Author Archives: Brent

Monads: Easy or Hard?

Executive summary: they are actually both (or neither). It is easy to learn their definition but hard to grasp the consequences. Or we might say they are easy to know and hard to understand (grok). It is vitally important for … Continue reading

Posted in haskell, learning, teaching | Tagged , , , | 4 Comments

Diagrams mentoring at Hac Phi

Hac Phi is coming up in less than a month, August 3-5 here in Philadelphia: three days of hanging out with awesome people, eating good food, and hacking on Haskell projects. Judging by past instances, I promise you it will … Continue reading

Posted in diagrams, haskell, projects | Tagged , , | 3 Comments

BlogLiterately 0.5 release

I have now released version 0.5 of BlogLiterately. (You can read about the 0.4 release here.) This version does uploading of images! Here is proof: d’awww. (My previous post explains the problem and solution with image uploads.) It also allows … Continue reading

Posted in haskell, writing | Tagged , , , , , | 3 Comments

New haxr release

I have just uploaded a new version of the haxr package (for writing XML-RPC clients and servers), having become the new maintainer. Here is how it happened. In a previous post I announced the release of BlogLiterately 0.4, a tool … Continue reading

Posted in haskell | Tagged , , , , | 2 Comments

BlogLiterately 0.4 release

I have just released version 0.4 of BlogLiterately, a tool for authoring and uploading blog posts (especially Haskelly ones). Rob Greayer authored the first few versions of this useful tool, for which I’m very thankful. However, he doesn’t have the … Continue reading

Posted in haskell, writing | Tagged , , , | 9 Comments

Unsubscribing from Wolfram emails (rant)

I have been getting a bunch of emails from Wolfram and decided I wanted to unsubscribe.  No problem, right?  I’ll just scroll to the bottom of the email and click the… To view our privacy policy, click here: http://www.wolfram.com/legal/privacy/wolfram-research.html To … Continue reading

Posted in humor | Tagged , , , | 3 Comments

Announcing diagrams 0.5

I am pleased to announce the release of version 0.5 of diagrams, a full-featured framework and embedded domain-specific language for declarative drawing. Check out the gallery for examples of what it can do! Highlights of this release include: A new … Continue reading

Posted in diagrams, haskell, projects | Tagged , , , , | Leave a comment

Parsing context-sensitive languages with Applicative

Many parser combinator libraries in Haskell (such as parsec) have both a Monad interface as well as an Applicative interface. (Actually, to be really useful, you also need MonadPlus along with Monad, or Alternative along with Applicative, in order to … Continue reading

Posted in haskell | Tagged , , , , , , | 11 Comments

Typeclassopedia v2: moving my efforts to the Haskell wiki

I said back in April that I was going to be working on a second edition of the Typeclassopedia. Since then I have worked on it some, but mostly I’ve dithered trying to work out a toolchain for publishing it … Continue reading

Posted in haskell, projects, writing | 5 Comments

Modern art with diagrams: the face of progress

As an addendum to my previous post, here are a few outputs generated while I was debugging: For extra credit, deduce what the bugs were. ;)

Posted in diagrams | Tagged , , , , | 5 Comments