Sorting in Javascript

javascript-sort.js

/**
 * @function
 * @template T
 * @param {T} item
 * @return {Promise.<T>}
 */
const sortItem = function (item) {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      this.store(item);
    }, item);
  });
};

/**
 * @function
 * @template T
 * @param {T[]} items
 * @return {Promise.<T[]>}
 */
const sortItems = function (items) {
  return new Promise((resolve) => {
    const sorted = [];
    
    items.forEach(
      sortItem.bind({
        store: function (item) {
          sorted.push(item);
          
          if (sorted.length == items.length) {
            resolve(sorted);
          }
        },
      })
    );
  });
}

async function main() {
  const items = [10, 5, 20, 20, 50, 100, 1, 200, 30];
  const sorted = await sortItems(items);

  console.log(items); // [ 10, 5, 20, 20, 50, 100, 1, 200, 30 ]
  console.log(sorted); // [ 1, 5, 10, 20, 20, 30, 50, 100, 200 ]
}

main();