Welcome to issue 314 of the HWN, an issue covering crowd-sourced bits

of information about Haskell from around the web. This issue covers

from December 7, 2014 to January 3, 2015

I know... I know. It's been a while

Quotes of the Week

   * arianvp__: after 5 hours of hacking my code works || now its 3 am

      || Types make a lot more sense when I'm tired for some reason

   * dmwit: "Any coder worth his salt can do the impossible."

   * hodapp: Math is too hard. Let's use JavaScript.

   * Zemyla: I imagine if [Edward Kmett] had found C++, he would be

          writing template definitions that would make the faces of the Boost

          team melt off.

Top Reddit Stories

   * Kronos Haskell Notebook (Mac App)

     Domain: kronosnotebook.com, Score: 114, Comments: 21

     Original: [1] http://goo.gl/nOnLuz

     On Reddit: [2] http://goo.gl/SNLxjo

   * The "What Are Monads?" Fallacy

     Domain: two-wrongs.com, Score: 112, Comments: 93

     Original: [3] http://goo.gl/Beu6wO

     On Reddit: [4] http://goo.gl/CxcK1f

   * Learn You Some Algebras for Glorious Good! - A fun,

     easy-to-read math textbook.

     Domain: self.haskell, Score: 109, Comments: 106

     Original: [5] http://goo.gl/3623n6

     On Reddit: [6] http://goo.gl/3623n6

   * GHC illustrated [PDF]

     Domain: takenobu-hs.github.io, Score: 108, Comments: 30

     Original: [7] http://goo.gl/yj7ySL

     On Reddit: [8] http://goo.gl/sro7qH

   * The Haskell Cast #9 - Conal Elliott on FRP and Denotational Design

     Domain: haskellcast.com, Score: 94, Comments: 34

     Original: [9] http://goo.gl/tls8K3

     On Reddit: [10] http://goo.gl/NIJZ1X

   * GHC 7.10.1 will support 'static values', allowing you to create stable

     references to values across programs/machines for serialization, RPC, etc...

     Domain: phabricator.haskell.org, Score: 91, Comments: 26

     Original: [11] http://goo.gl/bsfROl

     On Reddit: [12] http://goo.gl/weGkIq

   * 24 Days of GHC Extensions: Thanks!

     Domain: ocharles.org.uk, Score: 82, Comments: 11

     Original: [13] http://goo.gl/6ee2Jb

     On Reddit: [14] http://goo.gl/CYoai5

   * git clone in Haskell from the bottom up

     Domain: stefan.saasen.me, Score: 81, Comments: 9

     Original: [15] http://goo.gl/nWSXV

     On Reddit: [16] http://goo.gl/ULS3YO

   * A commentary on 24 days of GHC extensions

     Domain: augustss.blogspot.com, Score: 78, Comments: 5

     Original: [17] http://goo.gl/C4nKNN

     On Reddit: [18] http://goo.gl/cGBdss

   * Haskell for all: A very general API for relational joins

     Domain: haskellforall.com, Score: 77, Comments: 29

     Original: [19] http://goo.gl/WVGtQl

     On Reddit: [20] http://goo.gl/8McEkB

   * Elm 0.14 - Simpler Core, Better Tools

     Domain: elm-lang.org, Score: 76, Comments: 38

     Original: [21] http://goo.gl/7Oq4Xe

     On Reddit: [22] http://goo.gl/e9wbAm

   * Rethinking webservice and APIs in Haskell: servant 0.2

     Domain: alpmestan.com, Score: 74, Comments: 59

     Original: [23] http://goo.gl/Jl2CMS

     On Reddit: [24] http://goo.gl/HsB5zi

   * ANNOUNCE: GHC 7.10.1 Release Candidate 1

     Domain: permalink.gmane.org, Score: 74, Comments: 4

     Original: [25] http://goo.gl/I9ezar

     On Reddit: [26] http://goo.gl/SRNHG9

   * 24 Days of GHC Extensions: Rank N Types

     Domain: ocharles.org.uk, Score: 69, Comments: 27

     Original: [27] http://goo.gl/1OuyNg

     On Reddit: [28] http://goo.gl/5m79zT

   * A Haskell Implementation Reading List

     Domain: stephendiehl.com, Score: 66, Comments: 0

     Original: [29] http://goo.gl/YnFyTs

     On Reddit: [30] http://goo.gl/3TudIF

   * Learning Curves for different programming languages (including Haskell)

