如何比较和提取另一个数组中的数组

function compareAndExtractArrays(arr1, arr2) {
  var extractedArrays = [];

  for (var i = 0; i < arr1.length; i++) {
    var currentArray = arr1[i];

    for (var j = 0; j < arr2.length; j++) {
      if (arraysAreEqual(currentArray, arr2[j])) {
        extractedArrays.push(arr2[j]);
        break;
      }
    }
  }

  return extractedArrays;
}

function arraysAreEqual(arr1, arr2) {
  if (arr1.length !== arr2.length) {
    return false;
  }

  for (var i = 0; i < arr1.length; i++) {
    if (arr1[i] !== arr2[i]) {
      return false;
    }
  }

  return true;
}

// 示例用法
var array1 = [[1, 2], [3, 4], [5, 6]];
var array2 = [[3, 4], [7, 8], [1, 2]];

var extractedArrays = compareAndExtractArrays(array1, array2);
console.log(extractedArrays);