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Mehrad :kde: :emacs: :rstats:My PhD student was still feeling uncomfortable with <a href="https://fosstodon.org/tags/regex" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#regex</a>, so I searched and found these awesome regex games that can help you improve your regex-fu and help you have some fun during your daily commute:<a href="https://regexcrossword.com" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://regexcrossword.com</a><a href="https://www.the-regex-game.com/?level=integer" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.the-regex-game.com/?level=integer</a>and this imho is more geared towards beginners:<a href="https://regexone.com" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://regexone.com</a><a href="https://fosstodon.org/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a>

AlThings I Learned Today <a href="https://mastodon.sdf.org/tags/TILT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#TILT</a> <a href="https://mastodon.sdf.org/tags/bash" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#bash</a> <a href="https://mastodon.sdf.org/tags/linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#linux</a> Still working on <a href="https://mastodon.sdf.org/tags/regularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#regularExpression</a> in bash.re='^~\s~\s~' if [[ "${lineN}" =~ ${re} ]] ; then bla bla bla...The extra variable declaration is needed; found on web "While not always necessary, it is advisable to store the regex in a variable first, because Bash has trouble with regex literals containing \."

AlThings I Learned Today <a href="https://mastodon.sdf.org/tags/TILT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#TILT</a> <a href="https://mastodon.sdf.org/tags/bash" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#bash</a> <a href="https://mastodon.sdf.org/tags/linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#linux</a> It took me while to figure this out and now I remember that I fell in this hole before.When using <a href="https://mastodon.sdf.org/tags/regularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#regularExpression</a> like:if [[ ! ${suffix} =~ .*voScript.txt$ ]] ; then echo "something" ;fido NOT quote the regular expression. It is not a string.

IT NewsHackaday Links: August 11, 2024 - “Please say it wasn’t a regex, please say it wasn’t a regex; aww, crap, it was a r... - <a href="https://hackaday.com/2024/08/11/hackaday-links-august-11-2024/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://hackaday.com/2024/08/11/hackaday-links-august-11-2024/</a> <a href="https://schleuss.online/tags/regularexpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#regularexpression</a> <a href="https://schleuss.online/tags/hackadaycolumns" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#hackadaycolumns</a> <a href="https://schleuss.online/tags/hackadaylinks" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#hackadaylinks</a> <a href="https://schleuss.online/tags/wiringharness" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#wiringharness</a> <a href="https://schleuss.online/tags/crowdstrike" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#crowdstrike</a> <a href="https://schleuss.online/tags/bassinette" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#bassinette</a> <a href="https://schleuss.online/tags/lithiumion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#lithiumion</a> <a href="https://schleuss.online/tags/rootcause" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#rootcause</a> <a href="https://schleuss.online/tags/bricking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#bricking</a> <a href="https://schleuss.online/tags/wildcard" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#wildcard</a> <a href="https://schleuss.online/tags/paywall" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#paywall</a> <a href="https://schleuss.online/tags/doggo" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#doggo</a> <a href="https://schleuss.online/tags/pylon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#pylon</a> <a href="https://schleuss.online/tags/regex" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#regex</a> <a href="https://schleuss.online/tags/tower" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tower</a> <a href="https://schleuss.online/tags/fire" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#fire</a> <a href="https://schleuss.online/tags/grid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#grid</a> <a href="https://schleuss.online/tags/iot" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#iot</a>

Neil CraigI 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. <a href="https://mastodon.social/tags/RegEx" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegEx</a> <a href="https://mastodon.social/tags/RegExp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegExp</a> <a href="https://mastodon.social/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a>

