kalvn<p>✨ Nouveau post : </p><p>L'essentiel sur les expressions régulières en JavaScript</p><p><a href="https://kalvn.net/blog/l-essentiel-sur-les-expressions-regulieres-en-javascript/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">kalvn.net/blog/l-essentiel-sur</span><span class="invisible">-les-expressions-regulieres-en-javascript/</span></a></p><p><a href="https://mastodon.xyz/tags/JavaScript" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>JavaScript</span></a> <a href="https://mastodon.xyz/tags/RegExp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RegExp</span></a> <a href="https://mastodon.xyz/tags/regex" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>regex</span></a></p>
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++) 
Un outil de remplacement de texte qui semble avoir une ergonomie un peu plus confortable que sed https://github.com/c0stya/trre #commandline #regexp #opensource
GitHubGitHub - c0stya/trre: Transductive regular expressionsTransductive regular expressions. Contribute to c0stya/trre development by creating an account on GitHub.
The {rematch2} #RStats 
is a “small wrapper on regular expression matching functions regexpr and gregexpr to return the results in tidy data frames.” By @gaborcsardi . On CRAN.
https://github.com/r-lib/rematch2#readme
#RegExp #RegEx
GitHubGitHub - r-lib/rematch2: Tidy output from regular expression matchesTidy output from regular expression matches. Contribute to r-lib/rematch2 development by creating an account on GitHub.
New at PragProg
Staffan Nöteberg helps you really understand how the machinery works under the hood. Learn advanced tools like reluctant, lookbehind and nondeterministic finite automata to write efficient and elegant regexes with ease.
In this illustrated guide, you gain precisely that understanding., even with no prior knowledge of Regular Expressions.
Suite du fil
Another resource for regular expressions in R: A Shiny app by Adam Spannbauer
App: https://spannbaueradam.shinyapps.io/r_regex_tester/
Blog post: https://adamspannbauer.github.io/2018/01/16/r-regex-tester-shiny-app/
Need help with regular expressions in R? Check out the RegExplain RStudio add-in by @grrrck
https://www.garrickadenbuie.com/project/regexplain/
Garrick Aden-Buie🕵️♂️ RegExplain – Garrick Aden-BuieAn RStudio addin slash utility belt for regular expressions
https://gugod.org/2024/11/regexp-digits/
如果你在用正規表示式的 \d 在驗證來自使用者的輸入的話，你得再想想。
gugod.org能抓出「數字」的正規表示式
Suite du fil
A website to write, test, and share regular expressions!
(I think this is pretty well-known, actually...)regex101regex101: build, test, and debug regexRegular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
Updated version of my ideas for improving the JavaScript RegExp API: https://gist.github.com/rauschma/8db338a96f9ead8df0714d233e81fed4
Giststateless-regexp-methods.mdGitHub Gist: instantly share code, notes, and snippets.
A répondu dans un fil de discussion
@tripleo You’re thinking of #Perl’s “taint mode” (stop your teenage giggling), where outside data is untrusted unless it’s the extracted subpattern match in a #RegularExpression.
It’s only enabled under certain conditions. Read about it in the `perlsec` manual page: https://perldoc.perl.org/perlsec#Taint-mode
perldoc.perl.orgperlsec - Perl security - Perldoc Browser
I see a lot of unnecessarily specific regexs (typically excessive captures & pointless `.*$`) being used. Logic says they'll be slower so I spent about 90 seconds testing an example on 3 in-browser JS benchmark apps.
Comparing:
`/^(Hello), this is a string (.*)$/` to
`/^Hello, this is a string /`
the latter is 1.5-5x faster on all 3 apps.
#RegEx #RegExp #RegularExpression
Une idée incroyable : au lieu d'interpréter le pattern d'une expression régulière à l'exécution, cette librairie crée une classe Java exécutant le pattern au moment du build. Ca optimise considérablement l'exécution du code, évidement. Par contre, je ne vois pas (encore) comment intégrer ça dans un projet "classique" : pas de plugin maven ou de configuration de compilateur. Il y a donc … https://github.com/hyperpape/needle #java #regexp #library #optimisation #compilation #opensource
GitHubGitHub - hyperpape/needle: Compiling string matching algorithms and regular expressions to java bytecodeCompiling string matching algorithms and regular expressions to java bytecode - hyperpape/needle
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Une belle histoire d'expression régulière sur un sujet en apparence simple, mais aux conséquences désastreuses pour les performances. Ce qui est drôle, c'est que la bonne solution, c'est peut-être bien de passer par un parser XML qui éliminera correctement les commentaires. https://regexide.com/ #javascript #regexp #performance #algorithme #design
regexide.comRegexide
To my fellow #ActuallyAutistics who are also into programming. Can you handle #RegEx / #RegExp?
Up to how much complexity?
When I was younger, it was easy. Today, I have to use a test tool! ^_^;;
#Autistics #Autism #ActuallyAutistic #Autistic #AutismSpectrum #AskingAutistics
In JavaScript the "empty" regular expression literal is written `/(?:)/` since the parser would erroneously take `//` as the start of a single-line comment
https://www.ecma-international.org/ecma-262/5.1/#sec-7.8.5
#JavaScript #ECMA #Empty #RegExp