Transpose matrix
Transposes a two-dimensional array.
- Use
Array.prototype.map()
to create the transpose of the given two-dimensional array.
const transpose = arr => arr[0].map((col, i) => arr.map(row => row[i])); transpose([[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]); // [[1, 4, 7, 10], [2, 5, 8, 11], [3, 6, 9, 12]