IT NewsGalvanize Your Grip On Grep With This Great Grep Guide - These days, you can’t throw a USB stick without hitting something that’s running L... - <a href="https://hackaday.com/2024/03/26/galvanize-your-grip-on-grep-with-this-great-grep-guide/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://hackaday.com/2024/03/26/galvanize-your-grip-on-grep-with-this-great-grep-guide/</a> <a href="https://schleuss.online/tags/softwaredevelopment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#softwaredevelopment</a> <a href="https://schleuss.online/tags/regularexpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#regularexpression</a> <a href="https://schleuss.online/tags/tutorial" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tutorial</a> <a href="https://schleuss.online/tags/linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#linux</a> <a href="https://schleuss.online/tags/regex" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#regex</a> <a href="https://schleuss.online/tags/news" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#news</a> <a href="https://schleuss.online/tags/grep" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#grep</a> <a href="https://schleuss.online/tags/unix" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#unix</a>

unixbhaskarEmacs Regex <a href="https://unixbhaskar.wordpress.com/2024/02/21/emacs-regex/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://unixbhaskar.wordpress.com/2024/02/21/emacs-regex/</a> <a href="https://mastodon.social/tags/TechnicalEmacsEditorOpensourceRegexTools" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#TechnicalEmacsEditorOpensourceRegexTools</a><a href="https://mastodon.social/tags/emacs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#emacs</a> <a href="https://mastodon.social/tags/linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#linux</a> <a href="https://mastodon.social/tags/gnu" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#gnu</a> <a href="https://mastodon.social/tags/opensource" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#opensource</a> <a href="https://mastodon.social/tags/regularexpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#regularexpression</a>

ℵancymI just published “Hugo Regular Expressions (featuring ignoreFiles)” at <a href="https://www.ii.com/hugo-regular-expressions-ignorefiles/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.ii.com/hugo-regular-expressions-ignorefiles/</a> <a href="https://mathstodon.xyz/tags/InfiniteInk" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#InfiniteInk</a> <a href="https://mathstodon.xyz/tags/GoHugo" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GoHugo</a> <a href="https://mathstodon.xyz/tags/Hugo" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Hugo</a> <a href="https://mathstodon.xyz/tags/ignoreFiles" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ignoreFiles</a> <a href="https://mathstodon.xyz/tags/RE2" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RE2</a> <a href="https://mathstodon.xyz/tags/RegEx" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegEx</a> <a href="https://mathstodon.xyz/tags/RegExp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegExp</a> <a href="https://mathstodon.xyz/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a> <a href="https://mathstodon.xyz/tags/RegularExpressions" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpressions</a> <a href="https://mathstodon.xyz/tags/ReplaceRE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ReplaceRE</a> <a href="https://mathstodon.xyz/tags/Tech" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Tech</a> <a href="https://mathstodon.xyz/tags/By%E2%84%B5" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Byℵ</a> <a href="https://mathstodon.xyz/tags/ByNM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ByNM</a>

Ed SuominenIt is a known fact that the magic of a <a href="https://hachyderm.io/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a> degrades with each word of comment you explain it with. Wizardry is achieved when your regex has to be broken up into multiple lines of, say, <a href="https://hachyderm.io/tags/Python" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Python</a>, uses nested parentheses, line beginning or ending operators ^ and $, and gets assigned to an inscrutable variable name.These are secrets jealously guarded by The Old Man <a href="https://hachyderm.io/tags/Programming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Programming</a> Guild./s

