How do I add 'each' method to Ruby object (or should I extend Array)?

Question

I have an object Results that contains an array of result objects along with some cached statistics about the objects in the array. I\'d like the Results object to

Answer 1

If you really do want to make your own #each method, and assuming you don't want to forward, you should return an Enumerator if no block is given

class MyArrayLikeClass
  include Enumerable

  def each(&block)
    return enum_for(__method__) if block.nil?
    @arr.each do |ob|
      block.call(ob)
    end
  end
end

This will return an Enumerable object if no block is given, allowing Enumerable method chaining