Posts in English

Empirical knowledge formalization in project retrospectives

All software projects are challenging, although not all at the same level. Even the easiest projects are tough and demand attention in order to make good decisions and adjust the course. There are plenty of ways of doing so, like sprint retrospectives, where the good and the bad things are exposed and discussed. But, another … »

The pros and cons of 4 deployment process techniques

The way of deliver your product code to your customer is commonly called “deployment”. It is an important matter because it will impact in how fast your product will respond to changes and the quality of each change. Depending on which deployment decision you take, it will impact your team and how you use your … »

XSS vulnerability on Simple Form

There is a XSS vulnerability on Simple Form’s error options. Versions affected: >= 2.0.0 Not affected: < 2.0.0 Fixed versions: 3.1.0, 3.0.3, 2.1.2 Impact When Simple Form renders an error message it marks the text as being HTML safe, even though it may contain HTML tags. In applications where the error message can be provided … »

Converting Erlang code into Elixir

When you are new to any language, you probably want to run some existing code just to see how it works. Achieving success while trying new things is important, because it helps fueling your interest. The number of code examples in Elixir is increasing, but sometimes you will have to read some Erlang code. Recently, … »

How to serialize Date and DateTime to JSON without losing information

When building APIs, it is pretty common to use JSON as a serialization format. JSON defines serialization for boolean, number and string, but not for date/datetime values. What most serializers do with Date and DateTime values is to use the ISO8601 standard. For example: # Date format 2011-07-14 # DateTime format 2011-07-14T19:43:37+0100 However, you should … »

Playing with Elixir and Go concurrency models

In Go Concurrency Patterns talk, Google I/O 2012, presenter Rob Pike demos some great concurrency features from Go, like channels and Go routines, and how it can be used to build fast, replicated and robust software. Concurrency patterns is a very interesting topic but there was one statement in special that got me thinking: “The … »