[Jprogramming] what is happening here?

[Raul Miller]

Does this make sense?

   5#:i.9
0 1 2 3 4 0 1 2 3
   5#:0j1+i.9
0j1 1j1 2j1 _2j1 _1j1 0j1 1j1 2j1 _2j1

-- 
Raul
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