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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 //
/**
* Zips one or more arrays to an array of objects.
*
* ## Notes
*
* - The function assumes that the list of arrays to be zipped all have the same length.
* - The number of provided array labels should equal the number of arrays to be zipped.
*
* @param {Collection<Collection>} arrays - list of arrays to be zipped
* @param {ArrayLikeObject<string>} labels - list of array labels
* @returns {Array<Object>} output array
*
* @example
* var x = [ 1, 2, 3 ];
* var y = [ 'a', 'b', 'c' ];
*
* var labels = [ 'x', 'y' ];
*
* var z = zip2objects( [ x, y ], labels );
* // returns [ { 'x': 1, 'y': 'a' }, { 'x': 2, 'y': 'b' }, { 'x': 3, 'y': 'c' } ]
*/
function zip2objects( arrays, labels ) {
var getters;
var list;
var keys;
var get;
var out;
var obj;
var M;
var N;
var i;
var j;
M = arrays.length;
if ( M < 1 ) {
return [];
}
list = copy( arrays );
N = list[ 0 ].length;
if ( N < 1 ) {
return [];
}
getters = [];
get = resolveGetter( labels );
keys = [];
for ( j = 0; j < M; j++ ) {
getters.push( resolveGetter( list[ j ] ) );
keys.push( get( labels, j ) );
}
out = [];
for ( i = 0; i < N; i++ ) {
obj = {};
for ( j = 0; j < M; j++ ) {
obj[ keys[ j ] ] = getters[ j ]( list[ j ], i );
}
out.push( obj );
}
return out;
}
// EXPORTS //
module.exports = zip2objects;
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