As your file is new, it is empty, as Julian noted.
What you get if you append an empty list like that is a row of fills, i.e.
in the case of a literal, a row of spaces:
'|',.('',4 5$'abc'),.'|'
| |
|abcab|
|cabca|
|bcabc|
|abcab|
a. i. 0{'',4 5$'abc'
32 32 32 32 32
Best regards,
Jan-Pieter
On Thu, Apr 8, 2021, 08:21 Julian Fondren <[email protected]> wrote:
> This is unrelated to jmf:
>
> $'',4 5$'abc'
> 5 5
> '',4 5$'abc'
>
> abcab
> cabca
> bcabc
> abcab
> 0 { '',4 5$'abc'
>
>
> require'jmf'
> map_jmf_'A';'~temp/newFile'
> A =: 4 5$'abc'
> unmap_jmf_ 'A'
> 0
> map_jmf_'B';'~temp/newFile'
> B
> abcab
> cabca
> bcabc
> abcab
>
> On 2021-04-08 01:13, David Lambert wrote:
> > unexpected empty first index
> >
> > $ ~/downloads/installs/j903/jconsole.sh
> > JVERSION
> > Engine: j903/j64avx2/linux
> > Beta-h: commercial/2021-04-05T15:15:39
> > Library: 9.03.03
> > Platform: Linux 64
> > Installer: J903 install
> > InstallPath: /home/lambertdw/downloads/installs/j903
> > Contact: www.jsoftware.com
> >
> > require'jmf'
> > createjmf_jmf_'~temp/newFile';8888
> > map_jmf_'A';'~temp/newFile'
> >
> > A=:A,4 5$'abc'
> > A
> >
> > abcab
> > cabca
> > bcabc
> > abcab
> > 0 { A
> >
> > NB. ???
> >
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
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>
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