MatrixCopy

/**

 * MatrixCopy (v1.0)

 * GoToLoop (2018/Jan/12)

 *

 * Forum.Processing.org/two/discussion/25921/

 * problems-with-transpose-a-2d-array-or-matrix#Item_7

 *

 * OpenProcessing.org/sketch/496288

 */

​

final int[][] matrix = {

  {0, 0, 0}, 

  {0, 1, 0}, 

  {1, 1, 1}

};

​

final int[][] cloned = new int[3][3];

​

void setup() {

  matrixCopyInt(matrix, cloned);

​

  showMatrixInt(matrix);

  println();

​

  showMatrixInt(cloned);

  exit();

}

​

static final void showMatrixInt(final int[][] arr2d) {

  for (final int[] arr1d : arr2d)  println(str(arr1d));

}

​

static final void matrixCopyInt(final int[][] src2d, final int[][] dst2d) {

  for (int len = min(src2d.length, dst2d.length), i = 0; i < len; ++i) {

    final int[] src1d = src2d[i], dst1d = dst2d[i];

    final int items = min(src1d.length, dst1d.length);

    arrayCopy(src1d, dst1d, items);

  }

}