Strict mode Passingnon-Strict mode Passing
Features:
- ∅
// Copyright (c) 2012 Ecma International. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-array.prototype.lastindexof description: Array.prototype.lastIndexOf must return correct index(undefined) ---*/ var obj = { toString: function() { return undefined; } }; var _undefined1 = undefined; var _undefined2; var a = new Array(_undefined1, _undefined2, undefined, true, 0, false, null, 1, "undefined", obj, 1); assert.sameValue(a.lastIndexOf(undefined), 2, 'a.lastIndexOf(undefined)');