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* @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';
// MODULES //
var isArrayLikeObject = require( '@stdlib/assert/is-array-like-object' );
var format = require( '@stdlib/string/format' );
var copy = require( '@stdlib/utils/copy' );
// MAIN //
/**
* Returns a function to flatten an array and deep copy.
*
* @private
* @param {Function} flatten - flatten function
* @returns {Function} wrapped flatten function
*/
function wrap( flatten ) {
return flattenArray;
/**
* Flattens an array and deep copies array elements.
*
* @private
* @param {ArrayLikeObject} arr - array to flatten
* @throws {TypeError} must provide an array-like object
* @returns {Array} flattened array
*/
function flattenArray( arr ) {
if ( !isArrayLikeObject( arr ) ) {
throw new TypeError( format( 'invalid argument. Must provide an array-like object. Value: `%s`.', arr ) );
}
return copy( flatten( arr ) );
}
}
// EXPORTS //
module.exports = wrap;
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