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Rotating a 2-D (transposing a matrix) in JavaScript
Transpose:
The transpose of a matrix (2-D array) is simply a flipped version of the original matrix (2-D array). We can transpose a matrix (2-D array) by switching its rows with its columns.
Example
The code for this will be −
const arr = [ [1, 1, 1], [2, 2, 2], [3, 3, 3], ]; const transpose = arr => { for (let i = 0; i < arr.length; i++) { for (let j = 0; j < i; j++) { const tmp = arr[i][j]; arr[i][j] = arr[j][i]; arr[j][i] = tmp; }; } } transpose(arr); console.log(arr);
Output
The output in the console −
[ [ 1, 2, 3 ], [ 1, 2, 3 ], [ 1, 2, 3 ] ]
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