Ruby: 絶対パスでメソッドを呼び出す。 ref: http://qiita.com/Yinaura/items/bbad6d788f2a0d5463f0

book.rb

class Book
  def self.example
    p 'Class'
  end
end

module Example
  class Book
    #このモジュールの example を呼ぶ
    def self.call_module_method
      Book.example
    end

    # 普通のClass の example を呼ぶ
    def self.call_class_method
      ::Book.example
    end

    def self.example
      p 'Module'
    end
  end
end

Example::Book.call_module_method
Example::Book.call_class_method

file0.txt

Book.example

file1.txt

::Book.example

file2.txt

::Book.example

file3.txt

"Module"
"Class"

file4.txt

"Module"
"Class"