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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

35 lines (31 loc) 1.55 kB
'use strict'; var $ = require('../internals/export'); var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f; var toLength = require('../internals/to-length'); var notARegExp = require('../internals/not-a-regexp'); var requireObjectCoercible = require('../internals/require-object-coercible'); var correctIsRegExpLogic = require('../internals/correct-is-regexp-logic'); var IS_PURE = require('../internals/is-pure'); var nativeEndsWith = ''.endsWith; var min = Math.min; var CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('endsWith'); // https://github.com/zloirock/core-js/pull/702 var MDN_POLYFILL_BUG = !IS_PURE && !CORRECT_IS_REGEXP_LOGIC && !!function () { var descriptor = getOwnPropertyDescriptor(String.prototype, 'endsWith'); return descriptor && !descriptor.writable; }(); // `String.prototype.endsWith` method // https://tc39.github.io/ecma262/#sec-string.prototype.endswith $({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, { endsWith: function endsWith(searchString /* , endPosition = @length */) { var that = String(requireObjectCoercible(this)); notARegExp(searchString); var endPosition = arguments.length > 1 ? arguments[1] : undefined; var len = toLength(that.length); var end = endPosition === undefined ? len : min(toLength(endPosition), len); var search = String(searchString); return nativeEndsWith ? nativeEndsWith.call(that, search, end) : that.slice(end - search.length, end) === search; } });