How to access a method in the parent class

[Iñaki Baz Castillo]

Hi, I'll explain my problem with an example code:

=2D----------------------
module M
def hello
puts "hello !!!"
B.new
end
=09
class B
def initialize
puts "B instance initialized !!!"
bye() <--- ERROR !!!!
end
end
end


class A
include M

def bye
puts "bye !!!"
end
end


a =3D A.new
a.hello
=2D----------------------


I want the following behaviour:

irb> a.hello
=3D> "hello !!!"
=3D> "B instance initialized !!!"
=3D> "bye !!!"


But the last bye() gives an error since, of course, "bye" is not defined in=
B=20
class, but in A class.

I know that if it would be:
=2D-----------------
module M

def hello
puts "hello !!!"
bye
end

end

irb> a.hellp
=2D-----------------
This works since "bye()" calls the "bye" method in class A. But this is not=
my=20
case.

How could I call A#bye method from M::B class?

Thanks a lot.



=2D-=20
I=C3=B1aki Baz Castillo

 

[James Coglan]

Hi, I'll explain my problem with an example code:

-----------------------
module M
def hello
puts "hello !!!"
B.new
end

class B
def initialize
puts "B instance initialized !!!"
bye() <--- ERROR !!!!
end
end
end


class A
include M

def bye
puts "bye !!!"
end
end


a =3D A.new
a.hello
-----------------------


I want the following behaviour:

irb> a.hello
=3D> "hello !!!"
=3D> "B instance initialized !!!"
=3D> "bye !!!"


But the last bye() gives an error since, of course, "bye" is not defined = in
B
class, but in A class.

I know that if it would be:
------------------
module M

def hello
puts "hello !!!"
bye
end

end

irb> a.hellp
------------------
This works since "bye()" calls the "bye" method in class A. But this is n= ot
my
case.

How could I call A#bye method from M::B class?

Thanks a lot.

To call a method from another class in the context of an instance of B, put
this inside M::B#initialize:

A.instance_methodbye).bind(self).call()

Hard to tell from this code, seeing as how it does nothing apparently
useful, but if you find yourself doing this it may be a sign that you need
to rethink your design.

 

[Iñaki Baz Castillo]

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