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Re: case-insensitive string comparison
From: |
Roland Winkler |
Subject: |
Re: case-insensitive string comparison |
Date: |
Wed, 20 Jul 2022 11:24:38 -0500 |
On Tue, Jul 19 2022, Stefan Monnier wrote:
>> PS. Actually, compare-strings/ignore_case is broken because it does,
>> essentially, upcase both arguments, see
>> https://stackoverflow.com/q/319426/850781
>
> Hmm... `string-collate-equalp`?
It would be nice if the node in the elisp manual on "comparison of
characters and strings" included some discussion on what usage cases
with case-folding can / should preferentially be covered by the
locale-dependent function string-collate-equalp versus something like
compare-strings.
In my narrow world, I can think of two extremes:
- bibtex-mode needs to compare BibTeX keywords that are ascii strings
for which case is insignificant. So bibtex-string= is exactly what
Sam suggests to put into subr.el, and I believe that's good enough
(just as almost any other approach I can think of for this particular
problem).
- BBDB needs to know whether a name is already present in the database
or not, ignoring case. The function bbdb-string= is again what Sam
suggests to put into subr.el. The function string-collate-equalp
might be better suited for this. But which locale should it use? The
records in my BBDB cover larger parts of the world and I do not even
know which locale(s) might work best for each of them, not to mention
that BBDB needs to loop over all records. Is there a "univeral
default locale"?
- Re: case-insensitive string comparison, (continued)
- Re: case-insensitive string comparison, Robert Pluim, 2022/07/26
- Re: case-insensitive string comparison, Bruno Haible, 2022/07/25
- Re: case-insensitive string comparison, Richard Stallman, 2022/07/25
- Re: case-insensitive string comparison, Helmut Eller, 2022/07/26
- Re: case-insensitive string comparison, Eli Zaretskii, 2022/07/26
- Re: case-insensitive string comparison, Sam Steingold, 2022/07/26
- Re: case-insensitive string comparison, Sam Steingold, 2022/07/26
- Re: case-insensitive string comparison, Eli Zaretskii, 2022/07/26
- Re: case-insensitive string comparison, Bruno Haible, 2022/07/26
- Re: case-insensitive string comparison, Eli Zaretskii, 2022/07/26
- Re: case-insensitive string comparison,
Roland Winkler <=
- Re: case-insensitive string comparison, Sam Steingold, 2022/07/20
- Re: case-insensitive string comparison, Eli Zaretskii, 2022/07/20
- Re: case-insensitive string comparison, Eli Zaretskii, 2022/07/20
- Re: case-insensitive string comparison, Roland Winkler, 2022/07/20
- Re: case-insensitive string comparison, Eli Zaretskii, 2022/07/20
- Re: case-insensitive string comparison, Roland Winkler, 2022/07/20
- Re: case-insensitive string comparison, Eli Zaretskii, 2022/07/20
- RE: [External] : Re: case-insensitive string comparison, Drew Adams, 2022/07/20
- Re: case-insensitive string comparison, Eli Zaretskii, 2022/07/21
- Re: case-insensitive string comparison, Roland Winkler, 2022/07/21