#after setting up mongoid and requiring ThinkingLobster
class FlashCard
  include Mongoid::Document
  include ThinkingLobster

  field :question
  field :answer

end

q = FlashCard.create(question: 'First American President', answer: 'George Washington')

q.review_time
# => 2013-10-19 22:06:28 -0700

# Marks the item correct and automatically lengthens the time until next review.
q.mark_correct!
# => #<FlashCard 0x123>

# Marking it wrong will intelligently shorten the time until next review.
q.mark_incorrect!
# => #<FlashCard 0x123>

q.previous_review?
#returns instance of Time
# => 2013-10-19 22:06:28 -0700

q.time_since_due
#Returns number of seconds since it was due
# => 2335243423

# The point of using an SRS is reviewing LESS, not more.
# This method lets you know if its not time to review yet...
q.too_soon?
# => true

#When things go wrong...
q.reset
q.save
# Resets all learning data for a particular item.

# A bunch of configurations...
ThinkingLobster.config
# => {:cutoff=>129600, :first_interval=>7200, :new_positive_multiplier=>2.0, :old_positive_multiplier=>1.25, :penalty=>0.25}

# If you know what you are doing, you can change them like this...
ThinkingLobster.config.merge!(penalty: 0.5)
# => {:cutoff=>129600, :first_interval=>7200, :new_positive_multiplier=>2.0, :old_positive_multiplier=>1.25, :penalty=>0.5}
# Don't do that unless you have a reason to, though.