simple cyclic iterator(cannot be used on multithread environment)

cyclic_iterator.rb

class CyclicIterator

  def initialize(collection)
    @collection = collection
    @i = 0
  end

  def next
    item = nil
    item = @collection[@i]
    @i += 1
    @i = 0 if @i == @collection.size
    return item
  end

end

# c = CyclicIterator.new([1, 2, 3])
# p c.next #=> 1
# p c.next #=> 2
# p c.next #=> 3
# p c.next #=> 1