// helpers
function sleep(ms: number) {
    return new Promise<void>(resolve => setTimeout(resolve, ms));
}
async function returnAfter<T>(time: number, value: T) {
    await sleep(time);
    return value;
}

// main subject of gist
async function sleepSort(array: number[]) {
    const sortedArray: number[] = [];
    await Promise.all(array.map(async number => {
        await returnAfter(number * array.length, number);
        sortedArray.push(number);
    }));
    return sortedArray;
}

// run the async main function
(async () => {
    console.log(await sleepSort([ 1, 12, 5, 7, 3, 17, 6, 15, 4, 2, 19, 9 ]));
})();