supero.pdf 36. http://www.reddit.com/r/haskell/comments/1o8ksw/rethinking_supercompilation_... 37. http://gist.io/6923187 38. http://www.reddit.com/r/haskell/comments/1o63ww/musings_on_lens/ 39. http://stackoverflow.com/questions/19337153/functions-of-possibly-cyclic-dat... 40. http://stackoverflow.com/questions/19247753/how-can-i-improve-my-understandi... 41. http://stackoverflow.com/questions/19237695/haskell-how-to-tell-hlint-not-to... 42. http://stackoverflow.com/questions/19262581/how-are-uncurry-and-fanin-relate... 43. http://stackoverflow.com/questions/19308845/haskell-iterate-over-2d-list-fil... 44. http://stackoverflow.com/questions/19327792/haskell-why-does-num-x-require-s... 45. http://stackoverflow.com/questions/19336569/how-to-avoid-creating-an-orphan-... 46. http://stackoverflow.com/questions/19227418/state-monad-with-multiple-state-... 47. http://stackoverflow.com/questions/19288652/difference-between-print-and-put... 48. https://plus.google.com/105107667630152149014/about