By default, non-admins cannot SSH from remote systems into Mac OS X even if "Remote Login" is enabled in System Preferences / Sharing. Here's how to fix that.

How to view the contents of your Rails session cookie, the Rails 4.2 version.

Elasticsearch will create indices for you on-the-fly. This can be a problem when you want your index to have additional analyzers.

A look at what happens when you run a command on a *nix system, focussing on virtual memory, memory addressing, files and inodes.

This is a document I wrote in 2002 while leading a RAID array development team. The ideas captured here are as relevant today as they were then. In the Ruby community today, there is a very strong focus on maintainability.

Simple Form still doesn't support Bootstrap 3, seven months after they started discussing it.

Saw a very interesting presentation by Sandi Metz last night. The essence of it is captured in the 5 rules below:

On some Rails projects that use PostgreSQL as their database, you may find running Zeus will stop you doing rake db:test:prepare. Here's now to make them play nice together.

In development mode, Rails will reload all classes you use for each request, allowing you to rapidly modify and test code without restarting the server. Recently, while debugging a gem I was developing, I had cause to figure out how this all works.

A picture is worth a thousand words. Check out the graph in Martin Fowler's Design Stamina Hypothesis article explaining the impact of poor design. This hypothesis applies to "code without tests" too.