Is there a simple way to add single lines and rows around an existing array, like a boundary box.
E.g.:
1 2 3 4
4 5 6 7
7 8 9 0
shoud go to:
11 11 11 11 11 11
11 1 2 3 4 11
11 4 5 6 7 11
11 7 8 9 0 11
11 11 11 11 11 11
Best Answer