如何在 node.js 异步中的上部 scope 变量中插入值

Question

我想要输入buckets result1 。 但我想我对此有误解..
result2返回这个

Request {
  domain: null,
  service: Service {
    config: Config {
      credentials: [Credentials],
      credentialProvider: [CredentialProviderChain],
      region: 'ap-northeast-2',
      logger: null,
      apiVersions: {},
      apiVersion: null,
      endpoint: 's3.ap-northeast-2.amazonaws.com',
      httpOptions: [Object],
      maxRetries: undefined,
      maxRedirects: 10,

     ...

这是我的代码：

exports.printBuckets = () => {
  let result1 = []
  let result2 = s3.listBuckets((err, data) => {
    buckets = data.Buckets
    console.log(buckets); // Got AWS buckets from AWS!
    result1 = data.Buckets;
  });

  console.log(result1); // [] <- I want insert buckets data to here!
  console.log(result2); // Request object what i wrote up 
};

如何解决变量result1的值等于buckets的问题？

Answer 1

我对 async / await 有一个误解。现在我使用 async/await 和 promise 来修复它。

exports.printBuckets = async () => {
  let result = await s3.listBuckets().promise().then(result => result);

  console.log(result);
};