Another example of ruby modules, this time to illustrate static and non static methods inside a module.

modules2.rb

module ModuleExample
  def self.hello_world
    puts 'This is a static hello world from a module'
  end

  def hello_world
    puts 'This is a non static hello world from a module'
  end
end

ModuleExample::hello_world

begin
  imposible = ModuleExample.new
rescue NoMethodError
  puts 'You can\'t create an instance of a Module'
end