Welcome to issue 250 of the HWN, an issue covering crowd-sourced bits
of information about Haskell from around the web. This issue covers the
week of October 28 to November 3, 2012.
Quotes of the Week
* Cale: A list is a bit like a loop which hasn't happened yet. This
operation is similar to "how do I make the 5th iteration of my loop
do something different from the others?"
* broombs: Why are there multiple packages for EitherT?
broombs: edwardk: which is the better one?
edwardk: broombs: either
And today, we have our first quote submited via twitter! Thank you
@gersei for sending this one in. If you'd like to submit quotes via
twitter, add @HWNQuotes to your tweet.
* @kmett:We now generate pretty core but have ugly code.
Top Reddit Stories
* Cartesian Closed Comic #15: Iteratees
Domain: ro-che.info, Score: 75, Comments: 2
On Reddit: [1] http://goo.gl/9NpD2
Original: [2] http://goo.gl/SB7HZ
* Are there any, or is there interest in starting, an online Haskell
course like the Scala course on Coursera?
Domain: class.coursera.org, Score: 69, Comments: 16
On Reddit: [3] http://goo.gl/UzBdF
Original: [4] http://goo.gl/1Zzct
* Why is this simple text processing program so much slower than in
dynamic languages?
Domain: honza.ca, Score: 65, Comments: 189
On Reddit: [5] http://goo.gl/jW5ow
Original: [6] http://goo.gl/pPzIb
* Fast Code Nation: The Bright Side of High-Level Languages
Domain: bos.github.com, Score: 59, Comments: 11
On Reddit: [7] http://goo.gl/KmBRt
Original: [8] http://goo.gl/jm9s7
* Fay slides
Domain: fay-lang.org, Score: 56, Comments: 42
On Reddit: [9] http://goo.gl/0UM4T
Original: [10] http://goo.gl/h8iZE
* Data.Records: extensible records using the latest GHC features
Domain: github.com, Score: 55, Comments: 44
On Reddit: [11] http://goo.gl/64wUj
Original: [12] http://goo.gl/XVdB2
* Why Cabal Has Problems
Domain: softwaresimply.blogspot.com, Score: 50, Comments: 41
On Reddit: [13] http://goo.gl/ZX1Ia
Original: [14] http://goo.gl/TgnOG
* The cabal/hackage situation, and what you can do about it
Domain: alpmestan.com, Score: 49, Comments: 14
On Reddit: [15] http://goo.gl/jEGIj
Original: [16] http://goo.gl/EK2DB
* Brian O'Sullivan's favorite bug in GHC
Domain: twitter.com, Score: 48, Comments: 12
On Reddit: [17] http://goo.gl/nMjeK
Original: [18] http://goo.gl/odPH4
* Haskell for all: "Hello, core!"
Domain: haskellforall.com, Score: 45, Comments: 6
On Reddit: [19] http://goo.gl/qXRd2
Original: [20] http://goo.gl/9cBeo
* Michael Snoyman: Yesod, AngularJS and Fay
Domain: yesodweb.com, Score: 43, Comments: 26
On Reddit: [21] http://goo.gl/8yfVd
Original: [22] http://goo.gl/0xtPP
* Cellular automata as comonads
Domain: blog.sigfpe.com, Score: 41, Comments: 10
On Reddit: [23] http://goo.gl/73nr2
Original: [24] http://goo.gl/vH4TK
* pipes-2.5: Faster and slimmer
Domain: haskellforall.com, Score: 41, Comments: 56
On Reddit: [25] http://goo.gl/wtUZg
Original: [26] http://goo.gl/rKR2D
Top StackOverflow Questions
* Writing cojoin or cobind for n-dimensional grid type
votes: 41, answers: 3
Read on SO: [27] http://goo.gl/qbz7z
* Why not be dependently typed?
votes: 39, answers: 3
Read on SO: [28] http://goo.gl/1TSVh
* Concrete example showing that monads are not closed under composition
(with proof)?
votes: 32, answers: 4
Read on SO: [29] http://goo.gl/sys7F
* Monad Transformers vs Passing parameters to functions
votes: 24, answers: 1
Read on SO: [30] http://goo.gl/UpU57
* Why is there no IO transformer in Haskell?
votes: 16, answers: 2
Read on SO: [31] http://goo.gl/04Xc7
* Is it possible to make GHC optimize (deforest) generic functions such
as catamorphisms?
votes: 16, answers: 1
Read on SO: [32] http://goo.gl/f4ZlU
* Is it possible to use irrefutable tilde (`~`) patterns in lambda
expressions?
