Re: about some potentially interesting unicode operators

scott@slp53.sl.home (Scott Lurndal) writes:

Michael S <already5chosen@yahoo.com> writes:

On Thu, 29 Aug 2024 09:59:49 -0700
Keith Thompson <Keith.S.Thompson+u@gmail.com> wrote:

Janis Papanagnou <janis_papanagnou+ng@hotmail.com> writes:

[...]

Keith, what does your keyboard produce when typing <Alt>-<7> ?
>
On my US keyboard it produces the '·'. Don't know whether that
is reliable, though. (I don't think it is; e.g. my Thunderbird
doesn't expand any character when entering <Alt> combinations.)

>
It produces the two-character sequence Escape 7.

>
Which 7? The one on numeric pad produces • in quite a lot of contexts.
The character appears after release of Alt key.

>
The numeric pad ALT-'7' produces <esc>[H (home cursor).

(I manually cleaned up some quoted-printable damage in the above.)

The numeric pad keys send different characters depending on whether Num
Lock is set.  I usually have it on.

Alt-7 sends the same thing (Escape-7) both for the 7 key above Y and U
and for the 7 key on the numeric pd.  With Num Lock off, that key acts
as the Home key; Home sends ^[[1~ and Alt-Home sends ^[[1;3H, where ^[
is Escape.

There are probably some subtleties I'm missing.  I rarely use either Alt
or AltGr.  I don't often need to type non-ASCII characters; when I do,
my most common approach is to use vim digraphs.  Possibly I could find a
method that's more convenient, but so far I haven't been motivated to do
so.

--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */