ex4-diceRace.js

/*------------------------------------------------------------------------------
Full description at: https://github.com/HackYourFuture/Assignments/blob/main/3-UsingAPIs/Week2/README.md#exercise-4-dice-race

1. Complete the function `rollDice()` by using `.map()` on the `dice` array 
   to create an array of promises for use with `Promise.race()`.
2. Refactor the function `main()` using async/await and try/catch.
3. Once you got this working, you may observe that some dice continue rolling 
   for some undetermined time after the promise returned by `Promise.race()` 
   resolves. Do you know why? Add your answer as a comment to the bottom of the 
   file.
------------------------------------------------------------------------------*/
// ! Do not remove these lines
import { rollDie } from '../../helpers/pokerDiceRoller.js';
/** @import {DieFace} from "../../helpers/pokerDiceRoller.js" */

export async function rollDice() {
  const dice = [1, 2, 3, 4, 5];
  const dicePromises = dice.map((die) => rollDie(die));
  const winner = await Promise.race(dicePromises);
  return winner;
}

async function main() {
  try {
    const result = await rollDice();
    console.log('Resolved!', result);
  } catch (error) {
    console.log('Rejected!', error.message);
  }
}

if (process.env.NODE_ENV !== 'test') {
  main();
}

/*
Explanation:
Some dice keep rolling because Promise.race() only stops for the first finished promise.
The other promises keep running in the background.
*/