This App covers the following topics in Ruby programming language.

Ruby: Getting Started
Ruby Introduction
Ruby Development Environment
Ruby Comments
Ruby Variables
Ruby Functions
Ruby Data Types
Ruby Operators
Ruby Conditional Statements
Ruby Loops
Ruby Arrays
Ruby Strings
Ruby Modules

Ruby Object Oriented Programming
Ruby Classes
Ruby Initializer
Ruby Access Modifiers
Ruby Inheritance
Ruby Polymorphism
Ruby Static Members
Ruby Inner Classes

Core Ruby: Collections & Data Structures
Ruby Hashes

Core Ruby: Advanced Topics
Ruby Exception Handling
Ruby Operator Overloading
Ruby Multithreading
Ruby I/O
Ruby Files I/O
Ruby Serialization
Ruby Database Connectivity
Ruby Networking