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* @license Apache-2.0
*
* Copyright (c) 2024 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MAIN //
/**
* Resolves a stride length for broadcasting a one-dimensional array.
*
* @private
* @param {NonNegativeInteger} M - input array length
* @param {NonNegativeInteger} N - output array length
* @throws {Error} input arrays must be broadcast compatible
* @returns {NonNegativeInteger} stride length
*/
function resolveStride( M, N ) {
// Note that this effectively in-lines logic from `@stdlib/array/base/broadcast-array` in order to avoid unnecessary object creation...
if ( M === 1 ) {
return 0;
}
if ( M === N ) {
return 1;
}
throw new Error( 'invalid arguments. Input arguments are not broadcast compatible.' );
}
// EXPORTS //
module.exports = resolveStride;
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