如何按姓氏排序并打印新数组？

const names = ["John Smith", "Jane Johnson", "David Lee", "Sarah Williams"];

const sortedNames = names.sort((a, b) => {
  const lastNameA = a.split(" ")[1];
  const lastNameB = b.split(" ")[1];
  return lastNameA.localeCompare(lastNameB);
});

const lastNameArray = [];
sortedNames.forEach(name => {
  const lastName = name.split(" ")[1];
  lastNameArray.push(lastName);
});

console.log(lastNameArray);