1/* 2 * Copyright (c) 2025 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 16Class MyClass { 17 base: number; 18 constructor(base: number) { 19 this.base = base; 20 } 21 compare((value: number, index:number, arr: Array<number>)) { 22 return value < this.base 23 } 24} 25 26let arr: Array<number> = new Array<number>(1, 2, 3); 27let a = new MyClass(2); 28let b = new MyClass(3); 29arr.filter(a.compare, a); 30arr.filter(a.compare); 31arr.filter(a.compare, b); 32 33type T = number | T[]; 34let arr: ReadonlyArray<T> = [[1.0, 2.0], 3.0, [4.0, 5.0]]; 35arr.flatMap( 36 (value, index, array) => { 37 return value; 38 } 39);