Setup RVM + Ruby + Rails + Gemset

Setup rvm  

1. sudo apt-get install curl git-core
2. copy/paste following lines in terminal
   bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer )
   echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function' >> ~/.bashrc
   source ~/.bashrc
   type rvm | head -1
   rvm requirements
   Install rvm dependencies
   rvm list known

Install Ruby 

1. ​rvm install 1.8.7
2. rvm use 1.8.7 #Set 1.8.7 
3. ruby -v #Check ruby version

Setup gemset 

1. ​rvm gemset create project_name
2. rvm 1.8.7@project_name
3. gem install rails

Setup gemset for your project

1. Go to your project directory
2. rvm --rvmrc --create 1.8.7@project_name

Ubuntu Hotspot/router

Make your ubuntu hotspot/router

• Go to Network
• Choose Wireless
• Click on Use as Hotspot
• After that It display Network Name and Security Key
• Now Open another computer and look for available wifi connections
• Ubuntu's Network Name should appear in the another computer
• Select the Ubuntu's Network Name and Insert the Security Key
• Voila!! That's It

Java and JRuby Setup

Steps to setup JRuby on windows

• Download the latest stable version of JDK from:  http://www.oracle.com/technetwork/java/javase/downloads/index.html 
• I have installed Java SE 7u3.

• Set the system environment variables like classpath, path and JAVA_HOME. I have this on my Windows 7: 
• path=C:\Program Files\Java\jdk1.7.0_03\bin; 
• classpath=%classpath%;.;
• JAVA_HOME=C:\Program Files\Java\jdk1.7.0_03; 
• Download the JRuby from this link  http://jruby.org/download as a .zip file for windows.

• Extract the file to C:\ directory.
• Set the system environment variables like path and JRUBY_HOME
• path=C:\jruby-1.6.7\bin
• JRUBY_HOME= C:\jruby-1.6.7
• To test whether JRuby is properly installed or not. Type  "jruby -v" on the command prompt.

Ruby Questions And Answers

Ruby Require VS Load VS Include VS Extend. Here are the differences between Require, Load, Include and Extend methods

http://ionrails.com/2009/09/19/ruby_require-vs-load-vs-include-vs-extend/

http://railstips.org/blog/archives/2009/05/15/include-vs-extend-in-ruby/

What is Procs, Blocks, Lambda ?

http://eli.thegreenplace.net/2006/04/18/understanding-ruby-blocks-procs-and-methods/

http://www.robertsosinski.com/2008/12/21/understanding-ruby-blocks-procs-and-lambdas/

http://railsguru.org/2010/03/learn-ruby-procs-blocks-lambda/

Ruby Metaprogramming 

http://ruby-metaprogramming.rubylearning.com/

http://viewsourcecode.org/why/hacking/seeingMetaclassesClearly.html

Modules vs. Classes

http://www.rootr.net/rubyfaq-8.htmlhttp://stackoverflow.com/questions/2427804/ruby-on-rails-modules-vs-classes

http://dthg.net/blog/index.php/archives/2007/03/13/ruby-classes-vs-modules/