     Domain: github.com, Score: 66, Comments: 106

     Original: [31] http://goo.gl/SxsT10

     On Reddit: [32] http://goo.gl/KNsLqh

   * Functional Education

     Domain: bitemyapp.com, Score: 66, Comments: 10

     Original: [33] http://goo.gl/f4EI02

     On Reddit: [34] http://goo.gl/wDxjkj

   * Snowdrift.coop hiring lead programmer (Haskell/Yesod)

     Domain: snowdrift.coop, Score: 65, Comments: 8

     Original: [35] http://goo.gl/Nh0GL2

     On Reddit: [36] http://goo.gl/8tLsy8

   * 24 Days of GHC Extensions: Functional Dependencies

     Domain: ocharles.org.uk, Score: 58, Comments: 4

     Original: [37] http://goo.gl/mBkf8n

     On Reddit: [38] http://goo.gl/uv3Mhs

   * So you want to learn type theory... but where to start?

     Here are some suggestions.

     Domain: purelytheoretical.com, Score: 58, Comments: 9

     Original: [39] http://goo.gl/z73MMM

     On Reddit: [40] http://goo.gl/9AuJJl

   * 24 Days of Hackage: Static Pointers (guest post by Mathieu Boespflug)

     Domain: ocharles.org.uk, Score: 57, Comments: 32

     Original: [41] http://goo.gl/4mhlNL

     On Reddit: [42] http://goo.gl/jsSYr9

   * 24 Days of GHC Extensions: Type Families

     Domain: ocharles.org.uk, Score: 56, Comments: 11

     Original: [43] http://goo.gl/uwLBsA

     On Reddit: [44] http://goo.gl/ykn06l

   * 24 Days of GHC Extensions: Nullary Type Classes

     Domain: ocharles.org.uk, Score: 54, Comments: 23

     Original: [45] http://goo.gl/4k5bQw

     On Reddit: [46] http://goo.gl/crIJbb

   * 24 Days of GHC Extensions: DeriveGeneric

     Domain: ocharles.org.uk, Score: 54, Comments: 27

     Original: [47] http://goo.gl/gKijr1

     On Reddit: [48] http://goo.gl/SRMNuR

   * 24 Days of GHC Extensions: Existential Quantification

     (guest post by Roman Cheplyaka)

     Domain: ocharles.org.uk, Score: 54, Comments: 0

     Original: [49] http://goo.gl/wXwsDU

     On Reddit: [50] http://goo.gl/vLaS92

   * 24 Days of GHC Extensions: Multi-parameter Type Classes

     Domain: ocharles.org.uk, Score: 52, Comments: 11

     Original: [51] http://goo.gl/2sWnsC

     On Reddit: [52] http://goo.gl/h4mRBb

   * A demo written in Haskell got 3rd place in Experience

     Domain: youtube.com, Score: 48, Comments: 37

     Original: [53] http://goo.gl/9l7B6h

     On Reddit: [54] http://goo.gl/8Np97P

   * 24 Days of GHC Extensions: Overloaded Strings

     Domain: ocharles.org.uk, Score: 48, Comments: 23

     Original: [55] http://goo.gl/u6aiAi

     On Reddit: [56] http://goo.gl/Xtww0S

   * Intro to Machines & Arrows (Part 1: Stream and Auto)

     Domain: blog.jle.im, Score: 48, Comments: 25

     Original: [57] http://goo.gl/MwouKm

     On Reddit: [58] http://goo.gl/934frV

   * 24 Days of GHC Extensions: Recursive Do

     Domain: ocharles.org.uk, Score: 47, Comments: 7

     Original: [59] http://goo.gl/iejmP8

     On Reddit: [60] http://goo.gl/H8uEQS

   * 24 Days of GHC Extensions: Scoped Type Variables (guest post by Tim Docker)

     Domain: ocharles.org.uk, Score: 47, Comments: 18

     Original: [61] http://goo.gl/sWS0dT

     On Reddit: [62] http://goo.gl/jFPZAC

   * ANNOUNCE: GHC version 7.8.4

     Domain: permalink.gmane.org, Score: 47, Comments: 19

     Original: [63] http://goo.gl/0ygVbv

     On Reddit: [64] http://goo.gl/2eWUsJ

   * Categories Great and Small (From Bartosz Milewski's Categories for

     Programmers series)

