Thoughts about the differences between CLIs and GUIs in relation to materiality of user interaction and it's consequences.
Nice quick overview of bitwise operation and how to use them in ruby to do some basic "tricks".
Use Postgres' DISTINCT ON clause to get rid of N+1 in Rails.
Quick list of cool ways to use the *splat operator.
Simple exlanation and an example of linear regression in ruby.
How to use ruby's built-in file based key-value store as a cache for your HTTP requests.
How to pretty print CSV files on the commandline using only the basic unix tools?