An exploration of Elixir, a functional programming language running on the Erlang VM. Discusses functional programming benefits for multi-core processing without thread safety issues, Erlang's role in enabling concurrent systems, actor model, pattern matching, and how Elixir builds on these foundations with modern syntax.

Solving Project Euler problem 001 in multiple programming languages to maintain skills. The problem asks for sum of all multiples of 3 or 5 below 1000. Includes solutions in JavaScript (both original and ES6), Ruby, Groovy, and Python, with plans to add Clojure solutions for cross-language functional programming practice.