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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 //
/**
* Returns the index offset which specifies the location of the first indexed value in a strided array.
*
* @param {NonNegativeInteger} N - number of indexed elements
* @param {integer} stride - index increment
* @returns {NonNegativeInteger} offset - offset
*
* @example
* var offset = stride2offset( 10, -10 );
* // returns 90
*/
function stride2offset( N, stride ) {
if ( stride > 0 ) {
return 0;
}
return ( 1 - N ) * stride;
}
// EXPORTS //
module.exports = stride2offset;
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