time-to-botec

Benchmark sampling in different programming languages
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minmax.js (2820B)

      1 /**
      2 * @license Apache-2.0
      3 *
      4 * Copyright (c) 2018 The Stdlib Authors.
      5 *
      6 * Licensed under the Apache License, Version 2.0 (the "License");
      7 * you may not use this file except in compliance with the License.
      8 * You may obtain a copy of the License at
      9 *
     10 *    http://www.apache.org/licenses/LICENSE-2.0
     11 *
     12 * Unless required by applicable law or agreed to in writing, software
     13 * distributed under the License is distributed on an "AS IS" BASIS,
     14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15 * See the License for the specific language governing permissions and
     16 * limitations under the License.
     17 */
     18 
     19 'use strict';
     20 
     21 // MODULES //
     22 
     23 var isNegativeZero = require( './../../../../base/assert/is-negative-zero' );
     24 var isPositiveZero = require( './../../../../base/assert/is-positive-zero' );
     25 var isnan = require( './../../../../base/assert/is-nan' );
     26 var NINF = require( '@stdlib/constants/float64/ninf' );
     27 var PINF = require( '@stdlib/constants/float64/pinf' );
     28 
     29 
     30 // MAIN //
     31 
     32 /**
     33 * Returns the minimum and maximum values.
     34 *
     35 * @private
     36 * @param {(Array|TypedArray|Object)} out - output object
     37 * @param {number} x - first number
     38 * @param {number} [y] - second number
     39 * @param {...number} [args] - numbers
     40 * @returns {(Array|TypedArray|Object)} minimum and maximum values
     41 *
     42 * @example
     43 * var out = [ 0.0, 0.0 ];
     44 * var v = minmax( out, 3.14, 4.2 );
     45 * // returns [ 3.14, 4.2 ]
     46 *
     47 * var bool = ( v === out );
     48 * // returns true
     49 *
     50 * @example
     51 * var out = [ 0.0, 0.0 ];
     52 * var v = minmax( out, 5.9, 3.14, 4.2 );
     53 * // returns [ 3.14, 5.9 ]
     54 *
     55 * @example
     56 * var out = [ 0.0, 0.0 ];
     57 * var v = minmax( out, 3.14, NaN );
     58 * // returns [ NaN, NaN ]
     59 *
     60 * @example
     61 * var out = [ 0.0, 0.0 ];
     62 * var v = minmax( out, +0.0, -0.0 );
     63 * // returns [ -0.0, 0.0 ]
     64 */
     65 function minmax( out, x, y ) {
     66 	var len;
     67 	var min;
     68 	var max;
     69 	var v;
     70 	var i;
     71 
     72 	len = arguments.length;
     73 	if ( len === 2 ) {
     74 		out[ 0 ] = x;
     75 		out[ 1 ] = x;
     76 		return out;
     77 	}
     78 	if ( len === 3 ) {
     79 		if ( isnan( x ) || isnan( y ) ) {
     80 			out[ 0 ] = NaN;
     81 			out[ 1 ] = NaN;
     82 			return out;
     83 		}
     84 		if ( x === y && x === 0.0 ) {
     85 			if ( isNegativeZero( x ) ) {
     86 				out[ 0 ] = x;
     87 				out[ 1 ] = y;
     88 				return out;
     89 			}
     90 			out[ 0 ] = y;
     91 			out[ 1 ] = x;
     92 			return out;
     93 		}
     94 		if ( x < y ) {
     95 			out[ 0 ] = x;
     96 			out[ 1 ] = y;
     97 			return out;
     98 		}
     99 		out[ 0 ] = y;
    100 		out[ 1 ] = x;
    101 		return out;
    102 	}
    103 	min = PINF;
    104 	max = NINF;
    105 	for ( i = 0; i < len; i++ ) {
    106 		v = arguments[ i ];
    107 		if ( isnan( v ) ) {
    108 			out[ 0 ] = NaN;
    109 			out[ 1 ] = NaN;
    110 			return out;
    111 		}
    112 		if ( v < min ) {
    113 			min = v;
    114 		} else if (
    115 			v === 0.0 &&
    116 			v === min &&
    117 			isNegativeZero( v )
    118 		) {
    119 			min = v;
    120 		}
    121 		if ( v > max ) {
    122 			max = v;
    123 		} else if (
    124 			v === 0.0 &&
    125 			v === max &&
    126 			isPositiveZero( v )
    127 		) {
    128 			max = v;
    129 		}
    130 	}
    131 	out[ 0 ] = min;
    132 	out[ 1 ] = max;
    133 	return out;
    134 }
    135 
    136 
    137 // EXPORTS //
    138 
    139 module.exports = minmax;