![4. Initializing Instances: Off to a Great Start - Head First Ruby [Book]](https://www.oreilly.com/api/v2/epubs/9781449372644/files/httpatomoreillycomsourceoreillyimages2235080.png.jpg "4. Initializing Instances: Off to a Great Start - Head First Ruby [Book]")
4. Initializing Instances: Off to a Great Start - Head First Ruby [Book]
The Magic of Class-level Instance Variables | AppSignal Blog
Introduction to Ruby
Understanding the Ruby Object Model In Depth - Honeybadger Developer Blog
How to Check If a Variable is Defined in Ruby - RubyGuides
Global Variables in Ruby - Getting De-railed
Coding101: Ruby Classes Explained | by Jordan Poulton | Makers
Python Class Attributes: Examples of Variables | Toptal®
Ruby — @@, @, self and validation | by Jeff Simon | Medium
Classes and Instances in Ruby - DEV Community
Classes, Objects, and The Dude
Why the Instance Variable of the Super Class Is Not Overridden in the Sub Class - DZone
Understanding Ruby Classes
Ruby Programming/Syntax/Classes - Wikibooks, open books for an open world
Class Variables vs Instance Variables in Python
A Class in Ruby | Juzer Shakir | Medium
Ruby Variables | How to Declare & Initialize Variables in Ruby?
How to Use Ruby Variables
Week 5 Technical Blog - Ruby Classes
Ruby Variables - javatpoint
Lexical scoping and Ruby class variables - Honeybadger Developer Blog
Class Variables vs Instance Variables in Python
Instance Variable Performance | Tenderlove Making
Ruby programing tutorial - class inheritance & modules
Understanding Ruby Thread-Local Variables – RubyTapas
The Magic of Class-level Instance Variables | AppSignal Blog
Ruby Tutorial – Learn About Ruby for Free!
Ruby variable types and variable scope - YouTube
