Superclass table inheritance

Hello,

I am trying to find a way to preserve the same class name without having
to cut and paste code from one class to another. How do I do something
such as:

test1.rb

class A
def initialize
echo “Initailizing class A.”
end
end

test2.rb

require ‘test1’

class A
def initialize
super
echo “Initializing class A again.”
end
end

a = A.new

Expected output:

Initailizing class A
Initializing class A again.

I know this is not best practice, and that I should be using a different
name for my child class I am deriving off the superclass, but I was just
wanting to know if it is actually doable.

Thanks.

Inheritance does it nicely:

class A
def initalize
puts “Initializing class A”
end
end

class B < A
def initialize
super
puts “Initalizing class B”
end
end

On Jan 10, 2008 8:41 AM, Russell McConnachie [email protected]
wrote:

def initialize
super

I know this is not best practice, and that I should be using a different
name for my child class I am deriving off the superclass, but I was just
wanting to know if it is actually doable.

Thanks.


Ryan B.
http://www.frozenplague.net
Feel free to add me to MSN and/or GTalk as this email.

Hi Ryan,

I was actually looking at using the same class name. I didn’t think it
was possible but was wondering. In ruby you can override any method as
you wish dynamically. So defining class A twice with two initialize
functions will not work because the second defined class of the same
name will override the first.

Not quite override, more like extending.

Re-defining a class in Ruby extends that class, but redefining a method
on a
class will override that method, like what you’re finding out now.

On Jan 10, 2008 9:32 AM, Russell McConnachie [email protected]
wrote:

Inheritance does it nicely:
puts “Initalizing class B”
I am trying to find a way to preserve the same class name without
end
end
different


Ryan B.
http://www.frozenplague.net
Feel free to add me to MSN and/or GTalk as this email.

On Jan 9, 2:11 pm, Russell McConnachie [email protected] wrote:

I know this is not best practice, and that I should be using a different
name for my child class I am deriving off the superclass, but I was just
wanting to know if it is actually doable.

No, there can only be one class by a given name, and it can’t derive
from itself.

What is your goal?

///ark

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