Posts in English

Using the test pyramid to have better feedback from your test suite

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 … »

Highlights of RubyConf Brazil 2016

Last week happened the biggest Ruby-related conference in Latin America, RubyConf Brazil. Our team was present in this edition, which by the way, was particularly interesting, therefore I’d like to share some highlights. The first highlight comes from the night before the event. We went to a bar with some conference speakers. It was really … »

Dynamic forms with Phoenix

Today we will learn how to build forms in Phoenix that use our schema information to dynamically show the proper input fields with validations, errors and so on. We aim to support the following API in our templates: <%= input f, :name %> <%= input f, :address %> <%= input f, :date_of_birth %> <%= input … »

Elixir Radar is more than a weekly newsletter now. It’s a channel.

Yeah! I’m excited to tell you we’re expanding Elixir Radar from a weekly newsletter to a channel you visit to find Elixir related stuff that matters — or when you don’t have time (or patience) to look around the web. In January 2015, Hugo Baraúna (co-founder at Plataformatec) created Elixir Radar as a weekly newsletter … »

Case Study of a WIP Limit Implementation: Why, When and How to use WIP Limits

When you are learning about Kanban, one of the first things you hear is “always limit WIP, you should”, or a less Yoda-ish version of it. But when you decide that you will indeed use WIP limits and google “WIP Limits for dummies”, you won’t discover any walkthroughs or easy-to-implement equations to discover what limit … »

Forecasting software project’s completion date through Monte Carlo Simulation

Nowadays we are using a more probabilistic approach to manage our processes than deterministic. That means that we use different statistical methods to predict the future instead of blind estimations. But wait… wasn’t unpredictability one of the main reasons that made us change from Waterfall to Agile? Yes, uncertainty is inherent to software development. For … »