matrix: repeat last number before zero

[gigiolone123]

look that:

4 3 2 5
0 4 0 5
5 0 0 0
6 1 4 1

i want to repeat the last element before zero

it result:

4 3 2 5
4 4 2 5
5 4 2 5
6 1 4 1

it's possibile to avoid loop? thank



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