Invisible methods and inheritance

[Leslie Viljoen]

Hello!

Does anyone know the reason for the following?

p rio('.').all.dirs.methods.include?("each")
p rio('.').all.dirs.methods.respond_to?("each")

false
true

I can call dirs.each, but I am trying to trace which .each method is
called in the rio source. Also how can I find the parent/superclass
class of a class? (ie. something like Array.parent?)

Les


--=20
If you could create a machine that copies hamburgers =97 you put one
hamburger in and two equally good hamburgers come out the other side =97
it would be unethical not to do so and make it freely available.

 

[Ryan Davis]

Hello!

Does anyone know the reason for the following?

p rio('.').all.dirs.methods.include?("each")
p rio('.').all.dirs.methods.respond_to?("each")

I think you meant:

p rio('.').all.dirs.respond_to?("each")

you don't want to ask the result of methods if IT responds to each,
you want to ask the result of dirs.

I can call dirs.each, but I am trying to trace which .each method is
called in the rio source.

Don't forget that things like method_missing (and even respond_to?)
can be overridden.

Also how can I find the parent/superclass
class of a class? (ie. something like Array.parent?)

=> Object

Remember, ri is your friend, just ask it what you asked us and you'll
often find your answer:

% ri superclass
------------------------------------------------------- Class#superclass
class.superclass -> a_super_class or nil
------------------------------------------------------------------------
Returns the superclass of _class_, or +nil+.

File.superclass #=> IO
IO.superclass #=> Object
Object.superclass #=> nil

 

[Leslie Viljoen]

I think you meant:

p rio('.').all.dirs.respond_to?("each")

you don't want to ask the result of methods if IT responds to each,
you want to ask the result of dirs.


Don't forget that things like method_missing (and even respond_to?)
can be overridden.

=3D> Object

Remember, ri is your friend, just ask it what you asked us and you'll
often find your answer:

% ri superclass
------------------------------------------------------- Class#superclass
class.superclass -> a_super_class or nil
------------------------------------------------------------------------
Returns the superclass of _class_, or +nil+.

File.superclass #=3D> IO
IO.superclass #=3D> Object
Object.superclass #=3D> nil

Thanks Ryan. It seems I am much more tired than I thought I was ;-)


--=20
If you could create a machine that copies hamburgers =97 you put one
hamburger in and two equally good hamburgers come out the other side =97
it would be unethical not to do so and make it freely available.