Install Ruby On Windows or Linux

I.  Ruby Overview

RubyInstaller

II. Install Ruby

• In Windows
  Download and Install
  • Download rubyinstaller
  • Double click rubyinstaller.exe to install.
  Run
  • Finished, go to run -> cmd -> irb or run Interactive Ruby
• In Linux
  Install with yum
  • # yum install ruby
  Install other way
  • $ rpm -ivh install wget #Install wget for download package from internet
  • $ cd /tmp
  • $ wget > <source> /ruby-2.x.x #Download ruby from internet
  • $ rpm -ivh install ruby-2.x.x or $ yum install ruby-2.x.x
  Run
  • Finished, go to Terminal and enter irb

III. Test install

$ ruby -v

$ ruby -e "puts  'Hello World! '"

IV. More

Similar man command in shell, in ruby using ri command :

  # using ri command 
$ ri puts  # press q to quit 

Using Editor:

• # In Windows notepad++, RubyWin,...
• # In Linux vim, gedit, ...

Ruby Overview

I. Introduction

• Ruby is a pure object-oriented programming language.
• Creater by Matsumoto Yukihiro ( Matz), first version was releases in 1995.
• You can find the name Yukihiro Matsumoto on the Ruby mailing list at www.ruby-lang.org. Matsumoto is also known as Matz in the Ruby community.
• Ruby is Opensource, big open community. especially in USA and Japan.
• Ruby latest version : 2.2.
• Ruby also is a scripting language. ex: if you are not familiar with shell (in unix) or batch (in windows) , Ruby is good choice.
• Web framework written by Ruby : Ruby on Rails.
• Famous service in the world using Ruby as their backbone : Twitter, Github, Basecamp, Cookpad, SlideShare.

II. Ruby Feature

• Pure OOP (Object Oriented Programming).
• Class Base (vs prototype-based language as javascript).
• Dynamic language.
• Reflection.

III. Tools 

You will need a latest computer like Intel Core i3 or i5 with a minimum of 2GB of RAM (4GB of RAM recommended). You also will need the following software:

• Linux or Windows OS.
• Webserver : Apache,...
• Webbrowser: Chrome, IE, ...
• Ruby 1.9 or latest.

V. Why we love Ruby?

 
 # In C/C++ 

int main() {
 int t;
 for(int i = 0; i <3 class="str" data-blogger-escaped-i="" data-blogger-escaped-printf="" data-blogger-escaped-span=""> "Hello World! " 

); return 0; } }

 
 # In Ruby  

3.times { print  "Hello World! "  }

IV. What is next ?

• Install Ruby in Windows and Linux. Test command, using editor, ...
• Prepare an environment to develop Ruby applications.