在瀑布中链接许诺 [英] Chaining promises in a waterfall

问题描述

我一直在用几种不同的方式链接一组函数，但似乎找不到我特别喜欢的函数.以下是我确定的最后一个，但仍然不感兴趣.

I've been playing around with a few different ways of chaining a collection of functions and can't seem to find one I particularly like. The following is the last one I settled on but am still not keen on it.

有人可以提出一种更简洁，更简洁的模式吗?我不想选择Async.js或库.

Can someone suggest a cleaner and more concise pattern? I don't want to opt for Async.js or a library.

[
  this.connectDatabase.bind(this),
  this.connectServer.bind(this),
  this.listen.bind(this)
].reduce(
  (chain, fn) => {
    let p = new Promise(fn);
    chain.then(p);
    return p;
  },
  Promise.resolve()
);

Ps.任何其他提示都值得欢迎.

Ps. any other tips are more than welcomed.

推荐答案

在stackoverflow上找到了关于如何动态链接承诺的以下解决方案:

Found this solution on stackoverflow on how you can chain promises dynamically:

iterable.reduce((p, fn) => p.then(fn), Promise.resolve())

完整的帖子在这里: https://stackoverflow.com/a/30823708/4052701

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