Welcome to issue 180 of the HWN, a newsletter covering developments in the Haskell community. This release covers the week of May 15 to 21, 2011. Announcements Janis Veigtlander announced that the 20th edition of the Haskell Communities and Activities reports is hot off the press! http://goo.gl/GRi7V Simon Marlow announced that he has put together a tutorial on Parallel and Concurrent programming in Haskell. http://goo.gl/LPst8 Quotes of the Week * Sergey Mironov:I looked further and found that 'Oleg already did it'. * monochrom: just say "yes" Top Reddit Stories * Wolfgang - A Wolfram Alpha clone in Haskell (under heavy load?) Domain: jabberwock.xs4all.nl, Score: 75, Comments: 10 On Reddit: http://goo.gl/okNC7 Original: http://goo.gl/7pSXA * Numeric Haskell: a tutorial about the multi-dimensional, parallel arrays package, Repa Domain: haskell.org, Score: 54, Comments: 7 On Reddit: http://goo.gl/ZRSn3 Original: http://goo.gl/InWB9 * Space leak zoo: a catalog of common space leaks in Haskell programs Domain: blog.ezyang.com, Score: 41, Comments: 7 On Reddit: http://goo.gl/npVLv Original: http://goo.gl/aMbo5 * Exercises in Optimization: A (soon to be) three-part series detailing an adventure in optimizing Haskell code. Domain: csks.wordpress.com, Score: 34, Comments: 0 On Reddit: http://goo.gl/cjWBX Original: http://goo.gl/wPqbl * Tutorial: Parallel and Concurrent Programming in Haskell :: PDF Domain: community.haskell.org, Score: 33, Comments: 7 On Reddit: http://goo.gl/CB1wt Original: http://goo.gl/yzTOU * Anatomy of a thunk leak: How to debug Haskell’s most famous space leak Domain: blog.ezyang.com, Score: 32, Comments: 3 On Reddit: http://goo.gl/f18jX Original: http://goo.gl/PiQ98 * Preview release of diagrams EDSL for declarative drawing Domain: haskell.org, Score: 31, Comments: 9 On Reddit: http://goo.gl/6sykO Original: http://goo.gl/uhbV1 * I/O is not a monad Domain: r6.ca, Score: 31, Comments: 23 On Reddit: http://goo.gl/zAra5 Original: http://goo.gl/mn49r * Eliza in 70 lines of Haskell Domain: github.com, Score: 28, Comments: 7 On Reddit: http://goo.gl/hjgNf Original: http://goo.gl/S7t9m * The "Whole Program" Fallacy Domain: lukepalmer.wordpress.com, Score: 26, Comments: 10 On Reddit: http://goo.gl/Efja3 Original: http://goo.gl/vzXVK Top StackOverflow Questions * What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels? votes: 48, answers: 3 Read on SO: http://goo.gl/gVpwB * Good introductory text about GHC implementation? votes: 24, answers: 2 Read on SO: http://goo.gl/6MZoh * Questions on a Haskell -> C# conversion votes: 13, answers: 3 Read on SO: http://goo.gl/0t3Gu * Can't perform I/O in foldr? votes: 12, answers: 4 Read on SO: http://goo.gl/d9Jg0 * What does "this function will fuse" mean? votes: 11, answers: 3 Read on SO: http://goo.gl/tMdlR * Haskell function type question votes: 10, answers: 3 Read on SO: http://goo.gl/gyTns * Is this always true: fmap (foldr f z) . sequenceA = foldr (liftA2 f) (pure z) votes: 10, answers: 1 Read on SO: http://goo.gl/emKmg * Difference between hsc2hs and c2hs? votes: 8, answers: 2 Read on SO: http://goo.gl/1wnhC * Is it possible to create PHP extensions in Haskell? votes: 8, answers: 2 Read on SO: http://goo.gl/QwkpK * How can configuration tools like sdl-config be used with a cabalized project? votes: 8, answers: 2 Read on SO: http://goo.gl/vHCOu About the Haskell Weekly News To help create new editions of this newsletter, please send stories to dstcruz@gmail.com. Until next time, Daniel Santa Cruz