is_missing.js (1197B)
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 // FUNCTIONS // 22 23 var contains = require( '@stdlib/assert/contains' ); 24 25 26 // MAIN // 27 28 /** 29 * Computes for each array element whether it is a missing value. 30 * 31 * @private 32 * @param {Array} arr - input array 33 * @param {Array} encoding - array whose elements encode missing values 34 * @returns {BooleanArray} output array 35 */ 36 function isMissing( arr, encoding ) { 37 var len; 38 var out; 39 var i; 40 41 len = arr.length; 42 out = new Array( len ); 43 for ( i = 0; i < len; i++ ) { 44 out[ i ] = contains( encoding, arr[ i ] ); 45 } 46 return out; 47 } 48 49 50 // EXPORTS // 51 52 module.exports = isMissing;