Ruby Variables: How to Use Them & What Types Are Available
Using Variables in Ruby
Ruby Programming Tutorial | Creating Variables And Constants - YouTube
Instance Variables in Ruby
Environment Variables in Ruby on Rails | Altoros
Classes, Objects, and The Dude
What is the purpose of setting Ruby block local variables when blocks have their own scope already? - Stack Overflow
The Rubyist's Guide to Environment Variables - Honeybadger Developer Blog
Global Variables in Ruby - Getting De-railed
Ruby On Rails Archives - Buffercode
Ruby variables and their scope. What is a variable in Ruby? It is a… | by Sarvar Khalimov | Easy Ruby: All you need to know about Ruby programming language | Medium