Design Pattern: Iterator and Movie Collections

array_iterator.rb

class ArrayIterator
  attr_reader :collection
  attr_accessor :current_index
  
  def initialize(collection)
    @collection = collection
    @current_index = 0
  end
  
  def has_next?
    current_index < collection.length
  end
  
  def next
    raise 'No more item left.' unless has_next?
    item = collection[current_index]
    self.current_index += 1
    item
  end 
end