Use-case oriented rails applications

I will bring here an approachable solution for building rails applications using some fundamentals of the so called clean architecture. But, what is it? It's hard to tell what is clean architecture without telling about the problem. The problem is, look at your rails application, try to identify what it does, open your `app` folder and try to identify again. The clean architecture came to try to solve this problem.

Notes about the pragmatic programmer

I thinkg that the pragmatic programmer by Andrew Hunt and David Thomas is the most important book for programmers and I have some notes about it and I keep them always with me to remember the things I learned.