如何找到数组中非零值的最大集合的平均值？

function findMaxNonZeroAverage(arr) {
  let nonZeroArr = arr.filter(num => num !== 0); // 过滤出非零值
  nonZeroArr.sort((a, b) => b - a); // 降序排序

  let maxSet = [];
  let maxSetSize = 0;
  let currentSet = [];
  let currentSetSize = 0;

  for (let i = 0; i < nonZeroArr.length; i++) {
    if (currentSetSize === 0 || nonZeroArr[i] === currentSet[currentSetSize - 1] - 1) {
      currentSet.push(nonZeroArr[i]);
      currentSetSize++;
    } else {
      if (currentSetSize > maxSetSize) {
        maxSet = currentSet;
        maxSetSize = currentSetSize;
      }
      currentSet = [nonZeroArr[i]];
      currentSetSize = 1;
    }
  }

  if (currentSetSize > maxSetSize) {
    maxSet = currentSet;
    maxSetSize = currentSetSize;
  }

  let sum = maxSet.reduce((acc, num) => acc + num, 0);
  let average = sum / maxSetSize;

  return average;
}

// 示例用法
let arr = [1, 2, 0, 4, 5, 0, 7, 8, 9, 0, 11, 12];
let average = findMaxNonZeroAverage(arr);
console.log(average);