harmony 鸿蒙验证示例代码同源–异常场景4
验证示例代码同源–异常场景4
ID无嵌套,代码不一致
代码不一致(docs中只有结束的”`)
const promise: Promise<number> = new Promise((resolve: Function, reject: Function) => { setTimeout(() => { const randomNumber: number = Math.random(); if (randomNumber > 0.5) { resolve(randomNumber); } else { reject(new Error(‘Random number is too small’)); } }, 1000); })
<!--@[Start promise_async_operation](https://gitee.com/openharmony/applications_app_samples/blob/master/code/DocsSample/ArkTs/ArkTsConcurrent/MultithreadedConcurrency/MultiThreadConcurrencyOverview/entry/src/main/ets/pages/Index.ets)-->
代码不一致(docs中只有开始的```)
const promise: Promise<number> = new Promise((resolve: Function, reject: Function) => { setTimeout(() => { const randomNumber: number = Math.random(); if (randomNumber > 0.5) { resolve(randomNumber); } else { reject(new Error(‘Random number is too small’)); } }, 1000); })
嵌套的ID,docs中不含嵌套部分
import { BusinessError } from '@kit.BasicServicesKit';
promise.then((result: number) => {
console.info(`Random number is ${result}`);
}).catch((error: BusinessError) => {
console.error(error.message);
});
注释不一致(docs:行上 vs Sample:行),代码内容一致
async function myAsyncFunction(): Promise<string> {
const result: string = await new Promise((resolve: Function) => {
setTimeout(() => {
resolve('Hello, world!');
}, 3000);
});
// 输出: Hello, world!
console.info(result);
return result;
}
@Entry
@Component
struct PromiseAsyncAwait {
@State message: string = 'Hello World';
build() {
Row() {
Column() {
Text(this.message)
.fontSize(50)
.fontWeight(FontWeight.Bold)
.onClick(async () => {
let res = await myAsyncFunction();
console.info('res is: ' + res);
})
}
.width('100%')
}
.height('100%')
}
}
sample代码,start和end未同时出现
const promise: Promise<number> = new Promise((resolve: Function, reject: Function) => {
setTimeout(() => {
const randomNumber: number = Math.random();
if (randomNumber > 0.5) {
resolve(randomNumber);
} else {
reject(new Error('Random number is too small'));
}
}, 1000);
})
async function myAsyncFunction(): Promise<string> {
const result: string = await new Promise((resolve: Function) => {
});
console.info(result); // 输出: Hello, world!
return result;
}
@Entry
@Component
struct PromiseAsyncAwait {
@State message: string = 'Hello World';
build() {
Row() {
Column() {
Text(this.message)
.onClick(async () => {
let res = await myAsyncFunction();
console.info('res is: ' + res);
})
}
.width('100%')
}
.height('100%')
}
}
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