Namespacing controllers in a Ruby on Rails application is a great way to isolate different features: invoicing, authentication, etc. It's also pretty simple to implement, so there are no reasons not to do it if you need it.

After digging into REST and various RFCs, I'm really wondering why developers still call their APIs "RESTful". Who was the first guy who decided to pin "RESTful" on his API? Did he actually read Fielding's dissertations? I have my doubts...

We are getting to my favorite part: automated testing! I used to hate it before and then I had to work on a big legacy application, which luckily had tests. I was so happy to be able to refactor it without breaking anything that now, I simply love writing tests for my applications.