time-to-botec

Benchmark sampling in different programming languages
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minmaxabs.js (2457B)

      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 isnan = require( './../../../../base/assert/is-nan' );
     24 var abs = require( './../../../../base/special/abs' );
     25 var PINF = require( '@stdlib/constants/float64/pinf' );
     26 
     27 
     28 // MAIN //
     29 
     30 /**
     31 * Returns the minimum and maximum absolute values.
     32 *
     33 * @private
     34 * @param {(Array|TypedArray|Object)} out - output object
     35 * @param {number} x - first number
     36 * @param {number} [y] - second number
     37 * @param {...number} [args] - numbers
     38 * @returns {(Array|TypedArray|Object)} minimum and maximum absolute values
     39 *
     40 * @example
     41 * var out = [ 0.0, 0.0 ];
     42 * var v = minmaxabs( out, 3.14, 4.2 );
     43 * // returns [ 3.14, 4.2 ]
     44 *
     45 * var bool = ( v === out );
     46 * // returns true
     47 *
     48 * @example
     49 * var out = [ 0.0, 0.0 ];
     50 * var v = minmaxabs( out, -5.9, 3.14, 4.2 );
     51 * // returns [ 3.14, 5.9 ]
     52 *
     53 * @example
     54 * var out = [ 0.0, 0.0 ];
     55 * var v = minmaxabs( out, 3.14, NaN );
     56 * // returns [ NaN, NaN ]
     57 *
     58 * @example
     59 * var out = [ 0.0, 0.0 ];
     60 * var v = minmaxabs( out, +0.0, -0.0 );
     61 * // returns [ 0.0, 0.0 ]
     62 */
     63 function minmaxabs( out, x, y ) {
     64 	var len;
     65 	var min;
     66 	var max;
     67 	var ax;
     68 	var ay;
     69 	var av;
     70 	var v;
     71 	var i;
     72 
     73 	len = arguments.length;
     74 	if ( len === 2 ) {
     75 		ax = abs( x );
     76 		out[ 0 ] = ax;
     77 		out[ 1 ] = ax;
     78 		return out;
     79 	}
     80 	if ( len === 3 ) {
     81 		if ( isnan( x ) || isnan( y ) ) {
     82 			out[ 0 ] = NaN;
     83 			out[ 1 ] = NaN;
     84 			return out;
     85 		}
     86 		ax = abs( x );
     87 		ay = abs( y );
     88 		if ( ax < ay ) {
     89 			out[ 0 ] = ax;
     90 			out[ 1 ] = ay;
     91 			return out;
     92 		}
     93 		out[ 0 ] = ay;
     94 		out[ 1 ] = ax;
     95 		return out;
     96 	}
     97 	min = PINF;
     98 	max = 0.0;
     99 	for ( i = 0; i < len; i++ ) {
    100 		v = arguments[ i ];
    101 		if ( isnan( v ) ) {
    102 			out[ 0 ] = NaN;
    103 			out[ 1 ] = NaN;
    104 			return out;
    105 		}
    106 		av = abs( v );
    107 		if ( av < min ) {
    108 			min = av;
    109 		}
    110 		if ( av > max ) {
    111 			max = av;
    112 		}
    113 	}
    114 	out[ 0 ] = min;
    115 	out[ 1 ] = max;
    116 	return out;
    117 }
    118 
    119 
    120 // EXPORTS //
    121 
    122 module.exports = minmaxabs;