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* @license Apache-2.0
*
* Copyright (c) 2025 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';
// MODULES //
var broadcastArrayExceptDimensions = require( '@stdlib/ndarray/base/broadcast-array-except-dimensions' ); // eslint-disable-line id-length
var getShape = require( '@stdlib/ndarray/base/shape' );
// MAIN //
/**
* Broadcasts a list of input ndarrays to a common shape.
*
* ## Notes
*
* - The function mutates the input array.
*
* @private
* @param {Array<ndarray>} arrays - list of input ndarrays
* @param {NegativeInteger} dim - dimension along which to concatenate input ndarrays
* @returns {Array<ndarray>} list of broadcasted ndarrays
*/
function broadcastArrays( arrays, dim ) {
var dims;
var tmp;
var sh;
var i;
var j;
// Find the shape of the ndarray with the most dimensions...
sh = getShape( arrays[ 0 ], false );
j = 0;
for ( i = 1; i < arrays.length; i++ ) {
tmp = getShape( arrays[ i ], false );
if ( tmp.length > sh.length ) {
sh = tmp;
j = i;
}
}
// Broadcast ndarrays to the shape with the most dimensions...
dims = [ dim ];
for ( i = 0; i < arrays.length; i++ ) {
if ( i === j ) {
continue;
}
arrays[ i ] = broadcastArrayExceptDimensions( arrays[ i ], sh, dims );
}
return arrays;
}
// EXPORTS //
module.exports = broadcastArrays;
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