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

I typically do something like this:

class A
  def a
    puts "hi"
  end

  def createB
    B.new self
  end

  class B
    def initialize(parent)
      @parent=parent
    end

    def b
      @parent.a
    end
  end
end

A.new.createB.b