luhn-generator
Version:
A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm
9 lines (8 loc) • 320 B
JavaScript
;
module.exports = (flag, argv) => {
argv = argv || process.argv;
const prefix = flag.startsWith('-') ? '' : (flag.length === 1 ? '-' : '--');
const pos = argv.indexOf(prefix + flag);
const terminatorPos = argv.indexOf('--');
return pos !== -1 && (terminatorPos === -1 ? true : pos < terminatorPos);
};