From: Zellyn Hunter <ruby-list@...>
Date: 2003-06-19T09:17:48+09:00
Subject: Class variables in parent and child classes with the same name

Am I misunderstanding something, or can you not give a child class a class 
variable with the same name as a parent class?  Just curious.

It seems to work as one would expect for constants, but obviously one couldn't 
use a constant to keep track of information.

[Note that ruby -w catches the redefinition]

Zellyn


class Parent
  Version = 1
  @@count = 1

  def printCount
    puts @@count
  end

  def printVersion
    puts Version
  end
end

class Child < Parent
  Version = 2
  @@count = 2

  def showCount
    puts @@count
  end

  def showVersion
    puts Version
  end
end

p = Parent.new
c = Child.new

c.printCount      # => 2
c.showCount       # => 2
p.printCount      # => 2

c.printVersion    # => 1
c.showVersion     # => 2
p.printVersion    # => 1