luhn-generator/update/node_modules/ret/lib/positions.js

A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

var types = require('./types');

exports.wordBoundary = function() {
  return { type: types.POSITION, value: 'b' };
};

exports.nonWordBoundary = function() {
  return { type: types.POSITION, value: 'B' };
};

exports.begin = function() {
  return { type: types.POSITION, value: '^' };
};

exports.end = function() {
  return { type: types.POSITION, value: '$' };
};