naive_1010

Environment variables are variables passed to programs by the command line or the graphical shell. Though there are a number of environment variables that only affect the command line or gr...

#print some environment variables puts ENV["PATH"] puts ENV["EDITOR"]  

http://www.tutorialspoint.com/ruby/ruby_environment_variables.htm    How to use Ruby to access Envrionment variables?

If you’ve worked with Ruby for at least a little while, you might already know that classes in Ruby are objects themselves, in particular, instances of Class. Before I get into the fun stuff, let’s q...