55 lines
1.2 KiB
JavaScript
55 lines
1.2 KiB
JavaScript
/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var isArray = require( '@stdlib/assert/is-array' );
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// MAIN //
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/**
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* Recursively flattens an array.
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*
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* @private
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* @param {Array} out - output array
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* @param {Array} arr - input array
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* @param {NonNegativeInteger} depth - recursion depth
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* @returns {Array} output array
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*/
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function recurse( out, arr, depth ) {
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var v;
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var i;
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for ( i = 0; i < arr.length; i++ ) {
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v = arr[ i ];
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if ( depth && isArray( v ) ) {
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recurse( out, v, depth-1 );
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} else {
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out.push( v );
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}
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}
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return out;
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}
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// EXPORTS //
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module.exports = recurse;
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