Haskell Weekly News: Issue 151 - February 28, 2010

Welcome to issue 151 of HWN, a newsletter covering developments in the Haskell community.

A light HWN this week, some interesting discussion about view patterns and free monads. Also announced this week was TryHaskell a work-in-progress online interactive haskell interpreter and tutorial. The author (based on his reddit post) has asked us not to post this to proggit yet, but I don't think he'll mind a plug here. So after you're done reading, give it a try! Until next week, haskellers, your Haskell Weekly News.

Announcements

wxHaskell for ghc-6.12.1. Daniel Fischer announced a new release of wxHaskell.

concurrent-extra-0.2. Roel van Dijk announced a new release of concurrent-extra

jhc-0.7.3. John Meacham announced a new version of jhc, including many bug fixes.

Try Haskell! An interactive tutorial in your browser. Benjamin L. Russell told us about the TryHaskell Project, available at TryHaskell.org. TryHaskell is an interactive, online Haskell interpreter and tutorial.

MSFP: Call for Papers. Venanzio Capretta announced a call for papers for the Third Workshop on Mathematically Structured Functional Programming.

HLedger 0.8. Simon Michael announced a new version of hledger last week, but it slipped through my radar. This release includes bug fixes, some refactoring, and High-Res Graphical Chart generation capability.

Discussion

View patterns. Andrew Coppin asked about making view patterns polymorphic.

What are 'free' Monads? Guenther Schmidt asked what exactly it meant to be a 'free monad'

Multiple Interpretations for a monad? Guenther Schmidt asked about monads which can have multiple levels of meaning and interpretation.

Blog noise

• Joachim Breitner: Exploiting sharing in arbtt.

• Martijn van Steenbergen: Colors in GHCi.

• Don Stewart (dons): Evaluation strategies and synchronization: things to watch for.

• Don Stewart (dons): Fusion makes functional programming fun!.

• Michael Snoyman: Simpler is Better.

• Kevin Reid (kpreid): Hvm.hs: an exercise in Haskell golf.

• Bryn Keller: Why Isn't Cabal Installed with GHC?.

• Don Stewart (dons): Modern Benchmarking in Haskell.

Quotes of the Week

• roconnor: sounds like you need a zygohistomorphic prepromorphism
• copumpkin: These are not the monads you are looking for.
• noggle: this language is like having programming super powers

About the Haskell Weekly News

New editions are posted to the Haskell mailing list as well as to the Haskell Sequence and Planet Haskell. RSS is also available, and headlines appear on haskell.org.

To help create new editions of this newsletter, please see the information on how to contribute. Send stories to jfredett . at . gmail . dot . com. The darcs repository is available at darcs get http://patch-tag.com/r/jfredett/HWN2/pullrepo HWN2 .