如何根据重复数组值创建新数组并计算平均值？

function createNewArrayWithAverage(arr) {
  // Step 1: 遍历原始数组，累加对应的值
  const sumMap = {};
  const countMap = {};
  for (let i = 0; i < arr.length; i++) {
    const value = arr[i];
    if (sumMap[value]) {
      sumMap[value] += value;
      countMap[value]++;
    } else {
      sumMap[value] = value;
      countMap[value] = 1;
    }
  }

  // Step 2: 创建新数组，计算平均值
  const newArray = [];
  for (const key in sumMap) {
    const sum = sumMap[key];
    const count = countMap[key];
    const average = sum / count;
    newArray.push({ key, average });
  }

  return newArray;
}

// 示例用法
const originalArray = [1, 2, 2, 3, 3, 3];
const newArray = createNewArrayWithAverage(originalArray);
console.log(newArray);