Hi, I choose from ruby weekly news these two articles that can be interesting for yast development.
The first one is about iterative building of collection like create array from another array. I still see it often in code, so it is nice introduction how you can do it. http://robots.thoughtbot.com/iteration-as-an-anti-pattern/ Ideally you should stop yourself before each `each` statement you write what you want achive and use it only if you want tell object to do something.
The second one is advanced tips for rspec. Especially I recommend to read rspec style guide - https://github.com/howaboutwe/rspec-style-guide but there is also other interesting tips ( like profilling how long your test took ). http://blog.joshsoftware.com/2013/11/23/pro-tips-for-writing-better-rspec-te...
I hope you enyou articles. Josef