I’ve written a book all about strings and encodings in Ruby. Strings and encodings? A whole book? Take a moment to consider the types of Ruby objects you use the most. I’ll wager strings are at the top of that list. How much do you know about them? In the forward to the book, Richard Schneeman wrote, “It wasn’t until I came across this book that I realized how deep the string “rabbit hole” went.”

https://aaronlasseigne.com/books/mastering-ruby/strings-and-encodings/