77 lines
1.6 KiB
JavaScript
77 lines
1.6 KiB
JavaScript
/**
|
|
* @license Apache-2.0
|
|
*
|
|
* Copyright (c) 2018 The Stdlib Authors.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Tests if two arguments are strictly equal.
|
|
*
|
|
* ## Notes
|
|
*
|
|
* - In contrast to the strict equality operator `===`, `-0` and `+0` are distinguishable.
|
|
*
|
|
*
|
|
* @param {*} a - first input value
|
|
* @param {*} b - second input value
|
|
* @returns {boolean} boolean indicating whether two arguments are strictly equal
|
|
*
|
|
* @example
|
|
* var bool = isStrictEqual( true, true );
|
|
* // returns true
|
|
*
|
|
* @example
|
|
* var bool = isStrictEqual( 3.14, 3.14 );
|
|
* // returns true
|
|
*
|
|
* @example
|
|
* var bool = isStrictEqual( {}, {} );
|
|
* // returns false
|
|
*
|
|
* @example
|
|
* var bool = isStrictEqual( -0.0, -0.0 );
|
|
* // returns true
|
|
*
|
|
* @example
|
|
* var bool = isStrictEqual( -0.0, 0.0 );
|
|
* // returns false
|
|
*
|
|
* @example
|
|
* var bool = isStrictEqual( NaN, NaN );
|
|
* // returns false
|
|
*
|
|
* @example
|
|
* var bool = isStrictEqual( [], [] );
|
|
* // returns false
|
|
*/
|
|
function isStrictEqual( a, b ) {
|
|
if ( a === b ) {
|
|
if ( a === 0.0 ) {
|
|
return 1.0 / a === 1.0 / b; // handles +-0
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = isStrictEqual;
|