ndarray.js (1954B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2021 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 mapBy = require( '@stdlib/strided/base/map-by' ).ndarray; 24 var abs = require( './../../../../base/special/abs' ); 25 26 27 // MAIN // 28 29 /** 30 * Computes the absolute value of each element retrieved from a strided input array `x` via a callback function and assigns each result to an element in a strided output array `y`. 31 * 32 * @param {NonNegativeInteger} N - number of indexed elements 33 * @param {Collection} x - input array/collection 34 * @param {integer} strideX - `x` stride length 35 * @param {NonNegativeInteger} offsetX - starting `x` index 36 * @param {Collection} y - destination array/collection 37 * @param {integer} strideY - `y` stride length 38 * @param {NonNegativeInteger} offsetY - starting `y` index 39 * @param {Callback} clbk - callback 40 * @param {*} [thisArg] - callback execution context 41 * @returns {Collection} `y` 42 * 43 * @example 44 * function accessor( v ) { 45 * return v * 2.0; 46 * } 47 * 48 * var x = [ 1.0, -2.0, 3.0, -4.0, 5.0 ]; 49 * var y = [ 0.0, 0.0, 0.0, 0.0, 0.0 ]; 50 * 51 * absBy( x.length, x, 1, 0, y, 1, 0, accessor ); 52 * 53 * console.log( y ); 54 * // => [ 2.0, 4.0, 6.0, 8.0, 10.0 ] 55 */ 56 function absBy( N, x, strideX, offsetX, y, strideY, offsetY, clbk, thisArg ) { 57 return mapBy( N, x, strideX, offsetX, y, strideY, offsetY, abs, clbk, thisArg ); // eslint-disable-line max-len 58 } 59 60 61 // EXPORTS // 62 63 module.exports = absBy;