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1# 验证示例代码同源--异常场景1
2
3
4## ID无嵌套，存在空行
5
6代码不一致（空行）
7```ts
8const promise: Promise<number> = new Promise((resolve: Function, reject: Function) => {
9  setTimeout(() => {
10    const randomNumber: number = Math.random();
11    if (randomNumber > 0.5) {
12      resolve(randomNumber);
13
14    } else {
15      reject(new Error('Random number is too small'));
16    }
17  }, 1000);
18})
19```
20<!--@[promise_async_operation](https://gitcode.com/openharmony/applications_app_samples/blob/master/code/DocsSample/ArkTs/ArkTsConcurrent/AsyncConcurrencyOverview/entry/src/main/ets/pages/Index.ets)-->
21
22## docs文档中的ID在Sample中不存在(不匹配)
23
24```ts
25const promise: Promise<number> = new Promise((resolve: Function, reject: Function) => {
26  setTimeout(() => {
27    const randomNumber: number = Math.random();
28    if (randomNumber > 0.5) {
29      resolve(randomNumber);
30    } else {
31      reject(new Error('Random number is too small'));
32    }
33  }, 1000);
34})
35```
36<!--@[code-null](https://gitcode.com/openharmony/applications_app_samples/blob/master/code/DocsSample/ArkTs/ArkTsConcurrent/MultithreadedConcurrency/MultiThreadConcurrencyOverview/entry/src/main/ets/pages/Index.ets)-->
37
38
39## 引用部分代码（Exclude字段）
40
41### 注释不一致（新增注释），代码内容一致
42
43```ts
44//新增注释
45// 开始--async_await_sync_operation
46async function myAsyncFunction(): Promise<string> {
47  const result: string = await new Promise((resolve: Function) => {
48    setTimeout(() => {
49      resolve('Hello, world!');
50    }, 3000);
51  });
52  console.info(result); // 输出： Hello, world!
53  return result;
54}
55
56@Entry
57@Component
58struct PromiseAsyncAwait {
59  @State message: string = 'Hello World';
60
61  build() {
62    Row() {
63      Column() {
64        Text(this.message)
65          .fontSize(50)
66          .fontWeight(FontWeight.Bold)
67          .onClick(async () => {
68            let res = await myAsyncFunction();
69            console.info('res is: ' + res);
70          })
71      }
72      .width('100%')
73    }
74    .height('100%')
75  }
76}
77// 结束--async_await_sync_operation
78```
79<!--@[async_await_sync_operation](https://gitcode.com/openharmony/applications_app_samples/blob/master/code/DocsSample/ArkTs/ArkTsConcurrent/AsyncConcurrencyOverview/entry/src/main/ets/pages/Index.ets)-->
80
81### docs代码中未去除Exclude字段
82
83```ts
84import { taskpool } from '@kit.ArkTS';
85
86// 跨线程并发任务
87@Concurrent
88async function produce(): Promise<number> {
89  // 添加生产相关逻辑
90  console.info('producing...');
91  return Math.random();
92}
93
94class Consumer {
95  public consume(value: Object) {
96    // 添加消费相关逻辑
97    console.info('consuming value: ' + value);
98  }
99}
100
101@Entry
102@Component
103struct Index {
104  @State message: string = 'Hello World';
105
106  build() {
107    Row() {
108      Column() {
109        Text(this.message)
110          .fontSize(50)
111          .fontWeight(FontWeight.Bold)
112        Button() {
113          Text('start')
114        }.onClick(() => {
115          let produceTask: taskpool.Task = new taskpool.Task(produce);
116          let consumer: Consumer = new Consumer();
117          for (let index: number = 0; index < 10; index++) {
118            // 执行生产异步并发任务
119            taskpool.execute(produceTask).then((res: Object) => {
120              consumer.consume(res);
121            }).catch((e: Error) => {
122              console.error(e.message);
123            })
124          }
125          this.message = 'success';
126        })
127        .id('button')
128        .width('20%')
129        .height('20%')
130      }
131      .width('100%')
132    }
133    .height('100%')
134  }
135}
136```
137<!--@[actor_model](https://gitcode.com/openharmony/applications_app_samples/blob/master/code/DocsSample/ArkTs/ArkTsConcurrent/MultithreadedConcurrency/MultiThreadConcurrencyOverview/entry/src/main/ets/pages/Index.ets)-->
138
139
140## 嵌套的ID，docs中不含嵌套部分(修改4的部分，是否因为空行导致的报错，此文档中，已经取消了空行)
141
142```ts
143import { BusinessError } from '@kit.BasicServicesKit';
144promise.then((result: number) => {
145  console.info(`Random number is ${result}`);
146}).catch((error: BusinessError) => {
147  console.error(error.message);
148});
149```
150<!--@[promise_then_catch_handling](https://gitcode.com/openharmony/applications_app_samples/blob/master/code/DocsSample/ArkTs/ArkTsConcurrent/AsyncConcurrencyOverview/entry/src/main/ets/pages/Index.ets)-->