Ruby was created in 1993 by Yukihiro Matsumoto to balance functional and imperative programming. It is a dynamic, reflective object-oriented scripting language that is simple, powerful, and flexible. Key features include being highly readable, having a interactive shell, embracing object-oriented programming, and having a large ecosystem including Ruby on Rails.

1. Ruby

2. Who am I?
1- Bunlong Van
2- Sreyleap Lay,
3- Chhon Meily
Work @yoolk
Blog: https://wowcode.wordpress.com/
Email: bunlong.van@gmail.com

3. History
- Ruby was conceived on February 24, 1993 by Yukihiro Matsumoto who wished
to create a new language that balanced functional programming with
imperative programming.
-purpose of Ruby language help every programmer in the world to be productive,
and to enjoy programming, and to be happy

4. What is Ruby?
- Ruby is a dynamic, reflective, general-purpose object-oriented programming
language that combines syntax inspired by Perl with Smalltalk-like features.
- Interpreted Script Language
- Ruby was first designed and developed in the mid-1990s by Yukihiro „Matz‟
Matsumoto in Japan.
- The standard 1.8.7 implementation is written in C.

5. Good point of Ruby
Reduce code
• Java
public class HelloWorld {
public static void main(String args[]) {
System.out.println(“Hello World”);
}
}
• Ruby
puts “Hellow World”

6. • Communities
• Code is Human-Readable: The code was designed from the start to be human-
readable and this means that non-programmer can have a very easy to understand
what a program is designed to do.
• Ruby on Rails: A Model-View-Controller framework for creating database-driven
websites in Ruby. Rails is build on simple concepts. (http://guides.rubyonrails.org/)

7. • RubyGems: A package manager for the Ruby programming language that
provides a standard format for distributing Ruby programs and libraries (in a self-
contained format called a “gem”), a tool designed to easily manage the installation
of gems, and a server for distributing them. (http://rubygems.org/)
• Command-line: The interactive Ruby shell is a unique feature that allows
developers to maintain and experiment with commands. There is no need to write
webpages and check their functionality in a browser.
• Object-Oriented-Programming (OOP): Object-Oriented-Programming is a
necessity for clean and maintainable code. However, In Ruby, everything is an object
.
Ex: 5.class #=> Fixnum
“Ruby” #=>.class String
nil.class #=> NilClass
Fixnum.class #=> Class

8. • Ruby is free
• Encourage testing
- Test::Unit builds in into standard library
- Other tools: Rspec, …
Ruby online resources:
- Try Ruby - http://tryruby.org
- Hackety Hack - http://hackety.com/
- Ruby Monk – http://rubymonk.com/
- New Boston Videos - http://thenewboston.org/list.php?cat=50
- Ruby Notes - http://rubylearning.com/satishtalim/tutorial.html
- Ruby Documentation - http://www.ruby-lang.org/en/ & http://ruby-doc.org/
- Ruby Conference Videos - http://confreaks.com/events
- Ruby Koans - http://koans.heroku.com/
- Ruby Regex – http://rubular.com/
- Ruby Online Quiz/ Exam - http://rexaminator.com/
- Nettuts+ Ruby for Newbies Sessions –
http://net.tutsplus.com/sessions/ruby-for-newbies