A Python function that transposes a square matrix in-place by swapping rows and columns across the diagonal. This solution demonstrates advanced 2D array manipulation, algorithmic optimization, and ...

Given a 2D integer array matrix, return the transpose of matrix. The transpose of a matrix is the matrix flipped over its main diagonal, switching the matrix's row and column indices.

\[A=\left[\begin{align}& a_{11}\space\space a_{12}\space\space a_{13}\\& a_{21}\space\space a_{22}\space\space a_{23}\end{align}\right]\] The elements are the entries ...