While reading the early release version of Introducing Erlang, I began by copying the examples in the book. (This always helps me learn the material better.) I then began experimenting with small programs of my own to make sure I really understood the concepts. As I continued writing my own examples, I thought they might be useful to other people as well. I contacted Simon St. Laurent, the author of Introducing Erlang, and he liked the idea of having these companion exercises and suggested naming them études. At some point, the études took on a life of their own, and you are reading the result now.
I was learning Erlang as I was creating the solutions to the études, following the philosophy that “the first way that works is the right way.” Therefore, don’t be surprised if you see some fairly naïve code that an expert Erlang programmer would never write.
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