Hi
I thought the J dictionary is comprehensive. However, I think the
definition for From isn't. See http://jsoftware.com/help/dictionary/d520.htm
<quote>
[0]If x is an integer in the range from -n=: #y to n-1 , then x{y selects
item n|x from y .
......
[1]More generally, >x may be a list whose successive elements are
(possibly) boxed arrays that specify selection along successive axes of y .
[2]Finally, if any r=:>j{>x used in the selection is itself boxed,
selection is made by the indices along that axis that do not occur in >r .
[3]Note that the result in the very last dyadic example, that is, (<<<_1){m
, is all except the last item.
</quote>
[0] is the case when x is an integer.
[1] is the case for (<2 0;1 3){t.
[2] is the case for (<<<1){t.
Where is the description for the case of (2 0;1 3){t in the definition
above? I inferenced its meaning from running and reading other texts(like J
for C).
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