main.js (1391B)
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( '@stdlib/math/base/special/abs' ); 24 25 26 // MAIN // 27 28 /** 29 * Returns a boolean indicating if an array is row-major based on a provided stride array. 30 * 31 * @param {IntegerArray} strides - stride array 32 * @returns {boolean} boolean indicating if an array is row-major 33 * 34 * @example 35 * var bool = isRowMajor( [ 2, 1 ] ); 36 * // returns true 37 * 38 * bool = isRowMajor( [ 1, 2 ] ); 39 * // returns false 40 */ 41 function isRowMajor( strides ) { 42 var ndims; 43 var s1; 44 var s2; 45 var i; 46 47 ndims = strides.length; 48 if ( ndims === 0 ) { 49 return false; 50 } 51 s1 = abs( strides[ 0 ] ); 52 for ( i = 1; i < ndims; i++ ) { 53 s2 = abs( strides[ i ] ); 54 if ( s2 > s1 ) { 55 return false; 56 } 57 s1 = s2; 58 } 59 return true; 60 } 61 62 63 // EXPORTS // 64 65 module.exports = isRowMajor;