Short Introduction on what gist is

gistfile1.rb

=begin
You create your code here, and then click on paste... and then others can get
the link that is created, and can potentially fork it and make changes to 
their own versions.
=end

def hello_world
  "Hello, world!"
end

=begin
It also lets you download the file, so it makes it nice for code sharing, as
well.
=end