closure1b.js (1514B)
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 abs = require( './../../../../../base/special/fast/abs' ); 24 25 26 // MAIN // 27 28 /** 29 * Returns a function to compute the hypotenuse using the alpha max plus beta min algorithm. 30 * 31 * @private 32 * @param {number} alpha - alpha 33 * @param {number} beta - beta 34 * @returns {Function} function to compute the hypotenuse 35 * 36 * @example 37 * var fcn = wrap( 1.0, 0.5 ); 38 * // returns <Function> 39 */ 40 function wrap( alpha, beta ) { 41 return hypot; 42 43 /** 44 * Computes the hypotenuse using the alpha max plus beta min algorithm. 45 * 46 * @private 47 * @param {number} x - number 48 * @param {number} y - number 49 * @returns {number} hypotenuse 50 * 51 * @example 52 * var h = hypot( 5.0, 12.0 ); 53 * // returns <number> 54 */ 55 function hypot( x, y ) { 56 x = abs( x ); 57 y = abs( y ); 58 if ( x > y ) { 59 return (alpha*x) + (beta*y); 60 } 61 return (beta*x) + (alpha*y); 62 } 63 } 64 65 66 // EXPORTS // 67 68 module.exports = wrap;