Regex means Regular Expression. It's a pattern-matching language for finding data in text. This is how you can take a URL & break it down into pieces. For example : https (the procotol) hashnode.com (the domain) /post (the path) Most programming languages implement regular expressions, so it's not a feature exclusive to Ruby :) Hope that helps.

I made this tutorial for complete beginners: https://www.rubyguides.com/ruby-tutorial It covers what you need to know to get started. Including topics like: Variables Conditional statements Loops OOP (Object-Oriented Programming) Strings, Arrays & Hashes Thinking like a developer Ruby gems You can read it here for free.

Like others already mentioned... ...this problem comes from not understanding Ruby itself & the basics of programming. You can't skip that part. That's why I wrote a complete Ruby tutorial that covers what someone should know before starting with Rails: https://www.rubyguides.com/ruby-tutorial/ Hope it helps :)

I wrote this article on how Ruby hides some errors from you :) http://www.rubyguides.com/2017/12/ruby-hiding-errors/