How can a nested class access a method in the outer class in Ruby?

Question

def class A
  def a
    raise \"hi\" #can\'t be reached
  end

  class B
    def b
      a() #doesn\'t find method a.
    end
  end
end

I want to invok

Answer 1

This is just for the lulz:

class A
  def a
    puts "hello from a"
  end

  class B
    def b
      Module.nesting[1].new.a()
    end
  end
end