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Bryan O'Sullivan's blog
Blog Archives
A Haskell regular expression tutorial
Someone showed up on #haskell yesterday, asking how to use regular expressions. This isn’t a completely straightforward question to answer. While Haskell’s regexp libraries provide the same functionality you’ll find in Perl, Python, and Java, they provide a rich and…
Posted in haskell
A quick programmer’s look at NVIDIA’s CUDA
I spent a while this evening reading through the documentation for the beta release of NVIDIA’s CUDA GPGPU system. My motivation for this was that nvcc, the CUDA compiler, is based on a code drop of the EkoPath compiler, which…
Haskell Cabal, now with extra crunchy RPM goodness
The Haskell community has a very nice implementation-independent mechanism for building libraries and applications, called Cabal. I spent a few hours over the past couple of days hacking on Cabal to add the ability to build RPM packages. You can…
Posted in haskell
Esh, the fabulous, forgotten Scheme implementation
In 1995, I moved from Ireland to the San Francisco Bay Area, because I’d been offered a job that promised to combine Unix and Scheme hacking. The prospect tickled me pink. At Sun Microsystems, the SPARC design team used a…
Posted in software
Parsing a simple config file in Haskell
Even though I wrote my Haskell blog helper tool purely for my own use, I don’t want to store hard-coded strings in it, lest my username and password escape into the wild. This suggests that I need a small config…
Blogging with Emacs and Haskell, part Zero
Since I started using WordPress to host my blog, I’ve generally been fairly pleased with it. Its killer feature has to be Akismet, the built-in spam filter. Akismet has so far killed over 18,000 spam comments for me, or roughly…
Beautiful graphics manipulation (in Haskell, artistic flair required)
During my evening’s Haskell-related Googling, I came across a piece of software called Pancito, written by Andrew Cooke. Pancito is a Haskell package for manipulating images, and Andrew has a beautiful gallery of some of the work he’s done with…
Posted in haskell, open source
Playing fast and loose with Parsec for parsing in Haskell
For the past number of years, whenever I’ve needed to write a parser for a language, I’ve turned to Terence Parr’s ANTLR. It’s a wonderful piece of software, far more capable than the old standbys lex and yacc. Just as…
Posted in haskell
New Haskell packages for Fedora Extras
Rather than bemoan the state of prepackaged Haskell goodness for Fedora, I’ve started down the path of doing something about it. This morning, I put together new packages for Alex, a Haskell lexer, and Happy, a parser generator, and submitted…
Posted in haskell
First impressions of darcs: not so hot
I’ve been using darcs recently for some Haskell-related revision control tasks, as it’s the revision control tool of choice for the Haskell community (no surprise; it’s the most widely used Haskell program in existence). However, I can’t say I’ve been…
Posted in scm
