gistfile1.rb

class PushIt

  def initialize
     @whatsits = []
  end

  def <<(*args)
    @whatsits << args
  end

  def count
    @whatsits.size
  end

  def size
    @whatsits.size
  end
end
pi = PushIt.new
# => #<PushIt:0x1133fc0 @whatsits=[]>
pi << 1
#=> [[1]]
pi << 2
#=> [[1], [2]]
 pi << 3
#=> [[1], [2], [3]]
>> pi.size
# => 3