All files / minn/lib main.js

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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' );
var NINF = require( '@stdlib/constants/float64/ninf' );
var PINF = require( '@stdlib/constants/float64/pinf' );
 
 
// MAIN //
 
/**
* Returns the minimum value.
*
* @param {number} [x] - first number
* @param {number} [y] - second number
* @param {...number} [args] - numbers
* @returns {number} minimum value
*
* @example
* var v = minn( 3.14, 4.2 );
* // returns 3.14
*
* @example
* var v = minn( 5.9, 3.14, 4.2 );
* // returns 3.14
*
* @example
* var v = minn( 3.14, NaN );
* // returns NaN
*
* @example
* var v = minn( +0.0, -0.0 );
* // returns -0.0
*/
function minn( 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 === NINF || y === NINF ) {
			return NINF;
		}
		if ( x === y && x === 0.0 ) {
			if ( isNegativeZero( x ) ) {
				return x;
			}
			return y;
		}
		if ( x < y ) {
			return x;
		}
		return y;
	}
	m = PINF;
	for ( i = 0; i < len; i++ ) {
		v = arguments[ i ];
		if ( isnan( v ) || v === NINF ) {
			return v;
		}
		if ( v < m ) {
			m = v;
		} else if (
			v === m &&
			v === 0.0 &&
			isNegativeZero( v )
		) {
			m = v;
		}
	}
	return m;
}
 
 
// EXPORTS //
 
module.exports = minn;