Spell: Class Instance Variable

class_instance_variable.rb

# ==============================
# Spell: Class Instance Variable 
# ==============================

# Store class-level state in an instance variable of the Class object.

class C
  @my_class_instance_variable = "some value"

  def self.class_attribute
    @my_class_instance_variable
  end
end

C.class_attribute # => "some value"

# For more information: http://www.pragprog.com/titles/ppmetr/metaprogramming-ruby