如何使用数组的.length方法等待/异步？

function processData(array, callback) {
  // 执行一些异步操作
  setTimeout(() => {
    // 模拟异步操作完成
    callback(array.length);
  }, 2000);
}

const myArray = [1, 2, 3];
processData(myArray, length => {
  console.log(`数组长度为：${length}`);
});

function getData(array) {
  return new Promise(resolve => {
    setTimeout(() => {
      // 模拟异步操作完成
      resolve(array.length);
    }, 2000);
  });
}

const myArray = [1, 2, 3];
getData(myArray)
  .then(length => {
    console.log(`数组长度为：${length}`);
  });

function getData(array) {
  return new Promise(resolve => {
    setTimeout(() => {
      // 模拟异步操作完成
      resolve(array.length);
    }, 2000);
  });
}

async function processArray(array) {
  const length = await getData(array);
  console.log(`数组长度为：${length}`);
}

const myArray = [1, 2, 3];
processArray(myArray);