Re: http://www.jsoftware.com/help/primer/single_atom_array.htm
it might be nice to say "this discrepancy between single atoms and lists
composed of single atoms extends to the compression of higher dimensions as
well. if you have a table and compress it down to a single row, it is still a
2-dimension table and not the same as a 1-dimension list, as this example shows:
i. 3 4
0 1 2 3
4 5 6 7
8 9 10 11
{. i. 3 4
0 1 2 3
$ {. i. 3 4
4
i. 1 4
0 1 2 3
$ i. 1 4
1 4
"
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