tech-interview-handbook/apps/website/experimental/utilities/javascript/matrixTranspose.js

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

const deepEqual = require('./deepEqual');

console.log(deepEqual(matrixTranspose([[1]]), [[1]]));
console.log(deepEqual(matrixTranspose([[1, 2]]), [[1], [2]]));
console.log(
  deepEqual(
    matrixTranspose([
      [1, 2],
      [1, 4],
    ]),
    [
      [1, 1],
      [2, 4],
    ],
  ),
);
console.log(
  deepEqual(
    matrixTranspose([
      [1, 2, 3],
      [4, 5, 6],
    ]),
    [
      [1, 4],
      [2, 5],
      [3, 6],
    ],
  ),
);