JavaScript Async Generator that yields in the order of the earliest completion of the promises

promiseMarathon.js

const util = require("util")

function delay(time, data) {
  return new Promise((res, rej) => {
    setTimeout(() => res(data), time);
  })
}

async function *promiseMarathon(...promises) {
  while (promises.length > 0) {
    const finish = await Promise.race(promises).then(f => {
      promises = promises.filter(p => util.inspect(p).includes("pending"));
      return f;
    });
    yield finish;
  }
}

async function test() {
  for await(const p of promiseMarathon(delay(3000, [1, 2, 3]), delay(2000, [10, 20, 30]), delay(1000, [100, 200, 300]))) {
    console.log(p);
  }
}
/*
[ 100, 200, 300 ]
[ 10, 20, 30 ]
[ 1, 2, 3 ]
*/

// async function test() {
//   for await(const p of promiseMarathon(delay(0, [1, 2, 3]), delay(0, [10, 20, 30]), delay(0, [100, 200, 300]))) {
//     console.log(p);
//   }
// }

// test();
/*
[ 1, 2, 3 ]
[ 10, 20, 30 ]
[ 100, 200, 300 ]
*/

// async function test() {
//   for await(const p of promiseMarathon(delay(1000, [1, 2, 3]), delay(3000, [10, 20, 30]), delay(2000, [100, 200, 300]))) {
//     console.log(p);
//   }
// }

// test();
/*
[ 1, 2, 3 ]
[ 100, 200, 300 ]
[ 10, 20, 30 ]
*/