The reported error is that the list 5 5 is too long. That's a length
error.
You could consider that y has insufficient rank for x, but the
convention in the interpreter is to blame x rather than y.
Henry Rich
On 2/20/2023 9:52 AM, bill lam wrote:
5 5{. 0 0$''
5 5{.''
|length error
| 5 5 {.''
But this looks like a rank error to me.
On Mon, 20 Feb 2023 at 10:39 PM Raul Miller <[email protected]> wrote:
Generally speaking, errors of this sort are "heuristic" -- the idea is
to catch coding issues which were probably mistakes.
Also, in contexts where ($) could produce the same result as ({.), you
could append a desired fill element $'s right argument.
Or, at least, that's how I understand it.
--
Raul
On Mon, Feb 20, 2023 at 9:27 AM Jan-Pieter Jacobs
<[email protected]> wrote:
Looking through the implementation of dev/eformat, I found this line
which
puzzled me:
https://github.com/jsoftware/dev_eformat/blob/4c285152bb27c2bfcb474738ea3b839e4ce96d0d/eformat.ijs#L496
There's nothing wrong with that line, or with the fact it triggers an
error, but it does indicate that $ raises an error in a situation where
{.
does not, i.e. reshaping an empty array errors, while overtaking from one
does not.
Indeed, 5 $ '' or 5$ 0$0 give an error, while 5 {. '' and 5 {. 0$0 just
work, producing arrays of 5 spaces or zeros as expected. 5 $!.'' '' also
works, as does 5$!.1 ''.
Why wouldn't $ be able to see the data type (and thereby, fill element)
of
it's y argument, and fill accordingly? As far as I remember, any noun in
J
has a datatype, and a fill element. As the the fill element is a scalar,
the dimensionality being different in the case of $ shouldn't matter
either.
Is there anything I'm missing, or is this really an inconsistency without
any reason for existence?
Best regards,
Jan-Pieter
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