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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

53 lines (46 loc) 1.5 kB
'use strict'; var inspect = require('object-inspect'); var GetIntrinsic = require('../GetIntrinsic'); var $TypeError = GetIntrinsic('%TypeError%'); var Call = require('./Call'); var Get = require('./Get'); var GetIterator = require('./GetIterator'); var IsCallable = require('./IsCallable'); var IteratorClose = require('./IteratorClose'); var IteratorStep = require('./IteratorStep'); var IteratorValue = require('./IteratorValue'); var Type = require('./Type'); // https://tc39.es/ecma262/#sec-add-entries-from-iterable module.exports = function AddEntriesFromIterable(target, iterable, adder) { if (!IsCallable(adder)) { throw new $TypeError('Assertion failed: `adder` is not callable'); } if (iterable == null) { throw new $TypeError('Assertion failed: `iterable` is present, and not nullish'); } var iteratorRecord = GetIterator(iterable); while (true) { // eslint-disable-line no-constant-condition var next = IteratorStep(iteratorRecord); if (!next) { return target; } var nextItem = IteratorValue(next); if (Type(nextItem) !== 'Object') { var error = new $TypeError('iterator next must return an Object, got ' + inspect(nextItem)); return IteratorClose( iteratorRecord, function () { throw error; } // eslint-disable-line no-loop-func ); } try { var k = Get(nextItem, '0'); var v = Get(nextItem, '1'); Call(adder, target, [k, v]); } catch (e) { return IteratorClose( iteratorRecord, function () { throw e; } ); } } };