Haskell Weekly News: July 03, 2006
A week of busy activity in the community. Thanks to Simon Marlow and Josef Svenningsson for contributions to this issue.
HDBC 1.0 . John Goerzen released the latest HDBC. HDBC is a database tool, modeled loosely on Perl's DBI interface, though it has also been influenced by Python's DB-API v2, JDBC in Java, and HSQL in Haskell. You can find the code here.
hpodder . John Goerzen announced the first release of hpodder. hpodder is a podcast downloader (podcatcher) written in pure Haskell. It exists because John was unsatisfied with the other podcatchers for Linux. Full details here.
hmp3 1.1 . Don Stewart announced a new release of hmp3, the curses-based mp3 player written in Haskell. Release 1.1 is a maintenance release, fixing support for GHC 6.4.2
QDBM and Hyper Estraier bindings . Jun Mukai released a library of bindings to Quick DBM, a database module similar to GDBM, Berkeley-DB, optimized for performance and a simple API. Additionally, Jun's code includes support for Hyper Estraier, a full-text search system using QDBM, with the ability to search documents according to keywords.
Streams 0.2 . Bulat Ziganshin announced the beta release of his Streams 0.2 library, providing fast string and binary IO, now with Data.ByteString support.
HNOP 0.1 . Ashley Yakeley released the first version of HNOP 0.1. HNOP does nothing. This version should be considered "beta" quality.
HList updates . Oleg Kiselyov announced that HList, the library for strongly typed heterogeneous lists, records, type-indexed products (TIP) and co-products is now accessible via darcs, here. Additionally, Oleg pointed to some new features for HList, including a new representation for open records. Finally, he published a note on how HList supports, natively, polymorphic variants: extensible recursive open sum datatypes, quite similar to Polymorphic variants of OCaml. HList thus solves the `expression problem' -- the ability to add new variants to a datatype without changing the existing code.
Translating Haskell into English . Shannon Behrens published a new Haskell tutorial, hoping to give readers a glimpse of the Zen of Haskell, without requiring that they already be Haskell converts.
Haskell'This section covers the Haskell' standardisation process.
Haskell and the Great Language Shootout, reloaded . Simon Marlow highlighted some remarks and discussion from Brent Fulgham, the driving force behind the Great Language Shootout on the impact recent advances in the performance of GHC have had. In particular, many benchmarks had to be rewritten due to the performance advantage lazy Haskell programs had over strict (and wasteful) entries in other languages. Brent noted that "applications written in Haskell can be reasonably expected to yield good performance on all of the common x86 platforms without customizations". This in turn led to a discussion about further improvements we can expect to see in GHC Haskell over the next few months.
HNOP, doing nothing, and really complex ways of doing nothing . Ashley Yakeley forked a somewhat surreal thread regarding Haskell programs that do nothing.
Quotes of the Week
- Brian Hulley : "It is definitely *a* haskell. There is actually no word in English with a silent 'h', though this statement is unfortunately controversial and news to whoever wrote the spell checker used in many printed publications. Of course some particular dialects use different pronunciation like 'me 'otel room 'ad an 'askell 'mpiler in t' closet as well as tub 'n sink tha knows'"
Thu Jun 29 06:58:36 PDT 2006 Simon Marlow * No longer force -fvia-C for the RTS, it can now be compiled with the NCG
Sat Jul 1 01:43:45 PDT 2006 Don Stewart * Import Data.ByteString.Lazy, improve ByteString Fusion, and resync with FPS head This patch imports the Data.ByteString.Lazy module, and its helpers, providing a ByteString implemented as a lazy list of strict cache-sized chunks. This type allows the usual lazy operations to be written on bytestrings, including lazy IO, with much improved space and time over the [Char] equivalents.
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