I’ve been working on Plataformatec for 5 years and one common mistake that I see developers making is hiding the error, instead of fixing the problem. This kind of behaviour can turn your product full of problems quickly by having a codebase with unnecessary defensive programming. Let’s explore that by taking a look at an … »

This year The Pragmatic Bookshelf and I released the Learn Functional Programming With Elixir book, and its first chapter is available here. It took me one year and a half to finish the book. Yeah, it took a long time! Why did it take that long? I think the main reason is: all my researching, … »

Over the last few weeks, we have been building a web application in one of our clients and ended up duplicating some template code. These new pages had something in common between them, but not with the rest of the application. We needed an inner layout to reuse the template code between these pages, however, … »

Last week, The Pragmatic Bookshelf started the sales of Learn Functional Programming with Elixir written by me, now in beta. After one year of hard work, we are finally publishing the beta version of the book. In this blog post, I’ll tell you about the motivation for writing a book, its contents and its future. … »

In this blog post, I’ll explain the problem of developers spending too much time trying to discover a problem in a failing test suite. A cause of this issue may be the lack of a good test feedback. A good feedback is one that happens fast with a helpful message. To illustrate this problem, consider … »

The Rails 5 release candidate is out, bringing new improvements that will make your life as a developer easier. Probably you are excited to update your application to the new major Rails release, but you may have some concerns. It is normal, updating your application to fit the new version may bring an unknown number … »