Press n or j to go to the next uncovered block, b, p or k for the previous block.
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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 isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var NINF = require( '@stdlib/constants/float64/ninf' );
var PINF = require( '@stdlib/constants/float64/pinf' );
// MAIN //
/**
* Returns the maximum value.
*
* @param {number} [x] - first number
* @param {number} [y] - second number
* @param {...number} [args] - numbers
* @returns {number} maximum value
*
* @example
* var v = maxn( 3.14, 4.2 );
* // returns 4.2
*
* @example
* var v = maxn( 5.9, 3.14, 4.2 );
* // returns 5.9
*
* @example
* var v = maxn( 3.14, NaN );
* // returns NaN
*
* @example
* var v = maxn( +0.0, -0.0 );
* // returns +0.0
*/
function maxn( x, y ) {
var len;
var m;
var v;
var i;
len = arguments.length;
if ( len === 2 ) {
if ( isnan( x ) || isnan( y ) ) {
return NaN;
}
if ( x === PINF || y === PINF ) {
return PINF;
}
if ( x === y && x === 0.0 ) {
if ( isPositiveZero( x ) ) {
return x;
}
return y;
}
if ( x > y ) {
return x;
}
return y;
}
m = NINF;
for ( i = 0; i < len; i++ ) {
v = arguments[ i ];
if ( isnan( v ) || v === PINF ) {
return v;
}
if ( v > m ) {
m = v;
} else if (
v === m &&
v === 0.0 &&
isPositiveZero( v )
) {
m = v;
}
}
return m;
}
// EXPORTS //
module.exports = maxn;
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