转置JavaScript多维数组

function transposeArray(arr) {
  var rows = arr.length;
  var cols = arr[0].length;
  var transposedArray = [];

  for (var i = 0; i < cols; i++) {
    transposedArray[i] = [];
    for (var j = 0; j < rows; j++) {
      transposedArray[i][j] = arr[j][i];
    }
  }

  return transposedArray;
}

var originalArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
var transposedArray = transposeArray(originalArray);
console.log(transposedArray);

function transposeArray(arr) {
  return arr[0].map((col, i) => arr.map(row => row[i]));
}

var originalArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
var transposedArray = transposeArray(originalArray);
console.log(transposedArray);