UNPKG

luhn-generator

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

35 lines (31 loc) 1.12 kB
'use strict'; var addToUnscopables = require('./_add-to-unscopables'); var step = require('./_iter-step'); var Iterators = require('./_iterators'); var toIObject = require('./_to-iobject'); // 22.1.3.4 Array.prototype.entries() // 22.1.3.13 Array.prototype.keys() // 22.1.3.29 Array.prototype.values() // 22.1.3.30 Array.prototype[@@iterator]() module.exports = require('./_iter-define')(Array, 'Array', function (iterated, kind) { this._t = toIObject(iterated); // target this._i = 0; // next index this._k = kind; // kind // 22.1.5.2.1 %ArrayIteratorPrototype%.next() }, function () { var O = this._t; var kind = this._k; var index = this._i++; if (!O || index >= O.length) { this._t = undefined; return step(1); } if (kind == 'keys') return step(0, index); if (kind == 'values') return step(0, O[index]); return step(0, [index, O[index]]); }, 'values'); // argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7) Iterators.Arguments = Iterators.Array; addToUnscopables('keys'); addToUnscopables('values'); addToUnscopables('entries');