agodin3z

export const getCardType = (num) => {
  let type = 'unknow';
  if (num.match('^3[47]\\d{0,13}')) {
    type = 'amex';
  } else if (num.match('^(?:6011|65\\d{0,2}|64[4-9]\\d?)\\d{0,12}')) {
    type = 'discover';
  } else if (num.match('^3(?:0([0-5]|9)|[689]\\d?)\\d{0,11}')) {
    type = 'diners';
  } else if (num.match('^(5[1-5]\\d{0,2}|22[2-9]\\d{0,1}|2[3-7]\\d{0,2})\\d{0,12}')) {
    type = 'mastercard';

agodin3z

export const validateCard = ((arr) => {
  return (num) => {
    let len = num.length;
    let bit = 1;
    let sum = 0;
    let val;
    while (len) {
      val = parseInt(num.charAt(--len), 10);
      // eslint-disable-next-line no-bitwise,no-cond-assign
      sum += (bit ^= 1) ? arr[val] : val;

agodin3z

var Luhn = {
  // length of our number (check digit included)
  length: 10,
  pow2: [0, 2, 4, 6, 8, 1, 3, 5, 7, 9],
  // compute check digit
  checksum: function (x) {
    var sum = 0;
    var n;
    var odd = false;
    for (var i = x.length - 1; i >= 0; --i) {

agodin3z

TypeORM Simple WHERE Clause Generator

Preview:

/**
 * Generates a simple WHERE clause for TypeORM based on query and fields.
 *
 * @template T - The entity type.
 * @param {string} query - The search query.
 * @param {string} fields - A comma-separated list of fields to search in.
 * @param {FindOptionsWhere<T>} [defaultWhere={}] - Default WHERE conditions.