Node.js 如何返回此数组的第一个元素？

数组blobstream如下所示：

blobstream = [1,2,3]

async function* main() {
//            ^−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− generator function
    for await (const blob of containerClient.listBlobsFlat()) {
        const blockBlobClient = containerClient.getBlockBlobClient(blob.name);

        const downloadBlockBlobResponse = await blockBlobClient.download(0);
        const download = await blobToString(await downloadBlockBlobResponse.blobBody);
        console.log(download);
        yield download;
//      ^^^^^−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− yield a result
    }
}

我只想通过每个循环返回一个数组 第一圈：1 第二圈：2 第三圈：3

最好的解决方案是什么？谢谢伊登

 async function main() {
        let i = 1;
    
        for await (const blob of containerClient.listBlobsFlat()) {
            const blockBlobClient = containerClient.getBlockBlobClient(blob.name);
    
            const downloadBlockBlobResponse = await blockBlobClient.download(0);
            const download = await blobToString(await downloadBlockBlobResponse.blobBody);
            console.log(download);
            blobstream.push(download);
        }
        return blobstream;
    }

---

听起来您正在寻找一个（比如

containerClient.listBlobsFlat（）

，它似乎也是一个异步生成器函数）。看起来是这样的：

blobstream = [1,2,3]

async function* main() {
//            ^−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− generator function
    for await (const blob of containerClient.listBlobsFlat()) {
        const blockBlobClient = containerClient.getBlockBlobClient(blob.name);

        const downloadBlockBlobResponse = await blockBlobClient.download(0);
        const download = await blobToString(await downloadBlockBlobResponse.blobBody);
        console.log(download);
        yield download;
//      ^^^^^−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− yield a result
    }
}

Async generator函数返回异步生成器，您可以在

中使用它来等待

循环（或直接）：

下面是一个使用

setTimeout

模拟异步部分的示例：

const delay=（ms，value）=>新承诺（resolve=>setTimeout（resolve，ms，value））；
异步函数somethingAsync（值）{
等待延迟（Math.random（）*1000+200）；
返回值*2；
}
异步函数*main（）{
for（常量值为[1,2,3,4]）{
const x=等待某物同步（值）；
产量x；
}
}
（异步（）=>{
试一试{
控制台日志（“启动”）；
用于等待（main（）的常数x）{
控制台日志（x）；
}
控制台日志（“结束”）；
}捕获（e）{
console.error（e.message | | String（e））；
}
})();