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luhn-generator

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

59 lines (53 loc) 1.41 kB
var Symbol = require('./_Symbol'), copyArray = require('./_copyArray'), getTag = require('./_getTag'), isArrayLike = require('./isArrayLike'), isString = require('./isString'), iteratorToArray = require('./_iteratorToArray'), mapToArray = require('./_mapToArray'), setToArray = require('./_setToArray'), stringToArray = require('./_stringToArray'), values = require('./values'); /** `Object#toString` result references. */ var mapTag = '[object Map]', setTag = '[object Set]'; /** Built-in value references. */ var symIterator = Symbol ? Symbol.iterator : undefined; /** * Converts `value` to an array. * * @static * @since 0.1.0 * @memberOf _ * @category Lang * @param {*} value The value to convert. * @returns {Array} Returns the converted array. * @example * * _.toArray({ 'a': 1, 'b': 2 }); * // => [1, 2] * * _.toArray('abc'); * // => ['a', 'b', 'c'] * * _.toArray(1); * // => [] * * _.toArray(null); * // => [] */ function toArray(value) { if (!value) { return []; } if (isArrayLike(value)) { return isString(value) ? stringToArray(value) : copyArray(value); } if (symIterator && value[symIterator]) { return iteratorToArray(value[symIterator]()); } var tag = getTag(value), func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values); return func(value); } module.exports = toArray;