matrix_transposition.js

// Pair coded by @Sachieko and Bayan Safaee
const transpose = function(matrix) {
  let result = [];
  for (let i = 0; i < matrix[0].length; i++) {
    let row = [];
    for (const element of matrix) {
      row.push(element[i]);
    }
    result.push(row);
  }
  return result;
};

// Do not edit this function.
const printMatrix = (matrix) => {
  for (const row of matrix) {
    for (const el of row) {
      process.stdout.write(el + " ");
    }
    process.stdout.write("\n");
  }
};

printMatrix(
  transpose([
    [1, 2, 3, 4],
    [1, 2, 3, 4],
    [1, 2, 3, 4],
    [1, 2, 3, 4],
  ])
);

console.log("----");

printMatrix(
  transpose([
    [1, 2],
    [3, 4],
    [5, 6],
  ])
);

console.log("----");

printMatrix(transpose([[1, 2, 3, 4, 5, 6, 7]]));

// 1 1 1 1
// 2 2 2 2
// 3 3 3 3
// 4 4 4 4
// ----
// 1 3 5
// 2 4 6
// ----
// 1
// 2
// 3
// 4
// 5
// 6
// 7