如何将异步函数*收集到数组中？

Question

Suppose I have an async function * () ( setup here ) like this:

const f = async function * () {
  yield * [ 1, 2, 3 ];
};

I can gather the results like this:

const xs = [];

for await (const x of f()) {
  xs.push(x);
}

But can I use the ... syntax to make this more compact?

Something like:

const xs = await f(); // xs = [ 1, 2, 3 ]

Answer 1

The best you can do is put it into a function:

const toArray = async f => {
  const xs = []; 
  for await (const x of f) {
    xs.push(x);
  }
  return xs;
};

Usage:

// In an async context
const xs = await toArray(f());