Ah, never mind - this works fine in jconsole:
l=.({.~i.&LF)memr b,0,s[(c,' fgets *c *c i *')cd(<b=.mema
s);(s=.256);<f=.{.(c,' fdopen * i *c')cd(d=.0 cd~' dup > i
i',~c=.unxlib'c');1 1$'r'
(Though repeated use should split that between setup and the actual
line read, and of course, you would want a larger value for s if you
wanted to read longer lines.)
Thanks,
--
Raul
On Thu, Jun 21, 2018 at 11:02 AM Raul Miller <rauldmil...@gmail.com> wrote:
>
> Oddly, that doesn't work on my machine.
>
> It looks plausible, though.
>
> Thanks,
>
> --
> Raul
> On Thu, Jun 21, 2018 at 3:09 AM Xiao-Yong Jin <meta....@gmail.com> wrote:
> >
> > You can also call c library functions.
> >
> > l=.({.~i.&LF)memr b,0,s[(c,' fgets *c *c i *')cd(<b=.mema
> > s);(s=.256);<f=.{.(c,' fdopen * i *c')cd(d=.0 cd~' dup > i
> > i',~c=.unxlib'c');1 1$'r'
> > hello read line
> > (;$)l
> > ┌───────────────┬──┐
> > │hello read line│15│
> > └───────────────┴──┘
> > (c,' fclose i *')cd<f
> >
> >
> > > On Jun 19, 2018, at 8:13 PM, Raul Miller <rauldmil...@gmail.com> wrote:
> > >
> > > Actually, thinking about this - 1!:1 reads the whole file, so it's
> > > stty won't make a difference .- you'd need to use control-D to
> > > terminate everything you send to it interactively.
> > >
> > > One approach - not incredibly efficient, but interactive
> > > line-at-a-time input isn't about efficiency, might be:
> > >
> > > LINE=: 2!:0'read line; echo "$line"'
> > >
> > > This relies on 2!:0 being handled by /bin/sh (and note that you'll get
> > > a trailing LF character when you do this). The double quotes are so
> > > that redundant whitespace isn't removed by the shell...
> > >
> > > Or, if you want that as a verb:
> > >
> > > readline=: 2!:0 bind 'read line; echo "$line"'
> > >
> > > I hope this helps.
> > >
> > > --
> > > Raul
> > > On Tue, Jun 19, 2018 at 8:57 PM Raul Miller <rauldmil...@gmail.com> wrote:
> > >>
> > >> Ah.. experimenting with this:
> > >>
> > >> stdin'' reads till end of file (hit control-D to finish input)
> > >> readln'' as defined in this thread returns immediately, reading an empty
> > >> string.
> > >>
> > >> At least on *my* system.
> > >>
> > >> I tried running
> > >>
> > >> stty eol ^J before starting J, thinking that would fix it, but it did
> > >> not. But I'm running OSX where it might be that there's some "new and
> > >> improved" mechanism for defining the end of line character.
> > >>
> > >> Anyways, this is likely an OS issue and the solution probably will
> > >> depend on your OS.
> > >>
> > >> I hope this helps,
> > >>
> > >> --
> > >> Raul
> > >>
> > >> On Tue, Jun 19, 2018 at 8:41 PM Eric Iverson <eric.b.iver...@gmail.com>
> > >> wrote:
> > >>>
> > >>> I think the replies here miss an important part of the question. The #!
> > >>> script.
> > >>>
> > >>> #! /usr/bin/j8
> > >>> stdin''
> > >>>
> > >>> On Tue, Jun 19, 2018 at 8:21 PM, Don Guinn <dongu...@gmail.com> wrote:
> > >>>
> > >>>> It appears that the right argument is ignored. Perhaps have it be
> > >>>> displayed
> > >>>> on the same line as the input.
> > >>>>
> > >>>> readln 'Name: '
> > >>>>
> > >>>> On Tue, Jun 19, 2018 at 6:18 PM Raul Miller <rauldmil...@gmail.com>
> > >>>> wrote:
> > >>>>
> > >>>>> 1 -:&(3!:3) 01
> > >>>>> 1
> > >>>>>
> > >>>>> No difference in what's represented, so the only difference is in how
> > >>>>> you type it / the leading zero / ...
> > >>>>>
> > >>>>> Thanks,
> > >>>>>
> > >>>>> --
> > >>>>> Raul
> > >>>>>
> > >>>>> On Tue, Jun 19, 2018 at 8:15 PM Devon McCormick <devon...@gmail.com>
> > >>>>> wrote:
> > >>>>>>
> > >>>>>> How does "01" differ from "1" in this context?
