1/*
2 * Copyright (c) 2024 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
16let x!: number;
17initializeX();
18console.log(x + x);
19
20function initializeX() {
21  x = 10;
22}
23
24let y: number;
25initializeY();
26
27console.log(y! + y!); // it's not a definite assignment assertion, it's the 'Ensure Not-Null expression', see 7.16 ArkTS spec
28function initializeY() {
29  y = 20;
30}
31
32class ArticleMeta {
33  private wordsPerMinute!: number;
34  private secondsPerImage: number;
35
36  constructor(wordsPerMinute: number) {
37      this.secondsPerImage = 15;
38  }
39}
40
41class Person {
42  name: string = ""
43  age: number = 0
44  location: string = ""
45}
46
47type OptionalPerson = Person | undefined
48let persons : Record<string, OptionalPerson> = {
49  "Bob": {
50      name: "Bob",
51      age: 48,
52      location: "New York"
53  }
54}
55console.log(persons["Bob"]!.age)
56