Oops, the second line doesn't need to be there.
This works:
#!/bin/sh
exec $HOME/j901/bin/jconsole $0 [</dev/null
sleep=:(2!:0)@('sleep ',":)
([sleep@1)@stderr^:3'.'
stderr LF
Thanks,
--
Raul
On Mon, Jan 27, 2020 at 12:31 PM Raul Miller <rauldmil...@gmail.com> wrote:
>
> Here's a little toy:
>
> #!/bin/sh
> exec=:[:
> exec $HOME/j901/bin/jconsole $0 [</dev/null
> sleep=:(2!:0)@('sleep ',":)
> ([sleep@1)@stderr^:3'.'
> stderr LF
>
> (This is a somewhat minimal shell script which you can run from the
> unix command line, which assumes that you've got jconsole installed in
> your home directory so it can run that. It prints three dots to
> stderr, while waiting 3 seconds.)
>
> If you can understand why each of those lines exist here, you're money
> ahead for using j scripts from the unix command line.
>
> (But that requires understanding some subtle details of shell script
> syntax -- why do those two 'exec' lines doing, for example? And, some
> subtle details of J syntax -- why does this work at all in J and why
> would removing or changing either of those exec lines make such a
> difference?)
>
> Briefly, though -- the first three lines need to be valid J and valid
> shell script. The remaining lines only need to be valid J.
>
> Followups which discuss the shell side of things probably belong in
> the chat forum. Followups which discuss the J side of things (or the
> combination), of course, still belong here.
>
> Thanks,,
>
> --
> Raul
>
> On Mon, Jan 27, 2020 at 2:39 AM bill lam <bbill....@gmail.com> wrote:
> >
> > J base library contains a verb stderr which is 1!:2&5
> > you can try
> >
> > empty@stderr '.'
> >
> > Mon, 27 Jan 2020, jprogramming написал(а):
> > > 27.01.2020 5:00, Julian Fondren:
> > > > #! /usr/bin/env ijconsole
> > > > dot =: 3 : '''.'' 1!:3 <''/proc/self/fd/1'''
> > > > hardwork =: 3 : 0
> > > > n =. 0
> > > > for_i. i.100 do.
> > > > dot''
> > > > n =. n + 2 | !!8x
> > > > end.
> > > > n
> > > > )
> > > > echo hardwork''
> > > > exit 0
> > >
> > > Great! Thank you!
> > > I slightly modified your function:
> > >
> > > print =: 3 : 'y 1!:3 <''/proc/self/fd/1'''
> > >
> > > Is there any difference in using 1!: 2 and 1!: 3 for the screen?
> > > I have not found.
> > >
> > > Sergey.
> > > ----------------------------------------------------------------------
> > > For information about J forums see http://www.jsoftware.com/forums.htm
> >
> > --
> > regards,
> > ====================================================
> > GPG key 1024D/4434BAB3 2008-08-24
> > gpg --keyserver subkeys.pgp.net --armor --export 4434BAB3
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
----------------------------------------------------------------------
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