Running async operations in parallel and harvesting the results. Concurrency limit applied correctly

[parallel-promises]-take3-subtake1-part1.js

async function take3subtake1part1() {
  const concurrencyLimit = 5;
  // Enhance arguments array to have an index of the argument at hand
  const argsCopy = [].concat(listOfArguments.map((val, ind) => ({ val, ind })));
  const result = new Array(listOfArguments.length);
  const promises = new Array(concurrencyLimit).fill(Promise.resolve());
  // Recursively chain the next Promise to the currently executed Promise
  function chainNext(p) {
    if (argsCopy.length) {
      const arg = argsCopy.shift();
      return p.then(() => {
        // Store the result into the array upon Promise completion
        const operationPromise = asyncOperation(arg.val).then(r => { result[arg.ind] = r; });
        return chainNext(operationPromise);
      });
    }
    return p;
  }

  await Promise.all(promises.map(chainNext));
  return result;
}