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-// Copyright 2012 The Closure Library Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS-IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-/**
- * @fileoverview A labs location for functions destined for Closure's
- * {@code goog.object} namespace.
- */
-
-goog.provide('goog.labs.object');
-
-
-/**
- * Whether two values are not observably distinguishable. This
- * correctly detects that 0 is not the same as -0 and two NaNs are
- * practically equivalent.
- *
- * The implementation is as suggested by harmony:egal proposal.
- *
- * @param {*} v The first value to compare.
- * @param {*} v2 The second value to compare.
- * @return {boolean} Whether two values are not observably distinguishable.
- * @see http://wiki.ecmascript.org/doku.php?id=harmony:egal
- */
-goog.labs.object.is = function(v, v2) {
- if (v === v2) {
- // 0 === -0, but they are not identical.
- // We need the cast because the compiler requires that v2 is a
- // number (although 1/v2 works with non-number). We cast to ? to
- // stop the compiler from type-checking this statement.
- return v !== 0 || 1 / v === 1 / /** @type {?} */ (v2);
- }
-
- // NaN is non-reflexive: NaN !== NaN, although they are identical.
- return v !== v && v2 !== v2;
-};