From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject: Re: Ada and Unicode
Date: Sat, 09 Apr 2022 12:46:04 -0400 [thread overview]
Message-ID: <pjd35hp8i1l7qflnltn7r9cp61u1uh8dv2@4ax.com> (raw)
In-Reply-To: 62515f7a$0$25324$426a74cc@news.free.fr
On Sat, 9 Apr 2022 12:27:04 +0200, DrPi <314@drpi.fr> declaimed the
following:
>
>In Python-3, a string is a character(glyph ?) array. The internal
>representation is hidden to the programmer.
<SNIP>
>
>On the Ada side, I've still not understood how to correctly deal with
>all this stuff.
One thing to take into account is that Python strings are immutable.
Changing the contents of a string requires constructing a new string from
parts that incorporate the change.
That allows for the second aspect -- even if not visible to a
programmer, Python (3) strings are not a fixed representation: If all
characters in the string fit in the 8-bit UTF range, that string is stored
using one byte per character. If any character uses a 16-bit UTF
representation, the entire string is stored as 16-bit characters (and
similar for 32-bit UTF points). Thus, indexing into the string is still
fast -- just needing to scale the index by the character width of the
entire string.
--
Wulfraed Dennis Lee Bieber AF6VN
wlfraed@ix.netcom.com http://wlfraed.microdiversity.freeddns.org/
next prev parent reply other threads:[~2022-04-09 16:46 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-17 22:03 Ada and Unicode DrPi
2021-04-18 0:02 ` Luke A. Guest
2021-04-19 9:09 ` DrPi
2021-04-19 8:29 ` Maxim Reznik
2021-04-19 9:28 ` DrPi
2021-04-19 13:50 ` Maxim Reznik
2021-04-19 15:51 ` DrPi
2021-04-19 11:15 ` Simon Wright
2021-04-19 11:50 ` Luke A. Guest
2021-04-19 15:53 ` DrPi
2022-04-03 19:20 ` Thomas
2022-04-04 6:10 ` Vadim Godunko
2022-04-04 14:19 ` Simon Wright
2022-04-04 15:11 ` Simon Wright
2022-04-05 7:59 ` Vadim Godunko
2022-04-08 9:01 ` Simon Wright
2023-03-30 23:35 ` Thomas
2022-04-04 14:33 ` Simon Wright
2021-04-19 9:08 ` Stephen Leake
2021-04-19 9:34 ` Dmitry A. Kazakov
2021-04-19 11:56 ` Luke A. Guest
2021-04-19 12:13 ` Luke A. Guest
2021-04-19 15:48 ` DrPi
2021-04-19 12:52 ` Dmitry A. Kazakov
2021-04-19 13:00 ` Luke A. Guest
2021-04-19 13:10 ` Dmitry A. Kazakov
2021-04-19 13:15 ` Luke A. Guest
2021-04-19 13:31 ` Dmitry A. Kazakov
2022-04-03 17:24 ` Thomas
2021-04-19 13:24 ` J-P. Rosen
2021-04-20 19:13 ` Randy Brukardt
2022-04-03 18:04 ` Thomas
2022-04-06 18:57 ` J-P. Rosen
2022-04-07 1:30 ` Randy Brukardt
2022-04-08 8:56 ` Simon Wright
2022-04-08 9:26 ` Dmitry A. Kazakov
2022-04-08 19:19 ` Simon Wright
2022-04-08 19:45 ` Dmitry A. Kazakov
2022-04-09 4:05 ` Randy Brukardt
2022-04-09 7:43 ` Simon Wright
2022-04-09 10:27 ` DrPi
2022-04-09 16:46 ` Dennis Lee Bieber [this message]
2022-04-09 18:59 ` DrPi
2022-04-10 5:58 ` Vadim Godunko
2022-04-10 18:59 ` DrPi
2022-04-12 6:13 ` Randy Brukardt
2021-04-19 16:07 ` DrPi
2021-04-20 19:06 ` Randy Brukardt
2022-04-03 18:37 ` Thomas
2022-04-04 23:52 ` Randy Brukardt
2023-03-31 3:06 ` Thomas
2023-04-01 10:18 ` Randy Brukardt
2021-04-19 16:14 ` DrPi
2021-04-19 17:12 ` Björn Lundin
2021-04-19 19:44 ` DrPi
2022-04-16 2:32 ` Thomas
2021-04-19 13:18 ` Vadim Godunko
2022-04-03 16:51 ` Thomas
2023-04-04 0:02 ` Thomas
2021-04-19 22:40 ` Shark8
2021-04-20 15:05 ` Simon Wright
2021-04-20 19:17 ` Randy Brukardt
2021-04-20 20:04 ` Simon Wright
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