给定该数组的数组，我如何计算包含重复元素的数组的数量？

function countDuplicateArrays(arr) {
  const dict = {};
  let count = 0;

  for (let i = 0; i < arr.length; i++) {
    if (dict[arr[i]]) {
      dict[arr[i]]++;
    } else {
      dict[arr[i]] = 1;
    }
  }

  for (const key in dict) {
    if (dict[key] > 1) {
      count += dict[key];
    }
  }

  return count;
}

const arr = [1, 2, 3, 3, 4, 5, 5];
const duplicateCount = countDuplicateArrays(arr);
console.log('Duplicate Array Count:', duplicateCount);