'use strict'; /* eslint-disable es/no-array-prototype-lastindexof -- safe */ var apply = require('../internals/function-apply'); var toIndexedObject = require('../internals/to-indexed-object'); var toIntegerOrInfinity = require('../internals/to-integer-or-infinity'); var lengthOfArrayLike = require('../internals/length-of-array-like'); var arrayMethodIsStrict = require('../internals/array-method-is-strict'); var min = Math.min; var $lastIndexOf = [].lastIndexOf; var NEGATIVE_ZERO = !!$lastIndexOf && 1 / [1].lastIndexOf(1, -0) < 0; var STRICT_METHOD = arrayMethodIsStrict('lastIndexOf'); var FORCED = NEGATIVE_ZERO || !STRICT_METHOD; // `Array.prototype.lastIndexOf` method implementation // https://tc39.es/ecma262/#sec-array.prototype.lastindexof module.exports = FORCED ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) { // convert -0 to +0 if (NEGATIVE_ZERO) return apply($lastIndexOf, this, arguments) || 0; var O = toIndexedObject(this); var length = lengthOfArrayLike(O); if (length === 0) return -1; var index = length - 1; if (arguments.length > 1) index = min(index, toIntegerOrInfinity(arguments[1])); if (index < 0) index = length + index; for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0; return -1; } : $lastIndexOf;