     Domain: bartoszmilewski.com, Score: 46, Comments: 8

     Original: [65] http://goo.gl/NfpA7X

     On Reddit: [66] http://goo.gl/ghq472

   * Denotational design does not work

     Domain: ro-che.info, Score: 45, Comments: 39

     Original: [67] http://goo.gl/8hOm0A

     On Reddit: [68] http://goo.gl/tf4JVc

Top StackOverflow Questions

   * What is happening when I compose * with + in Haskell?

     votes: 35, answers: 5

     Read on SO: [69] http://goo.gl/S9h6Xi

   * Difference in performance of compiled accelerate code ran from

     ghci and shell

     votes: 22, answers: 0

     Read on SO: [70] http://goo.gl/zxojbX

   * Why does this Haskell program diverge?

     votes: 20, answers: 1

     Read on SO: [71] http://goo.gl/NDasIA

   * Is it possible to skip the nursery?

     votes: 20, answers: 1

     Read on SO: [72] http://goo.gl/Qk4K5i

   * Haskell performance implementing unix's “cat” program with Data.ByteString

     votes: 19, answers: 3

     Read on SO: [73] http://goo.gl/ekoeor

   * showsPrec and operator precedences

     votes: 15, answers: 1

     Read on SO: [74] http://goo.gl/ifxaUB

   * Why does let y = 1 + y compile, and what does it mean?

     votes: 15, answers: 1

     Read on SO: [75] http://goo.gl/vp1Q02

   * Type Family Shenanigans in GHCi

     votes: 13, answers: 1

     Read on SO: [76] http://goo.gl/fvJzzO

   * Quirkiness in Haskell 7.8.3

     votes: 13, answers: 1

     Read on SO: [77] http://goo.gl/KprcEM

   * What is the difference between value constructors and tuples?

     votes: 11, answers: 2

     Read on SO: [78] http://goo.gl/5ybmYY

   * Efficient version of 'inits'

     votes: 11, answers: 2

     Read on SO: [79] http://goo.gl/Qwoirp

   * Working out the details of a type indexed free monad

     votes: 11, answers: 7

     Read on SO: [80] http://goo.gl/oMjYQn

   * How to model a currencies, money, and banks that exchange money between

     currencies?

     votes: 10, answers: 3

     Read on SO: [81] http://goo.gl/svZY2T

   * Why are these functions differently evaluated

     votes: 10, answers: 2

     Read on SO: [82] http://goo.gl/nrD5pA

   * Why does a more general type affect runtime in Haskell?

     votes: 10, answers: 2

     Read on SO: [83] http://goo.gl/oVeQKg

   * List based on right Kan extension

     votes: 9, answers: 2

     Read on SO: [84] http://goo.gl/VxPhv0

   * How to inject the result of an IO action into a non-IO monadic computation

     votes: 9, answers: 3

     Read on SO: [85] http://goo.gl/WzrvDP

   * Why I get the “class Num a where” instead of the

     “class (Eq a, Show a) => Num a”?

     votes: 9, answers: 4

     Read on SO: [86] http://goo.gl/glKEeK

   * How to avoid default return value when accessing a non-existent

     field with lenses?

     votes: 9, answers: 2

     Read on SO: [87] http://goo.gl/RROrVM

   * How much does Haskell/GHC memoize?

     votes: 9, answers: 1

     Read on SO: [88] http://goo.gl/PuUKt4

Until next time,

[89]+Daniel Santa Cruz

References

   1. http://www.kronosnotebook.com/haskell

   2. http://www.reddit.com/r/haskell/comments/2r43q0/kronos_haskell_notebook_mac_app/

   3. http://two-wrongs.com/the-what-are-monads-fallacy

   4. http://www.reddit.com/r/haskell/comments/2r2cpe/the_what_are_monads_fallacy/

   5. http://www.reddit.com/r/haskell/comments/2qu7w8/learn_you_some_algebras_for_glorious_good_a_fun/

   6. http://www.reddit.com/r/haskell/comments/2qu7w8/learn_you_some_algebras_for_glorious_good_a_fun/

   7. http://takenobu-hs.github.io/downloads/haskell_ghc_illustrated.pdf

   8. http://www.reddit.com/r/haskell/comments/2qxcmz/ghc_illustrated_pdf/

   9. http://www.haskellcast.com/episode/009-conal-elliott-on-frp-and-denotational-design/

