[SOLVED] Create a new instance of parent's class variable for each child class

Create a new instance of parent's class variable for each child class

I have this parent class:

class ListBase
  @@list = []

  def self.list
    @@list
  end
end

I'm trying to create two child classes like so:

class Child1 < ListBase
end

class Child2 < ListBase
end

I was under the impression that each of these child classes will have their own @@list class variable. However, I get this:

Child1.list.push(1)
Child2.list.push(2)
Child1.list # => [1, 2]
Child2.list # => [1, 2]

which means the child classes share the @@list from the parent class.

How can I create a separate class variable for each of the child classes without repeating?

Solution

As @CarySwoveland comments, in your use case, you should use a class instance variable:

class ListBase
  @list = []

  def self.list
    @list
  end
end

Not even sure why you thought of using a class variable for your use case.