1/* 2 * Copyright (c) 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 16type LambdaType = (prefix: string, ...args: string[]) => string; 17 18 19function main(): void { 20 21 let lam: LambdaType = (prefix: string, ...args: string[]): string => { 22 let ret = prefix; 23 for (let arg of args) { 24 ret += arg; 25 } 26 return ret; 27 } 28 29 let x: string = lam("Test 1:", " case 1,", " case 2,", " case 3."); 30 assert (x == "Test 1: case 1, case 2, case 3."); 31 32 let arr: string[] = [" case 4,", " case 5,", " case 6."]; 33 34 let y = lam("Test 2:", ...arr); 35 assert (y == "Test 2: case 4, case 5, case 6."); 36} 37