  10. http://www.reddit.com/r/haskell/comments/2pdhe9/the_haskell_cast_9_conal_elliott_on_frp_and/

  11. https://phabricator.haskell.org/rGHCfc45f32491313d2a44e72d8d59cdf95b1660189d

  12. http://www.reddit.com/r/haskell/comments/2otl0f/ghc_7101_will_support_static_values_allowing_you/

  13. https://ocharles.org.uk/blog/posts/2014-12-24-conclusion.html

  14. http://www.reddit.com/r/haskell/comments/2qbfpe/24_days_of_ghc_extensions_thanks/

  15. http://stefan.saasen.me/articles/git-clone-in-haskell-from-the-bottom-up/

  16. http://www.reddit.com/r/haskell/comments/2okt2e/git_clone_in_haskell_from_the_bottom_up/

  17. http://augustss.blogspot.com/2014/12/a-commentary-on-24-days-of-ghc.html

  18. http://www.reddit.com/r/haskell/comments/2pdu4a/a_commentary_on_24_days_of_ghc_extensions/

  19. http://www.haskellforall.com/2014/12/a-very-general-api-for-relational-joins.html

  20. http://www.reddit.com/r/haskell/comments/2oji35/haskell_for_all_a_very_general_api_for_relational/

  21. http://elm-lang.org/blog/announce/0.14.elm

  22. http://www.reddit.com/r/haskell/comments/2ovgw4/elm_014_simpler_core_better_tools/

  23. http://alpmestan.com/posts/2014-12-09-rethinking-webservices-apis-haskell.html

  24. http://www.reddit.com/r/haskell/comments/2orb8t/rethinking_webservice_and_apis_in_haskell_servant/

  25. http://permalink.gmane.org/gmane.comp.lang.haskell.ghc.devel/7529

  26. http://www.reddit.com/r/haskell/comments/2q6eei/announce_ghc_7101_release_candidate_1/

  27. https://ocharles.org.uk/blog/guest-posts/2014-12-18-rank-n-types.html

  28. http://www.reddit.com/r/haskell/comments/2pqtxk/24_days_of_ghc_extensions_rank_n_types/

  29. http://www.stephendiehl.com/posts/essential_compilers.html

  30. http://www.reddit.com/r/haskell/comments/2pbt0e/a_haskell_implementation_reading_list/

  31. https://github.com/Dobiasd/articles/blob/master/programming_language_learning_curves.md

  32. http://www.reddit.com/r/haskell/comments/2qjnho/learning_curves_for_different_programming/

  33. http://bitemyapp.com/posts/2014-12-31-functional-education.html

  34. http://www.reddit.com/r/haskell/comments/2r0q9h/functional_education/

  35. https://snowdrift.coop/p/snowdrift/w/en/jobs

  36. http://www.reddit.com/r/haskell/comments/2r6nke/snowdriftcoop_hiring_lead_programmer_haskellyesod/

  37. https://ocharles.org.uk/blog/posts/2014-12-14-functional-dependencies.html

  38. http://www.reddit.com/r/haskell/comments/2pal4v/24_days_of_ghc_extensions_functional_dependencies/

  39. http://purelytheoretical.com/sywtltt.html

  40. http://www.reddit.com/r/haskell/comments/2pzczc/so_you_want_to_learn_type_theory_but_where_to/

  41. https://ocharles.org.uk/blog/guest-posts/2014-12-23-static-pointers.html

  42. http://www.reddit.com/r/haskell/comments/2q85zp/24_days_of_hackage_static_pointers_guest_post_by/

  43. https://ocharles.org.uk/blog/posts/2014-12-12-type-families.html

  44. http://www.reddit.com/r/haskell/comments/2p3mrm/24_days_of_ghc_extensions_type_families/

  45. https://ocharles.org.uk/blog/posts/2014-12-10-nullary-type-classes.html

  46. http://www.reddit.com/r/haskell/comments/2ovvnk/24_days_of_ghc_extensions_nullary_type_classes/

  47. https://ocharles.org.uk/blog/posts/2014-12-16-derive-generic.html

  48. http://www.reddit.com/r/haskell/comments/2pirdg/24_days_of_ghc_extensions_derivegeneric/

  49. https://ocharles.org.uk/blog/guest-posts/2014-12-19-existential-quantification.html

