Ruby on Rails: Template Engine with Slim and Haml: Learn how to use properly the two most famous template engine.

Template engines or template systems are a technology used to separate data from the view template server, increase the flexibility of the visual part and easing the code reuse. The most used, currently, for the Ruby language are haml, slim and mustache. The Ruby on Rails framework already comes with the templating system ERB, but many prefer to change it, due to performance issues, documentation or complexity.