Echo JS 0.11.0

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tracker1 2898 days ago. link 2 points ▲ ▼
I'll often use both, but not in the same places... async functions when called return a promise... you can await anything that returns a promise.

I'll often refactor some pieces that make sense as functions that return a straight promise (especially if using callback code.

    const foo = () => new Promise((res,rej) => {
      someCbFunction((err, result) => err ? rej(err) : res(result);
    });

There are times it's just easier to think imperatively... A great example is a promise that will retry N times on rejection before raising the rejection... try this with promises alone and you'll drive yourself bonkers.

Replies

kirilloid 2892 days ago. link 1 point ▲ ▼
As a matter of fact, retry it's not very hard to write in pure promises:

    const retry = (fn, times) =>
      times >= 0
      ? fn().catch(() => retry(fn, times-1))
      : fn();