1/* 2 * Copyright (c) 2023-2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16export default { 17 18 /** 19 * Check obj is empty. 20 * 21 * @param {any} obj 22 * @return {boolean} true(empty) 23 */ 24 isEmpty<T>(obj: T): boolean { 25 return (typeof obj === 'undefined' || obj === undefined || obj === null || obj === undefined); 26 }, 27 28 29 /** 30 * Check str is empty. 31 * 32 * @param {string} str 33 * @return {boolean} true(empty) 34 */ 35 checkStrIsEmpty(str: string): boolean { 36 return str === undefined || str === null || str.trim().length === 0; 37 }, 38 39 /** 40 * Check array is empty. 41 * 42 * @param {Array} arr An array to check if is empty. 43 * @return {boolean} true(empty) 44 */ 45 isEmptyArr<T>(arr: T[]): boolean { 46 return arr === undefined || arr === null || arr.length === 0; 47 } 48}; 49