yielding cartesian product elements..

cartesian_product.rb

class CartesianProduct
  include Enumerable
  
  def initialize a,b
    @a,@b = a,b
  end
  
  def each
    @a.each do |a_element|
      @b.each do |b_element|
        yield [a_element,b_element]
      end
    end
  end
end

c = CartesianProduct.new([1, 2],[:hehe, :tareum, 6])
c.each {|el| p el}

c = CartesianProduct.new([:a,:b], [])
c.each {|el| p el}