1
var transpose = function (matrix) {
2
  let result = [];
3
  for (let i = 0; i < matrix[0].length; i++) {
4
    let col = [];
5

6
    for (let j = 0; j < matrix.length; j++) {
7
      col.push(matrix[j][i]);
8
    }
9
    result.push(col);
10
  }
11
  return result;
12
};
13

14
console.log(
15
  transpose([
16
    [1, 2, 3],
17
    [4, 5, 6],
18
    [7, 8, 9],
19
  ])
20
);