KOKINIO - MANAGER

Edit File: isLuhnNumber.js

import assertString from './util/assertString'; export default function isLuhnNumber(str) { assertString(str); var sanitized = str.replace(/[- ]+/g, ''); var sum = 0; var digit; var tmpNum; var shouldDouble; for (var i = sanitized.length - 1; i >= 0; i--) { digit = sanitized.substring(i, i + 1); tmpNum = parseInt(digit, 10); if (shouldDouble) { tmpNum *= 2; if (tmpNum >= 10) { sum += tmpNum % 10 + 1; } else { sum += tmpNum; } } else { sum += tmpNum; } shouldDouble = !shouldDouble; } return !!(sum % 10 === 0 ? sanitized : false); }