gistfile1.txt

module Module2
  class Class2
    include Module2
  end

  def version
    return "0.1.0"
  end
end
include Module2
# if this function name is version instead of version2 we get 
#test_module.rb:28:in `<main>': private method `version' called for Module2:Module (NoMethodError)
def version
  return "0.2.0"
end


x = Module2::Class2.new
#  this puts "#{Module2.version}" won't work without include

puts "#{x.version}"
puts "#{Module2::Class2.new.version}"
# can't do puts "#{Module2.version}" when version not renamed to version2
#puts "#{Module2.version}"
puts "#{version}"

#result
#0.1.0
#0.1.0
#0.2.0