That's because control-l is a readline feature. Regards, Elias On 28 May 2014 00:40, "Juergen Sauermann" <juergen.sauerm...@t-online.de> wrote:
> Hi, > > in immediate execution mode you can do: > > * )HOST tput clear* > > which is rather portable. In programs, you can do the same: > > * 'lib_file_io.so' ⎕FX 'FILE_IO' ◊ FILE_IO[25] FILE_IO[24] 'tput > clear > /dev/tty'* > > Interestingly the ^L (aka ⎕AV[13]) is printed:: > > > *eedjsa@server64:~/projects/juergen/apl-1.3/src$ > <eedjsa@server64:~/projects/juergen/apl-1.3/src$> ./apl > x* > *... typing blindly ...* > *eedjsa@server64:~/projects/juergen/apl-1.3/src$ > <eedjsa@server64:~/projects/juergen/apl-1.3/src$> vi x* > > > * ______ _ __ __ __ ___ ____ __* > * / ____// | / // / / / / | / __ \ / /* > * / / __ / |/ // / / / / /| | / /_/ // /* > * / /_/ // /| // /_/ / / ___ | / ____// /___* > * \____//_/ |_/ \____/ /_/ |_|/_/ /_____/* > > * Welcome to GNU APL version 1.3 / 6786* > > * Copyright (C) 2008-2014 Dr. Jürgen Sauermann* > * Banner by FIGlet: www.figlet.org > <http://www.figlet.org>* > > * This program comes with ABSOLUTELY NO WARRANTY;* > * for details run: ./apl --gpl.* > > * This program is free software, and you are welcome to redistribute > it* > * according to the GNU Public License (GPL) version 3 or later.* > > *^[[30m^[[47m^[[K ⎕AV[13]* > *^[[30m^[[48m^[[K^L* > *^[[30m^[[47m^[[K )off* > *^[[m^[(B^[[K^[[30m^[[48m^[[K* > *Goodbye.* > *"x" 23L, 1104C > 11,24 All* > > If I "cat" the same file then the screen is not cleared. > > On 05/27/2014 02:46 AM, Elias Mårtenson wrote: > > That's a very alluring thing. :-) It's bad though, since it will come out > as garbage if the output device does not support it. > > Regards, > Elias > On 27 May 2014 08:43, "Frederick H. Pitts" <fred.pi...@comcast.net> wrote: > >> Blake, >> >> If you are looking for instant gratification, >> >> ⍞ ← (⎕UCS 27), '[2J' >> >> will do the job on any terminal that honors ansi escape sequences. >> >> Regards, >> >> Fred >> Retired Chemical Engineer >> >> On Mon, 2014-05-26 at 19:29 -0500, Blake McBride wrote: >> > Dear Elias, >> > >> > >> > On one hand, I would still love to see a basic ^L ability without >> > having to get into external code. >> > >> > >> > On the other hand, perhaps I should start to take a look at library >> > code. (I actually have over 20 years of C experience.) I fear my >> > reaction once I see how it works. I'm sure the possibilities are >> > endless. I haven't even looked at it yet. Is there a hello world >> > sample? >> > >> > >> > Thanks. >> > >> > >> > Blake >> > >> > >> > >> > >> > On Mon, May 26, 2014 at 6:47 PM, Elias Mårtenson <loke...@gmail.com> >> > wrote: >> > The correct way to do that is to use the native interface to >> > provide an interface to Curses. It should be fairly trivial to >> > implement. >> > >> > >> > On 27 May 2014 07:32, "Blake McBride" <blake1...@gmail.com> >> > wrote: >> > > >> > > If I execute ⎕AV[8] the terminal sounds the bell. If I type >> > ^L my xterm screen clears. I need one of the ⎕AV characters >> > to do what ^L does. That gives me the absolute basics of >> > screen IO. >> > > >> > > Thanks. >> > > >> > > Blake >> > > >> > >> > >> > >> > >> > >> >> >> >
