sortByAscendingDemo.js

function sortByAscendingDemo(orders) {
  // Sorting works by comparing two values in a callback.
  // When o1.quantity < 0, then o1 comes before o2.
  // When o2.quantity < 0, then o2 comes before o1.
  // When o1.quantity === o2.quantity then no change is needed
  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort
  var oderedOrders = orders.sort((o1, o2) => o1.quantity - o2.quantity);
  printOrders(oderedOrders);
}