This topic has been discussed before:
http://www.jsoftware.com/pipermail/programming/2018-November/052287.html
Another way to learn is to study J Phrases, specially section 4.B.,
accessible through Help, Vocabulary, Phr.
~ Gilles
Le 2020-11-13 à 15:00, R.E. Boss a écrit :
$.$.M
0 0 │ 1
0 1 │ 2
0 2 │ 3
0 3 │ 4
1 0 │ 5
1 1 │ 6
1 2 │ 7
1 3 │ 8
2 0 │ 9
2 1 │ 10
2 2 │ 11
2 3 │ 12
R.E. Boss
...
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