copy_array.js (1179B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MAIN // 22 23 /** 24 * Copies the contents of array-like value to a new array. 25 * 26 * @private 27 * @param {ArrayLike} arr - input array 28 * @param {NonNegativeInteger} len - array length 29 * @returns {Array} output array 30 * 31 * @example 32 * var arr = [ 1.0, 2.0, 3.0 ]; 33 * 34 * var out = copy( arr, arr.length ); 35 * // returns [ 1.0, 2.0, 3.0 ] 36 * 37 * var bool = ( arr === out ); 38 * // returns false 39 */ 40 function copy( arr, len ) { 41 var out; 42 var i; 43 44 out = []; 45 for ( i = 0; i < len; i++ ) { 46 out.push( arr[ i ] ); 47 } 48 return out; 49 } 50 51 52 // EXPORTS // 53 54 module.exports = copy;