marvelous_iterator

External iterators in Ruby. Inspired by Wesleys "Design Patterns in Ruby"

Installation

Add this line to your application's Gemfile:

gem 'marvelous_iterator'

And then execute:

$ bundle

Or install it yourself as:

$ gem install marvelous_iterator

Usage

Example usage (notice, that spaceship operator must works with elements between given arrays):

def self.merge(mts_schedules_array, mts_bookings_array)
  merged_time_slots = []
  mts_schedules_iterator = SortedArrayIterator.new(mts_schedules_array.flatten)
  mts_bookings_iterator = SortedArrayIterator.new(mts_bookings_array)
  while( mts_schedules_iterator.has_next? and mts_bookings_iterator.has_next? )
    if mts_schedules_iterator.item == mts_bookings_iterator.item
      mts_schedules_iterator.next_item
      merged_time_slots << mts_bookings_iterator.next_item
    elsif mts_schedules_iterator.item < mts_bookings_iterator.item
      merged_time_slots << mts_schedules_iterator.next_item
    else
      merged_time_slots << mts_bookings_iterator.next_item
    end
  end
  # Pick up the leftovers from mts schedules array
  while( mts_schedules_iterator.has_next?)
    merged_time_slots << mts_schedules_iterator.next_item
  end
# Pick up the leftovers from mts bookings array
while( mts_bookings_iterator.has_next?)
  merged_time_slots << mts_bookings_iterator.next_item
end
dayplans = []
merged_time_slots.group_by{|ts| ts.start.to_date}.map do |mts|
  dp = DayPlan.new(
    :date => mts[0].to_date,
    :periods => mts[1]
  )
end

end

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request