Welcome to issue 293 of the HWN, an issue covering crowd-sourced bits

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

from April 20 to 26, 2014

Quotes of the Week

* monochrom: linux's ulimit for main memory will not help because

linux kernel's allocator is a lazy yes-man (think irrefutable

pattern)

* edwardk: lens is the only library I've ever written that generates

hate mail and invites to give talks in almost equal measure

* shachaf: You don't need lens to produce or consume lenses. You just

need it to complain about them.

* glguy_: Reddit has shown you don't need to have used the lens

package to complain about it, either

Top StackOverflow Questions

* How do experienced Haskell developers approach laziness at *design* time?

votes: 26, answers: 1

Read on SO: [25] http://goo.gl/obf2MG

* Lax monoidal functors with a different monoidal structure

votes: 14, answers: 3

Read on SO: [26] http://goo.gl/gR954y

* Maximizing Haskell loop performance with GHC

votes: 13, answers: 2

Read on SO: [27] http://goo.gl/TNaeB7

* What does it mean that the semantics (of Haskell) are affected by the

inferred types (of return type polymorphism)?

votes: 12, answers: 2

Read on SO: [28] http://goo.gl/e702Su

* Write a parallel array Haskell expression once, run on

CPUs & GPUs with repa and accelerate

votes: 10, answers: 2

Read on SO: [29] http://goo.gl/gvSnV8

* Best way to save 10 GB vector to disk in Haskell

votes: 9, answers: 3

Read on SO: [30] http://goo.gl/6SjJeG

* What is the purpose of the `Typeable (* -> Constraint) Monoid` instance?

votes: 9, answers: 1

Read on SO: [31] http://goo.gl/QeLSHm

Until next time,

[32]+Daniel Santa Cruz

References

1. http://dev.stephendiehl.com/hask

2. http://www.reddit.com/r/haskell/comments/23srcm/what_i_wish_i_knew_when_learning_haskell_20/

3. http://blog.johantibell.com/2014/04/announcing-cabal-120.html

4. http://www.reddit.com/r/haskell/comments/23i6ih/announcing_cabal_120/

5. http://ro-che.info/articles/2014-04-24-lens-unidiomatic.html

6. http://www.reddit.com/r/haskell/comments/23uzpg/lens_is_unidiomatic_haskell/

7. http://www.serpentine.com/wreq/

8. http://www.reddit.com/r/haskell/comments/23q8kc/wreq_a_capable_new_http_client_library/

9. https://ghc.haskell.org/trac/ghc/browser/ghc/libraries/base/GHC/Base.lhs?rev=88c9403264950326e39a05f262bbbb069cf12977#L382

10. http://www.reddit.com/r/haskell/comments/23ob5a/applicative_became_a_superclass_of_monad/

11. http://cryptol.net/index.html

12. http://www.reddit.com/r/haskell/comments/23w3su/open_sourced_cryptol_a_domain_specific_language/

13. http://www.haskellforall.com/2014/04/model-view-controller-haskell-style.html

14. http://www.reddit.com/r/haskell/comments/2407hs/modelviewcontroller_haskellstyle/

15. http://www.reddit.com/r/haskell/comments/23x3f3/lenses_dont_compose_backwards/

16. http://www.reddit.com/r/haskell/comments/23x3f3/lenses_dont_compose_backwards/

17. http://www.google-melange.com/gsoc/projects/list/google/gsoc2014

18. http://www.reddit.com/r/haskell/comments/23mfwj/14_haskell_projects_accepted_for_google_summer_of/

19. http://themonadreader.wordpress.com/2014/04/23/issue-23/

20. http://www.reddit.com/r/haskell/comments/23u25r/new_issue_of_the_monad_reader_23/

21. http://mth.io/talks/lens-from-the-ground-up/

22. http://www.reddit.com/r/haskell/comments/23z5xb/lens_from_the_ground_up/

23. http://duplode.github.io/posts/lenses-you-can-make-at-home.html

24. http://www.reddit.com/r/haskell/comments/241aec/lenses_you_can_make_at_home/

25. http://stackoverflow.com/questions/23280936/how-do-experienced-haskell-developers-approach-laziness-at-design-time

26. http://stackoverflow.com/questions/23316255/lax-monoidal-functors-with-a-different-monoidal-structure

27. http://stackoverflow.com/questions/23315001/maximizing-haskell-loop-performance-with-ghc

28. http://stackoverflow.com/questions/23282921/what-does-it-mean-that-the-semantics-of-haskell-are-affected-by-the-inferred-t

29. http://stackoverflow.com/questions/23202145/write-a-parallel-array-haskell-expression-once-run-on-cpus-gpus-with-repa-and

30. http://stackoverflow.com/questions/23247289/best-way-to-save-10-gb-vector-to-disk-in-haskell

31. http://stackoverflow.com/questions/23277838/what-is-the-purpose-of-the-typeable-constraint-monoid-instance

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