In my last post, I described IO (IO ()) as being a sign you might've made a mistake unless you knew it was what you wanted. There are patterns which involve using a closed-over mutable reference for things like counters. This naturally leads to nested IO actions.

While playing around with querying ElasticSearch I bumped into something that I hadn't really understood explicitly before about monads, nesting, and IO. Rather than blather on, I'm going to share a "literate" ghci session that demonstrates the point. Main editing change I made was to remove duplication in the output from querying the type :t in ghci.

A brief demonstration of how to run Clojure programs like scripts with leiningen.

Using drip to run Clojure code like a script.

It's Valentine's Day 2013 and since January 2013 I've read the following books.

Getting the following error on Mac OS X? Read on.

I am a user of irssi over GNU Screen + ssh as well as locally, and I tend to use Emacs style text movements in bash, so need my ctrl and alt/option keys to work more or less as they do in Linux.

You close connections, you end requests.

When I was getting the Jekyll version of my site rolling, I ran into some problems with how RedCloth, liquid, and pygments were interacting. What follows is the error that was caused.

You need to install xmonad-extras from Hackage as the volume control functions are not included by default in any standard XMonad install. Below is the script for getting it installed.