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
19 lines (15 loc) • 300 B
JavaScript
;
var mod = require('../helpers/mod');
// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.3
module.exports = function DaysInYear(y) {
if (mod(y, 4) !== 0) {
return 365;
}
if (mod(y, 100) !== 0) {
return 366;
}
if (mod(y, 400) !== 0) {
return 365;
}
return 366;
};