  50. http://www.reddit.com/r/haskell/comments/2pu0e8/24_days_of_ghc_extensions_existential/

  51. https://ocharles.org.uk/blog/posts/2014-12-13-multi-param-type-classes.html

  52. http://www.reddit.com/r/haskell/comments/2p792t/24_days_of_ghc_extensions_multiparameter_type/

  53. https://www.youtube.com/watch?v=-qISxjnikJ4

  54. http://www.reddit.com/r/haskell/comments/2oqo33/a_demo_written_in_haskell_got_3rd_place_in/

  55. https://ocharles.org.uk/blog/posts/2014-12-17-overloaded-strings.html

  56. http://www.reddit.com/r/haskell/comments/2pmon2/24_days_of_ghc_extensions_overloaded_strings/

  57. http://blog.jle.im/entry/intro-to-machines-arrows-part-1-stream-and

  58. http://www.reddit.com/r/haskell/comments/2qirmb/intro_to_machines_arrows_part_1_stream_and_auto/

  59. https://ocharles.org.uk/blog/posts/2014-12-09-recursive-do.html

  60. http://www.reddit.com/r/haskell/comments/2osh3v/24_days_of_ghc_extensions_recursive_do/

  61. https://ocharles.org.uk/blog/guest-posts/2014-12-20-scoped-type-variables.html

  62. http://www.reddit.com/r/haskell/comments/2pwecw/24_days_of_ghc_extensions_scoped_type_variables/

  63. http://permalink.gmane.org/gmane.comp.lang.haskell.ghc.devel/7526

  64. http://www.reddit.com/r/haskell/comments/2q6oln/announce_ghc_version_784/

  65. http://bartoszmilewski.com/2014/12/05/categories-great-and-small/

  66. http://www.reddit.com/r/haskell/comments/2phex1/categories_great_and_small_from_bartosz_milewskis/

  67. http://ro-che.info/articles/2014-12-31-denotational-design-does-not-work

  68. http://www.reddit.com/r/haskell/comments/2qvbhp/denotational_design_does_not_work/

  69. http://stackoverflow.com/questions/27664213/what-is-happening-when-i-compose-with-in-haskell

  70. http://stackoverflow.com/questions/27541609/difference-in-performance-of-compiled-accelerate-code-ran-from-ghci-and-shell

  71. http://stackoverflow.com/questions/27421598/why-does-this-haskell-program-diverge

  72. http://stackoverflow.com/questions/27630833/is-it-possible-to-skip-the-nursery

  73. http://stackoverflow.com/questions/27463669/haskell-performance-implementing-unixs-cat-program-with-data-bytestring

  74. http://stackoverflow.com/questions/27471937/showsprec-and-operator-precedences

  75. http://stackoverflow.com/questions/27557380/why-does-let-y-1-y-compile-and-what-does-it-mean

  76. http://stackoverflow.com/questions/27490352/type-family-shenanigans-in-ghci

  77. http://stackoverflow.com/questions/27663435/quirkiness-in-haskell-7-8-3

  78. http://stackoverflow.com/questions/27476446/what-is-the-difference-between-value-constructors-and-tuples

  79. http://stackoverflow.com/questions/27672585/efficient-version-of-inits

  80. http://stackoverflow.com/questions/27676294/working-out-the-details-of-a-type-indexed-free-monad

  81. http://stackoverflow.com/questions/27408873/how-to-model-a-currencies-money-and-banks-that-exchange-money-between-currenci

  82. http://stackoverflow.com/questions/27568791/why-are-these-functions-differently-evaluated

  83. http://stackoverflow.com/questions/27683108/why-does-a-more-general-type-affect-runtime-in-haskell

  84. http://stackoverflow.com/questions/27381133/list-based-on-right-kan-extension

  85. http://stackoverflow.com/questions/27391293/how-to-inject-the-result-of-an-io-action-into-a-non-io-monadic-computation

  86. http://stackoverflow.com/questions/27561604/why-i-get-the-class-num-a-where-instead-of-the-class-eq-a-show-a-num-a

  87. http://stackoverflow.com/questions/27567664/how-to-avoid-default-return-value-when-accessing-a-non-existent-field-with-lense

  88. http://stackoverflow.com/questions/27570371/how-much-does-haskell-ghc-memoize

  89. https://plus.google.com/105107667630152149014/about