> > >>>>>>
> > >>>>>> "readln" works for me within a session but I think James wants to do
> > >>>>>> something like pipe input into a J script. This is not something
> > >>>>>> I've
> > >>>>> done
> > >>>>>> but it would be interesting if we can do it.
> > >>>>>>
> > >>>>>> On Tue, Jun 19, 2018 at 5:10 PM, Henry Rich <henryhr...@gmail.com>
> > >>>>> wrote:
> > >>>>>>
> > >>>>>>> ? The 01 is correct as it stands. On Windows I get correct
> > >>>> operation:
> > >>>>>>>
> > >>>>>>> readln =: [: (1!:01) 1:
> > >>>>>>> readln''
> > >>>>>>> abcdefg
> > >>>>>>> abcdefg
> > >>>>>>>
> > >>>>>>> The first line is what I typed, the second is the JE's result
> > >>>>>>>
> > >>>>>>> Henry Rich
> > >>>>>>>
> > >>>>>>>
> > >>>>>>> On 6/19/2018 5:05 PM, james faure wrote:
> > >>>>>>>
> > >>>>>>>> Either way, it's no good
> > >>>>>>>>
> > >>>>>>>> ________________________________
> > >>>>>>>> From: Programming <programming-boun...@forums.jsoftware.com> on
> > >>>>> behalf
> > >>>>>>>> of devonmcc <devon...@gmail.com>
> > >>>>>>>> Sent: Tuesday, June 19, 2018 11:00:39 PM
> > >>>>>>>> To: programm...@jsoftware.com
> > >>>>>>>> Subject: Re: [Jprogramming] getline
> > >>>>>>>>
> > >>>>>>>> The "01" following the "!:" is probably supposed to be "0]1".
> > >>>>>>>>
> > >>>>>>>>
> > >>>>>>>> Sent from my Verizon, Samsung Galaxy smartphone
> > >>>>>>>> -------- Original message --------From: Michal Wallace <
> > >>>>>>>> michal.wall...@gmail.com> Date: 6/19/18 16:06 (GMT-05:00) To:
> > >>>>>>>> programm...@jsoftware.com Subject: Re: [Jprogramming] getline
> > >>>>>>>> readln =: [: (1!:01) 1:
> > >>>>>>>>
> > >>>>>>>>
> > >>>>>>>>
> > >>>>>>>>
> > >>>>>>>> On Tue, Jun 19, 2018 at 2:45 PM james faure <james.fa...@epitech.eu
> > >>>>>
> > >>>>>>>> wrote:
> > >>>>>>>>
> > >>>>>>>> Hello, how can one read stdin one line at a time ?
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>> #! /usr/bin/j8
> > >>>>>>>>>
> > >>>>>>>>> stdin''
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>> is no good.
> > >>>>>>>>>
> > >>>>> ----------------------------------------------------------------------
> > >>>>>>>>> For information about J forums see
> > >>>>> http://www.jsoftware.com/forums.htm
> > >>>>>>>>>
> > >>>>>>>> ------------------------------------------------------------
> > >>>> ----------
> > >>>>>>>> For information about J forums see
> > >>>>> http://www.jsoftware.com/forums.htm
> > >>>>>>>> ------------------------------------------------------------
> > >>>> ----------
> > >>>>>>>> For information about J forums see
> > >>>>> http://www.jsoftware.com/forums.htm
> > >>>>>>>> ------------------------------------------------------------
> > >>>> ----------
> > >>>>>>>> For information about J forums see
> > >>>>> http://www.jsoftware.com/forums.htm
> > >>>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>> ---
> > >>>>>>> This email has been checked for viruses by AVG.
> > >>>>>>> https://www.avg.com
> > >>>>>>>
> > >>>>>>>
> > >>>>>>> ------------------------------------------------------------
> > >>>> ----------
> > >>>>>>> For information about J forums see http://www.jsoftware.com/
> > >>>> forums.htm
> > >>>>>>>
> > >>>>>>
> > >>>>>>
> > >>>>>>
> > >>>>>> --
> > >>>>>>
> > >>>>>> Devon McCormick, CFA
> > >>>>>>
> > >>>>>> Quantitative Consultant
> > >>>>>> ----------------------------------------------------------------------
> > >>>>>> For information about J forums see
> > >>>>>> http://www.jsoftware.com/forums.htm
> > >>>>> ----------------------------------------------------------------------
> > >>>>> For information about J forums see http://www.jsoftware.com/forums.htm
> > >>>> ----------------------------------------------------------------------
> > >>>> For information about J forums see http://www.jsoftware.com/forums.htm
> > >>>>
> > >>> ----------------------------------------------------------------------
> > >>> For information about J forums see http://www.jsoftware.com/forums.htm
> > > ----------------------------------------------------------------------
> > > For information about J forums see http://www.jsoftware.com/forums.htm
> >
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
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