class ActiveRecall::FibonacciSequence

Constants

SEQUENCE

Attributes

box[R]
current_time[R]
times_right[R]
times_wrong[R]

Public Class Methods

new(box:, times_right:, times_wrong:, current_time: Time.current) click to toggle source
# File lib/active_recall/algorithms/fibonacci_sequence.rb, line 23
def initialize(box:, times_right:, times_wrong:, current_time: Time.current)
  @box = box
  @current_time = current_time
  @times_right = times_right
  @times_wrong = times_wrong
end
right(box:, times_right:, times_wrong:, current_time: Time.current) click to toggle source
# File lib/active_recall/algorithms/fibonacci_sequence.rb, line 5
def self.right(box:, times_right:, times_wrong:, current_time: Time.current)
  new(
    box: box,
    current_time: current_time,
    times_right: times_right,
    times_wrong: times_wrong
  ).right
end
wrong(box:, times_right:, times_wrong:, current_time: Time.current) click to toggle source
# File lib/active_recall/algorithms/fibonacci_sequence.rb, line 14
def self.wrong(box:, times_right:, times_wrong:, current_time: Time.current)
  new(
    box: box,
    current_time: current_time,
    times_right: times_right,
    times_wrong: times_wrong
  ).wrong
end

Public Instance Methods

right() click to toggle source
# File lib/active_recall/algorithms/fibonacci_sequence.rb, line 30
def right
  {
    box: box + 1,
    last_reviewed: current_time,
    next_review: next_review,
    times_right: times_right + 1,
    times_wrong: times_wrong
  }
end
wrong() click to toggle source
# File lib/active_recall/algorithms/fibonacci_sequence.rb, line 40
def wrong
  {
    box: [0, box - 1].max,
    last_reviewed: current_time,
    next_review: nil,
    times_right: times_right,
    times_wrong: times_wrong + 1
  }
end

Private Instance Methods

fibonacci_number_at(index) click to toggle source
# File lib/active_recall/algorithms/fibonacci_sequence.rb, line 56
def fibonacci_number_at(index)
  if (0...SEQUENCE.length).cover?(index)
    SEQUENCE[index]
  else
    fibonacci_number_at(index - 1) + fibonacci_number_at(index - 2)
  end
end
next_review() click to toggle source
# File lib/active_recall/algorithms/fibonacci_sequence.rb, line 64
def next_review
  current_time + fibonacci_number_at(box + 1).days
end