Base class method Need base class value

ruby-talk
1

Could anybody suggest what am i suppose to do for below problem.

Class Base

  def age
      return 18
  end

  def getOldAge
      age
  end
end

Class Der < Base
   def age
       return 19
   end
end
ob = Der.new()
ob.getOldAge()

above run command will give me output as 19. Because its now overridden
by Der class and its 'age' method.

So,
Question is
1. Is it possible for getOldAge method from base class to call its own
class method age? Means which returns 18, not 19. In base class, i
should have control for accessing only my class method regardless of
overriding existing class by some else class.

-Thanks in advance.

···

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2

looks awkward but possible

# in class Base
def getOldAge
   Base.instance_method(:age).bind(self).call
end

···

On Thu, Dec 23, 2010 at 00:22, Karan Rajput <ganeshgirase@gmail.com> wrote:

1. Is it possible for getOldAge method from base class to call its own
class method age? Means which returns 18, not 19. In base class, i
should have control for accessing only my class method regardless of
overriding existing class by some else class.

--
OZAWA Sakuro

"I think we can agree, the past is over." - George W. Bush

3

Try this... and let me know if it worked for you.

class Base

def age
     return 18
end

def getOldAge
     age
end
end

class Der < Base

  # alias the ancestor age methods before overriding
  alias :base_age :age

  def age
      return 19
  end

  def getOldAge
    base_age
  end
end

ob = Der.new()
ob.getOldAge()

···

On Wed, Dec 22, 2010 at 1:23 PM, OZAWA Sakuro <sakuro@2238club.org> wrote:

On Thu, Dec 23, 2010 at 00:22, Karan Rajput <ganeshgirase@gmail.com> wrote:

1. Is it possible for getOldAge method from base class to call its own
class method age? Means which returns 18, not 19. In base class, i
should have control for accessing only my class method regardless of
overriding existing class by some else class.

looks awkward but possible

# in class Base
def getOldAge
Base.instance_method(:age).bind(self).call
end

--
OZAWA Sakuro

"I think we can agree, the past is over." - George W. Bush