Just how wrong is this? It works, but it feels dirty to call a method on the child class when it's not fully initialized yet.

base.rb

class Base
  def initialize
    @var = []
    init_var
  end
  
  def size_of_var
    @var.size
  end
end

runner.rb

o = Sub.new
o.size_of_var    # should return 4

sub.rb

class Sub < Base
  def init_var
    @var = %w( some list of elements )
  end
end