luhn-generator/update/node_modules/core-js-pure/es/instance/copy-within.js

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

var copyWithin = require('../array/virtual/copy-within');

var ArrayPrototype = Array.prototype;

module.exports = function (it) {
  var own = it.copyWithin;
  return it === ArrayPrototype || (it instanceof Array && own === ArrayPrototype.copyWithin) ? copyWithin : own;
};