Another List-Related Asymmetry — A long time ago, I wrote an article about The Asymmetry of ++, thanks to Fede Bergero’s findings. Let’s add a few more asymmetries to that list… Note: This article is based on OTP23. Many things have been improved since that version already. Introduction Initially, I thought about writing this article…

Mi Reseña — Luego de casi quince años de trabajar, enseñar y difundir Erlang por el mundo, recién hace unos pocos días tuve la posibilidad de leer mi primer libro sobre Erlang en castellano. Se trata del libro que da título a este artículo y está escrito por Manuel Rubio. …

Some dead code that not even Dialyzer can find — It’s relatively unusual to watch me talking about the shortcomings or limitations of such an excellent tool as Dialyzer. Still, today I found some very dead code blocks that slipped through its world-famous success type analysis. So, since Halloween is close, let’s raise some dead code from its grave! When Dialyzer produces a Warning So…

The impressive Galician contributions to the Erlang Ecosystem — We all know about the most renowned Erlang/Elixir centers worldwide, like Sweden, Brazil, California, and London. But the community, even when not huge, is broadly spread. Today we want to celebrate a smaller region that’s home to many amazing contributions to our beloved ecosystem. The birthplace of my ancestors: Galicia! …

The erlang:process_info/1,2 version — DISCLAIMER This article is not meant to be an instructive one. It’s written just for fun! 🙃 Erlang is famous for its introspecting powers. You can get a lot of information about the processes running in your nodes without any external tool. …

…or is it to Erlang Pattern-Matching? — Working as a mentor in the Education Working Group at The EEF, there are several tiny simple lessons that I’ve delivered over and over again. The one in this article is so common that I already gave it a name: The Robot Butt Rule. The rule goes like this… To…

Or how to use Pattern-Matching for Tests — While acting as a mentor on the FutureLearn MOOC about Erlang I presented an idea that folks like Adolfo Neto loved (he even tweeted about it 🧡). It is, in fact, the way I introduce people to pattern-matching when I’m teaching them Erlang. It’s a way to write tests that…

So, I just watched Michał Muskała’s talk at CodeBEAMSF, and I have something to say… As you might know, I’m also working with Juan Bono, Diego Calero, Facundo Olano, and others on our own formatter for Erlang (just like Daniel Tipping is working on steamroller). …

Particularly for Erlang — So, I Gusti Ngurah Oka Prinarjaya was reading Joe’s Book and he found one of the most amazing examples of List Comprehensions I’ve ever seen… perms([]) -> [[]]; perms(List) -> [ [H|T] || H <- List, T <- perms(List--[H]) ]. Output: 1> lib_misc:perms("123"). ["123","132","213","231","312","321"] And, of course… he couldn’t understand it…