49 lines
1.1 KiB
JavaScript
49 lines
1.1 KiB
JavaScript
|
/**
|
||
|
|
* @license Apache-2.0
|
||
|
|
*
|
||
|
|
* Copyright (c) 2018 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 //
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds elements from a collection to the beginning of an array.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Array} arr - input array
|
||
|
|
* @param {ArrayLike} items - items to add
|
||
|
|
* @returns {Array} input array
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* var arr = [ 1.0, 2.0, 3.0, 4.0, 5.0 ];
|
||
|
|
*
|
||
|
|
* arr = prepend( arr, [ 6.0, 7.0 ] );
|
||
|
|
* // returns [ 6.0, 7.0, 1.0, 2.0, 3.0, 4.0, 5.0 ]
|
||
|
|
*/
|
||
|
|
function prepend( arr, items ) {
|
||
|
|
var i;
|
||
|
|
for ( i = items.length-1; i >= 0; i-- ) {
|
||
|
|
arr.unshift( items[ i ] );
|
||
|
|
}
|
||
|
|
return arr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// EXPORTS //
|
||
|
|
|
||
|
|
module.exports = prepend;
|