如何计算数组中的最大中值

function quickSort(arr) {
  if (arr.length <= 1) {
    return arr;
  }

  const pivotIndex = Math.floor(arr.length / 2);
  const pivot = arr.splice(pivotIndex, 1)[0];
  const left = [];
  const right = [];

  for (let i = 0; i < arr.length; i++) {
    if (arr[i] < pivot) {
      left.push(arr[i]);
    } else {
      right.push(arr[i]);
    }
  }

  return quickSort(left).concat([pivot], quickSort(right));
}

function calculateMaxMedian(arr) {
  const sortedArr = quickSort(arr);
  const length = sortedArr.length;
  let maxMedian;

  if (length % 2 === 0) {
    const midIndex = length / 2;
    maxMedian = (sortedArr[midIndex - 1] + sortedArr[midIndex]) / 2;
  } else {
    const midIndex = Math.floor(length / 2);
    maxMedian = sortedArr[midIndex];
  }

  return maxMedian;
}

const arr = [5, 2, 9, 1, 7, 6];
const maxMedian = calculateMaxMedian(arr);
console.log(maxMedian);