Re: hex dump w/ or w/out utf-8 chars

References	(3 earlier) <a3a4aa9b-3a5c-42cd-9a04-4c02f962b71e@googlegroups.com> <mailman.4585.1373549528.3114.python-list@python.org> <26d5c832-eaa1-439e-af61-e2855af2cd18@googlegroups.com> <mailman.4619.1373613834.3114.python-list@python.org> <2165f7cc-b9bf-41b1-b128-d33b522046dc@googlegroups.com>
Date	2013-07-13 19:46 +1000
Subject	Re: hex dump w/ or w/out utf-8 chars
From	Chris Angelico <rosuav@gmail.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.4676.1373708809.3114.python-list@python.org> (permalink)

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On Sat, Jul 13, 2013 at 5:56 PM,  <wxjmfauth@gmail.com> wrote:
> Try to write an editor, a text widget, with with a coding
> scheme like the Flexible String Represenation. You will
> quickly notice, it is impossible (understand correctly).
> (You do not need a computer, just a sheet of paper and a pencil)
> Hint: what is the character at the caret position?

I would use an internal representation that allows insertion and
deletion - in its simplest form, a list of strings. And those strings
would be whatever I can most conveniently work with.

I've never built a text editor widget, because my libraries always
provide them. But there is a rough parallel in the display storage for
Gypsum, which stores a series of lines, each of which is a series of
sections in different colors. (A line might be a single section, ie
one color for its whole length.) I store them in arrays of (color,
string, color, string, color, string...). The strings I use are in the
format wanted by my display subsystem - which in my case is the native
string type of the language, which... oh, what a pity for jmf, is a
flexible object that uses 8, 16, or 32 bits for each character.

ChrisA

Thread

hex dump w/ or w/out utf-8 chars blatt <ferdy.blatsco@gmail.com> - 2013-07-07 17:22 -0700
  Re: hex dump w/ or w/out utf-8 chars Chris Angelico <rosuav@gmail.com> - 2013-07-08 11:17 +1000
  Re: hex dump w/ or w/out utf-8 chars Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-08 05:48 +0000
  Re: hex dump w/ or w/out utf-8 chars ferdy.blatsco@gmail.com - 2013-07-08 10:31 -0700
    Re: hex dump w/ or w/out utf-8 chars Chris Angelico <rosuav@gmail.com> - 2013-07-09 03:52 +1000
      Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-11 06:18 -0700
        Re: hex dump w/ or w/out utf-8 chars Chris Angelico <rosuav@gmail.com> - 2013-07-11 23:32 +1000
          Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-11 11:42 -0700
            Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-11 11:44 -0700
            Re: hex dump w/ or w/out utf-8 chars Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-12 03:18 +0000
              Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-12 14:42 -0700
            Re: hex dump w/ or w/out utf-8 chars Chris Angelico <rosuav@gmail.com> - 2013-07-12 12:16 +1000
              Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-13 00:56 -0700
                Re: hex dump w/ or w/out utf-8 chars Lele Gaifax <lele@metapensiero.it> - 2013-07-13 10:24 +0200
                Re: hex dump w/ or w/out utf-8 chars Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-13 09:36 +0000
                Re: hex dump w/ or w/out utf-8 chars Chris Angelico <rosuav@gmail.com> - 2013-07-13 19:46 +1000
                Re: hex dump w/ or w/out utf-8 chars Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-13 09:49 +0000
                Re: hex dump w/ or w/out utf-8 chars Chris Angelico <rosuav@gmail.com> - 2013-07-13 20:09 +1000
                Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-13 07:37 -0700
                Re: hex dump w/ or w/out utf-8 chars Dave Angel <davea@davea.name> - 2013-07-13 15:02 -0400
                Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-14 01:20 -0700
                Re: hex dump w/ or w/out utf-8 chars Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-14 10:44 +0000
                Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-14 06:44 -0700
                Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-24 06:28 -0700
                Re: hex dump w/ or w/out utf-8 chars Neil Hodgson <nhodgson@iinet.net.au> - 2013-07-14 09:17 +1000
  Re: hex dump w/ or w/out utf-8 chars ferdy.blatsco@gmail.com - 2013-07-08 10:53 -0700
    Re: hex dump w/ or w/out utf-8 chars Chris Angelico <rosuav@gmail.com> - 2013-07-09 04:07 +1000
    Re: hex dump w/ or w/out utf-8 chars Dave Angel <davea@davea.name> - 2013-07-08 16:56 -0400
      Re: hex dump w/ or w/out utf-8 chars Neil Cerutti <neilc@norwich.edu> - 2013-07-09 12:22 +0000
        Re: hex dump w/ or w/out utf-8 chars Dave Angel <davea@davea.name> - 2013-07-09 08:54 -0400
          Re: hex dump w/ or w/out utf-8 chars Neil Cerutti <neilc@norwich.edu> - 2013-07-09 13:00 +0000
            Re: hex dump w/ or w/out utf-8 chars Skip Montanaro <skip@pobox.com> - 2013-07-09 08:18 -0500
            Re: hex dump w/ or w/out utf-8 chars Dave Angel <davea@davea.name> - 2013-07-09 09:23 -0400
    Re: hex dump w/ or w/out utf-8 chars MRAB <python@mrabarnett.plus.com> - 2013-07-08 22:38 +0100
    Re: hex dump w/ or w/out utf-8 chars Chris Angelico <rosuav@gmail.com> - 2013-07-09 07:49 +1000
      Re: hex dump w/ or w/out utf-8 chars Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-09 06:53 +0000
    Re: hex dump w/ or w/out utf-8 chars Joshua Landau <joshua.landau.ws@gmail.com> - 2013-07-08 23:02 +0100
    Re: hex dump w/ or w/out utf-8 chars Dave Angel <davea@davea.name> - 2013-07-08 18:45 -0400
    Re: hex dump w/ or w/out utf-8 chars Chris Angelico <rosuav@gmail.com> - 2013-07-09 08:51 +1000
    Re: hex dump w/ or w/out utf-8 chars MRAB <python@mrabarnett.plus.com> - 2013-07-09 00:32 +0100
      Re: hex dump w/ or w/out utf-8 chars Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-09 06:46 +0000
    Re: hex dump w/ or w/out utf-8 chars Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-09 07:00 +0000
      Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-09 02:34 -0700
        Re: hex dump w/ or w/out utf-8 chars Chris “Kwpolska” Warrick <kwpolska@gmail.com> - 2013-07-09 12:15 +0200
          Re: hex dump w/ or w/out utf-8 chars Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-09 16:32 +0000
            Re: hex dump w/ or w/out utf-8 chars wxjmfauth@gmail.com - 2013-07-10 01:52 -0700
        Re: hex dump w/ or w/out utf-8 chars Joshua Landau <joshua@landau.ws> - 2013-07-12 23:01 +0100
          Re: hex dump w/ or w/out utf-8 chars Tim Roberts <timr@probo.com> - 2013-07-12 20:42 -0700
          Re: hex dump w/ or w/out utf-8 chars Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-13 04:51 +0000

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