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* @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';
// MODULES //
var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
// MAIN //
/**
* Returns the minimum and maximum values and assigns results to a provided output array.
*
* @private
* @param {number} x - first number
* @param {number} y - second number
* @param {Collection} out - output array
* @param {integer} stride - output array stride
* @param {NonNegativeInteger} offset - output array index offset
* @returns {Collection} minimum and maximum values
*
* @example
* var out = [ 0.0, 0.0 ];
* var v = minmax( 3.14, 4.2, out, 1, 0 );
* // returns [ 3.14, 4.2 ]
*
* var bool = ( v === out );
* // returns true
*
* @example
* var out = [ 0.0, 0.0 ];
* var v = minmax( 3.14, NaN, out, 1, 0 );
* // returns [ NaN, NaN ]
*
* @example
* var out = [ 0.0, 0.0 ];
* var v = minmax( +0.0, -0.0, out, 1, 0 );
* // returns [ -0.0, 0.0 ]
*/
function minmax( x, y, out, stride, offset ) {
if ( isnan( x ) || isnan( y ) ) {
out[ offset ] = NaN;
out[ offset + stride ] = NaN;
return out;
}
if ( x === y && x === 0.0 ) {
if ( isNegativeZero( x ) ) {
out[ offset ] = x;
out[ offset + stride ] = y;
return out;
}
out[ offset ] = y;
out[ offset + stride ] = x;
return out;
}
if ( x < y ) {
out[ offset ] = x;
out[ offset + stride ] = y;
return out;
}
out[ offset ] = y;
out[ offset + stride ] = x;
return out;
}
// EXPORTS //
module.exports = minmax;
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