rogerrohrbach

class VersionVector
  # D. S. Parker, et al. Detection of Mutual Inconsistency in
  # Distributed Systems. IEEE Trans. Softw. Eng. 9, 3 (May 1983), 240-247.

  def initialize
    @versions = {}
    @versions.default = 0
  end

  def [](site)

rogerrohrbach

# == Active Model North American Telephone Number Validator
# http://en.wikipedia.org/wiki/North_American_Numbering_Plan#Current_system
# [Author] Roger Rohrbach ([email protected])
class NanpValidator < ActiveModel::EachValidator  

  def self.matcher(require_area_code) # :nodoc:
    %r{
      (?<country_code>  \+1                         ){0}
      (?<trunk_prefix>  1                           ){0}
      (?<delimiter>     ([-\.]|\ +)                 ){0}

rogerrohrbach

require 'singleton'

module U2
  class Edge
    include Singleton

    attr_accessor :delay

    def set_delay_for_tempo(bpm)
      # http://5cense.com/Edge_Delay.htm

rogerrohrbach

module Geo
  def self.distance(point_a = {}, point_b = {})
    # http://en.wikipedia.org/wiki/Haversine_formula

    r = 6371.009  # IUGG mean radius of the Earth

    deg2rad = lambda { |d| d * Math::PI / 180 }
    sin2 = lambda { |x| Math.sin(x) ** 2 }

    lat1 = deg2rad.call(point_a['lat'])