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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 resolveGetter = require( '@stdlib/array/base/resolve-getter' );
var copy = require( '@stdlib/array/base/copy' );
// MAIN //
/**
* Converts each nested array to an object.
*
* ## Notes
*
* - The function assumes that all nested arrays have the same length.
* - The number of provided array labels should equal the length of each nested array.
*
* @param {Collection<Collection>} arr - input array
* @param {ArrayLikeObject<string>} fields - list of field names
* @returns {Array<Object>} output array
*
* @example
* var x = [ [ 1, 2 ], [ 3, 4 ] ];
* var fields = [ 'x', 'y' ];
*
* var out = nested2objects( x, fields );
* // returns [ { 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 } ]
*/
function nested2objects( arr, fields ) {
var names;
var oget;
var get;
var out;
var obj;
var tmp;
var M;
var N;
var i;
var j;
M = arr.length;
if ( M < 1 ) {
return [];
}
// Resolve the accessor for the outer array:
oget = resolveGetter( arr );
N = oget( arr, 0 ).length;
if ( N < 1 ) {
return [];
}
// Copy the list of fields to an indexed array to avoid repeated accessor calls:
names = copy( fields );
out = [];
for ( i = 0; i < M; i++ ) {
tmp = oget( arr, i );
get = resolveGetter( tmp );
obj = {};
for ( j = 0; j < N; j++ ) {
obj[ names[ j ] ] = get( tmp, j );
}
out.push( obj );
}
return out;
}
// EXPORTS //
module.exports = nested2objects;
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