2 var toIndexedObject = require('../internals/to-indexed-object');
3 var toInteger = require('../internals/to-integer');
4 var toLength = require('../internals/to-length');
5 var arrayMethodIsStrict = require('../internals/array-method-is-strict');
8 var nativeLastIndexOf = [].lastIndexOf;
9 var NEGATIVE_ZERO = !!nativeLastIndexOf && 1 / [1].lastIndexOf(1, -0) < 0;
10 var STRICT_METHOD = arrayMethodIsStrict('lastIndexOf');
11 var FORCED = NEGATIVE_ZERO || !STRICT_METHOD;
13 // `Array.prototype.lastIndexOf` method implementation
14 // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
15 module.exports = FORCED ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
17 if (NEGATIVE_ZERO) return nativeLastIndexOf.apply(this, arguments) || 0;
18 var O = toIndexedObject(this);
19 var length = toLength(O.length);
20 var index = length - 1;
21 if (arguments.length > 1) index = min(index, toInteger(arguments[1]));
22 if (index < 0) index = length + index;
23 for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;
25 } : nativeLastIndexOf;