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module Enumerable
  def stable_sort(&block)
    block &&= Proc.new do |(x, i), (y, j)|
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# in ruby 1.8.7 or require 'backports'

title.rpartition(' > ').last

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require 'backports'

exceptions = exceptions.to_s.lines.to_a

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module Enumerable
  def frequency
    returning Hash.new(0) do |hash|
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FREQUENCY = { 'weekly' => 7, 'bi_monthly' => 14}.freeze
def check_appt_conflicts
  appointments.any? do |appointment|
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def prettify_output(rows)
  rows.map do |date, location, surface, price, tickets, winners|
    location, tourney = location.split("\n")
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def passes_luhn_check?(str)
  sum = 0
  numbers = str.split(//).map(&:to_i)
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def date_range_by_week(selected_date)
  first_in_calendar = selected_date.beginning_of_month.next_week(:monday) - 7
  (first_in_calendar...(first_in_calendar+7*6)).to_a.in_groups_of(7)
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def offset(selected_date)
  wday = selected_date.beginning_of_month.wday
  wday == 0 ? 6 : (wday - 1)
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class Asset < ActiveRecord::Base
	belongs_to :account
	belongs_to :asset_type
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class String
  # returns an array of unicode codepoints, in canonical order
  def split_codepoints
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def create_vouchercode
  begin
    self.vouchercode = generate_vouchercode(8)
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# We deal with the problem by writing classes of numbers in tree form.
# Leaves can be a specific number (Centile), a generic centile (GenericValue) or a subtree (another GenericNumber).
# Each such GenericNumber can be expanded one level by replacing the leftmost GenericValue by specific values.
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