Adding lookbehinds to rust-lang/regex, https://systemf.epfl.ch/blog/rust-regex-lookbehinds/.

The feature of lookbehinds is very often absent in linear regex engines. These researchers bring them in the `regex` crate. The benchmarks show a reasonable and usable performance making it ready for real-world applications.

The article gives all pointers to the research article and the patches for `regex` (on github.com).

The prevention of unnecessary lookbehind scanning till the end of the haystack is neat!

I love Vim, but of the handful of things that bothers me about it is that its #regex engine requires you to escape capture groups and character count atoms. There's always \v but it's honestly kind of annoying to have to think about picking the right one lol.

#Vim is great, but mother Perl did that part better

Apropos of last weekends #emacs hacking. How many times would you ask an #llm to generate a #regex for you before you give up and just use a #rx form?

Oh, joy! Another riveting tale of #regex gymnastics: let's dive deep into the thrilling world of "captureless lookbehinds" in #Rust and pretend anyone else cares. Apparently, watching paint dry wasn't exciting enough, so now we're all experts in #linear-time regex #algorithms.
https://systemf.epfl.ch/blog/rust-regex-lookbehinds/ #captureless #lookbehinds #coding #humor #HackerNews #ngated

Adding lookbehinds to rust-lang/regex

https://systemf.epfl.ch/blog/rust-regex-lookbehinds/

TIL: in Python's `re` module, a named group (like `(?P<name>...)` can have `_` in the name, but not `-`, because they need to be valid Python identifiers instead of just strings.

I've only been using regular expressions in Python since 1.x.

Using Regular Expressions (Regex) in SQL Server 2025: A Complete Guide. buff.ly/9aghJ03 #regex #sqlserver #database #sql #regularexpressions

Using Regular Expressions (Reg...

Using Regular Expressions (Regex) in SQL Server 2025: A Complete Guide.

https://www.red-gate.com/simple-talk/featured/using-regex-in-sql-server-2025-complete-guide/

Trying to craft regex rules that match linguistic sound changes (https://en.wikipedia.org/wiki/Sound_change).

Fun! NOT!

How to Master Regular Expressions for Frontend Development https://jsdev.space/howto/regex-guide-frontend/ #javascript #regex

PSA:
Tired of your timeline getting full of people debating the merits of #AI & #LLMs?

Add the following #regex to your word mutes:
/\s.*LLM*./i

Now my timeline isn't full of the continuing debate as to whether an #LLM is good or not.

(Hint: You can do the same thing for "AI" too!)

Regular Expression Chess

[Nicholas Carlini] found some extra time on his hands over the last holiday, so he decide to do something with “entirely no purpose.” The result: 84,688 regular expressions that can play chess using a 2-ply minmax strategy. No kidding. I think we can do some heavy-duty regular expressions, but this is a whole other level.

https://nicholas.carlini.com/writing/2025/regex-chess.html

#Regex doesn’t have to be scary. At #PSConfEU 2025, @james-oneill.bsky.social broke it down with: Match, replace, split Greedy vs lazy Real-world regex tips in #PowerShell & VS Code Early bird 2026 → psconf.eu #TextParsing #VSCode

- YouTube

I wanted to append a prefix to the beginning of the contents of a bunch of cells in #LibreOffice Calc, and the "simplest" way I found to do that today (from what I saw as recommendations in forums like StackOverflow and Reddit)… was to use regexes

So, to prefix the contents, I searched for:
^(.)

…and replaced by:
The string you want to add as a prefix $1

I feel dirty.

Finally got my head around #regex enough to fine tune my #searxng instance to stop showing me results for Perth,AU instead of results for #PerthKinross. #selfhosting

There are 3 people in the world who truly understand #regex

One who implemented it for Python
One who implemented it for Java(script)

The third one is an off-by-one error

@brad_frost ranted on LinkedIn on Regex and AI and a comment by a follower made my day:

> Regex is the Comic Sans of logic. it shows up, ruins everything, and somehow still gets used.

Muss ich jetzt wirklich so was hier benutzen?

.*[Ss][Ee][Ll][Ee][Cc][Tt].*[Ff][Rr][Oo][Mm]

Loving the power of occur in #Emacs, specifically multi-occur-in-matching-buffers in my case, for finding and listing in a single buffer all #regex matches from regex-filtered buffers. Searching across .csv terminology files this way gives me a buffer of search results, each line of which takes me to the line of the source file where the occurrence appears. Extremely useful in #translation work for searching across terminology dictionaries I've created in the past. Discovered via Mickey Petersen's Mastering Emacs. https://www.masteringemacs.org/article/searching-buffers-occur-mode