It's also worth mentioning the Enumerable module that can be mixed in to classes, which gives you `map`, `select`, and much more for free by implementing `each`

It's also worth mentioning the Enumerable module that can be mixed in to classes, which gives you `map`, `select`, and much more for free by implementing `each`. https://ruby-doc.org/core-3.0.2/Enumerable.html https://ruby-doc.org/core-3.0.2/Enumerable.html