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I've released version 0.4.0.0 of the text-icu library, my Haskell bindings for the International Components for Unicode (ICU) library. The text-icu library is the practical cousin to the text library: it implements a myriad of Unicode-related functionality that is not yet otherwise available in Haskell. Features: Locale sensitive case mapping Text normalization [NEW] Locale sensitive [...]

I spent some time today trying to talk to a MySQL database server from a piece of middleware I'm writing in Haskell. You might think that talking to a database server would be easy, but it turned out to be quite a bother.Both of the major MySQL bindings, HDBC-mysql and HDBC-odbc, use the libmysqlclient C [...]

I just published the base64-bytestring library, which fills a surprising gap in Haskell's library coverage by adding support for base64 encoding and decoding of the ByteString type. The library is written in pure Haskell, and it's fast: 250 MB/sec encoding 200 MB/sec strict decoding (per RFC 4648) 100 MB/sec lenient decoding The above numbers compares [...]

After several months of work, I'm pleased to announce the release of version 0.8.0.0 of the Haskell text library, which provides fast Unicode support with a pleasing API. Compared to previous versions, this has the following major changes: Improved performance. Some common functions, including support for Unicode I/O, are up to 3x faster than before. [...]

Here's a useful little tip if you need to use hg convert to generate a stripped-down copy of a Mercurial repository. For instance, maybe we have a tree that someone committed a large file to by accident, or perhaps someone accidentally checked some closed source code into an open source tree. If such a commit [...]

I'm on the program committee for the 2011 Practical Aspects of Declarative Languages (PADL) conference, so I heartily encourage you to submit a paper on that exciting functional programming project you've been working on. Topics of interest include: Innovative applications of declarative languages. Declarative domain-specific languages and applications. Practical applications of theoretical results. New language [...]

Thanks to diligent work by Johan, our new I/O manager is ready to merge into the main GHC tree. All the tests pass, and it’s performing well. I’ll post an update when it gets merged into HEAD. We also heard back from the peer reviewers for this year’s Haskell Symposium that our paper describing the [...]

On the Haskell libraries mailing list, Cale Gibbard made an interesting suggestion for a couple of useful list-related functions that could be added to the standard list library. The particular one I'm interested in is his separate function: separate :: [a] -> [([a],a,[a])] The idea is that this function should produce a list of all [...]

After a few months of blissfully doing precious little hacking in our spare time, Johan and I have returned to work on the new event manager for GHC. I spent the past few days writing a paper about the motivation, design, and internals of the new event manager, which I submitted to this year’s Haskell [...]

My goal in working on the new GHC I/O manager has been to get the Haskell network stack into a state where it could be used to attack high-performance and scalable networking problems, domains in which it has historically been weak.While it's encouraging to have an excellent networking stack (Johan and I now have this [...]