votes: 14, answers: 1
Read on SO: [33] http://goo.gl/BmGY0
* Can Scala's Cake Pattern be implemented in Haskell?
votes: 13, answers: 2
Read on SO: [34] http://goo.gl/QiMfg
* Confused by the meaning of the 'Alternative' type class and its
relationship to other type classes
votes: 13, answers: 5
Read on SO: [35] http://goo.gl/RXNuV
* How to add fields that only cache something to ADT?
votes: 13, answers: 0
Read on SO: [36] http://goo.gl/FjLlX
* Type algebra and Knuth's up arrow notation
votes: 13, answers: 1
Read on SO: [37] http://goo.gl/kyYIn
Until next time,
Daniel Santa Cruz
References
1. http://ro-che.info/ccc/15.html
2.
http://www.reddit.com/r/haskell/comments/11t7ru/cartesian_closed_comic_15_iteratees/
3. https://class.coursera.org/course/progfun
4.
http://www.reddit.com/r/haskell/comments/12865b/are_there_any_or_is_there_interest_in_starting_an/
5. http://honza.ca/2012/10/haskell-strings
6.
http://www.reddit.com/r/haskell/comments/120h6i/why_is_this_simple_text_processing_program_so/
7. http://bos.github.com/reaktor-dev-day-2012/reaktor-talk-slides.html
8.
http://www.reddit.com/r/haskell/comments/11sl47/fast_code_nation_the_bright_side_of_highlevel/
9. http://fay-lang.org/fay-talk/
10. http://www.reddit.com/r/haskell/comments/11yrpi/fay_slides/
11. https://github.com/jonsterling/Data.Records
12.
http://www.reddit.com/r/haskell/comments/12835b/datarecords_extensible_records_using_the_latest/
13. http://softwaresimply.blogspot.com/2012/11/why-cabal-has-problems.html
14.
http://www.reddit.com/r/haskell/comments/12hbzb/why_cabal_has_problems/
15.
http://alpmestan.com/posts/2012-11-02-cabal-hackage-what-you-can-do-about-it.html
16.
http://www.reddit.com/r/haskell/comments/12ijs7/the_cabalhackage_situation_and_what_you_can_do/
17. https://twitter.com/bos31337/status/116372971509121025
18.
http://www.reddit.com/r/haskell/comments/127emo/brian_osullivans_favorite_bug_in_ghc/
19. http://www.haskellforall.com/2012/10/hello-core.html
20.
http://www.reddit.com/r/haskell/comments/11vuzz/haskell_for_all_hello_core/
21. http://www.yesodweb.com/blog/2012/10/yesod-fay-js
22.
http://www.reddit.com/r/haskell/comments/12ct6p/michael_snoyman_yesod_angularjs_and_fay/
23. http://blog.sigfpe.com/2006/12/evaluating-cellular-automata-is.html
24.
http://www.reddit.com/r/haskell/comments/11o6nu/cellular_automata_as_comonads/
25. http://www.haskellforall.com/2012/10/pipes-25-faster-and-slimmer.html
26.
http://www.reddit.com/r/haskell/comments/12gikh/pipes25_faster_and_slimmer/
27.
http://stackoverflow.com/questions/12963733/writing-cojoin-or-cobind-for-n-dimensional-grid-type
28.
http://stackoverflow.com/questions/12961651/why-not-be-dependently-typed
29.
http://stackoverflow.com/questions/13034229/concrete-example-showing-that-monads-are-not-closed-under-composition-with-proo
30.
http://stackoverflow.com/questions/12968351/monad-transformers-vs-passing-parameters-to-functions
31.
http://stackoverflow.com/questions/13056663/why-is-there-no-io-transformer-in-haskell
32.
http://stackoverflow.com/questions/13099203/is-it-possible-to-make-ghc-optimize-deforest-generic-functions-such-as-catamor
33.
http://stackoverflow.com/questions/13185632/is-it-possible-to-use-irrefutable-tilde-patterns-in-lambda-expressions
34.
http://stackoverflow.com/questions/12947176/can-scalas-cake-pattern-be-implemented-in-haskell
35.
http://stackoverflow.com/questions/13080606/confused-by-the-meaning-of-the-alternative-type-class-and-its-relationship-to
36.
http://stackoverflow.com/questions/13098448/how-to-add-fields-that-only-cache-something-to-adt
37.
http://stackoverflow.com/questions/13170803/type-algebra-and-knuths-up-arrow-notation
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