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* @license Apache-2.0
*
* Copyright (c) 2019 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 //
/**
* Updates the cache of saved regular expression substring matches.
*
* ## Notes
*
* - In certain JavaScript engines (e.g., V8, SpiderMonkey), the global `RegExp` object has ([non-standard][1]) static, read-only properties (`$1`, `$2`, ..., `$9`) with cached substring matches.
*
* [1]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/n
*
* @private
* @param {StringArray} cache - list of previously saved substring matches
* @returns {StringArray} cache
*/
function updateRegExpCache( cache ) {
var i;
for ( i = 1; i < cache.length; i++ ) {
cache[ i ] = RegExp[ '$'+i ];
}
return cache;
}
// EXPORTS //
module.exports = updateRegExpCache;
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