Mark Gardner<a href="https://mastodon.social/@regehr" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@regehr</a> <a href="https://discuss.systems/@commodore" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@commodore</a> <a href="https://discuss.systems/@dev" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@dev</a> There is even a (low-severity, a/k/a “cruel”) <a href="https://social.sdf.org/tags/PerlCritic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PerlCritic</a> policy to discourage everything but $_, @_, $], and numbered <a href="https://social.sdf.org/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a> capture variables: <a href="https://metacpan.org/pod/Perl::Critic::Policy::Variables::ProhibitPunctuationVars" rel="nofollow noopener noreferrer" target="_blank">https://metacpan.org/pod/Perl::Critic::Policy::Variables::ProhibitPunctuationVars</a><a href="https://metacpan.org/pod/Perl::Critic::Policy::Variables::ProhibitMatchVars" rel="nofollow noopener noreferrer" target="_blank">https://metacpan.org/pod/Perl::Critic::Policy::Variables::ProhibitMatchVars</a> already protects you against the performance-sapping $`, $&, and $' match variablesAnd you can configure your own prohibited list with <a href="https://metacpan.org/pod/Perl::Critic::Policy::Variables::ProhibitEvilVariables" rel="nofollow noopener noreferrer" target="_blank">https://metacpan.org/pod/Perl::Critic::Policy::Variables::ProhibitEvilVariables</a><a href="https://social.sdf.org/tags/Perl" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Perl</a> <a href="https://social.sdf.org/tags/RegEx" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegEx</a> <a href="https://social.sdf.org/tags/RegExp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegExp</a> <a href="https://social.sdf.org/tags/RegExes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegExes</a> <a href="https://social.sdf.org/tags/RegExps" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegExps</a>

Mark Gardner<a href="https://chirp.social/@Perl" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@Perl</a> Here's the same one-liner with the <a href="https://social.sdf.org/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a> removed and using verbose "English" special variables, for those <a href="https://social.sdf.org/tags/Perl" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Perl</a> haters who think that such things are line noise. It adds 94 characters!% perl -MEnglish -nE '$count++ if "@" eq substr $ARG, 0, 1 and not $INPUT_LINE_NUMBER % 2; END {say "$INPUT_LINE_NUMBER lines, $count users"; say "missing ", ($INPUT_LINE_NUMBER / 2) - $count if $INPUT_LINE_NUMBER / $count != 2}' 'Perl Twitter community members.txt' 376 lines, 188 users

Jim Donegan 🎵 ✅<a href="https://mastodon.scot/tags/BrianKernighan" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#BrianKernighan</a> - Where <a href="https://mastodon.scot/tags/GREP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GREP</a> Came From - <a href="https://mastodon.scot/tags/Computerphile" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Computerphile</a> "Commonly used grep was written overnight, but why and how did it get its name?"<a href="https://www.youtube.com/watch?v=NTfOnGZUZDk&ab_channel=Computerphile" rel="nofollow noopener noreferrer" target="_blank">https://www.youtube.com/watch?v=NTfOnGZUZDk&ab_channel=Computerphile</a> <a href="https://mastodon.scot/tags/BellLabs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#BellLabs</a> <a href="https://mastodon.scot/tags/Bell" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Bell</a> <a href="https://mastodon.scot/tags/Programming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Programming</a> <a href="https://mastodon.scot/tags/UNIX" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#UNIX</a> <a href="https://mastodon.scot/tags/Linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Linux</a> <a href="https://mastodon.scot/tags/Pipeline" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Pipeline</a> <a href="https://mastodon.scot/tags/PipelineProgramming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PipelineProgramming</a> <a href="https://mastodon.scot/tags/InputOutput" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#InputOutput</a> <a href="https://mastodon.scot/tags/ED" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ED</a> <a href="https://mastodon.scot/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a> <a href="https://mastodon.scot/tags/RegularExpressions" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpressions</a>

Mark Gardner<a href="https://mastodon.social/@ChristosArgyrop" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@ChristosArgyrop</a> <a href="https://chirp.social/@Perl" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@Perl</a> The hash lookup in that article’s second example says it’s mainly useful for exact string matching. The `for` topicalizer pattern is still good for arbitrary conditions like the <a href="https://social.sdf.org/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a> matches I list, but it could just as easily use `isa` for class matching, or whatever.

Benny Powers 🇨🇦️🇮🇱️Slides from the talk I gave today about <a href="https://social.bennypowers.dev/tags/neovim" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#neovim</a> <a href="https://social.bennypowers.dev/tags/nvim" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#nvim</a> <a href="https://social.bennypowers.dev/tags/regularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#regularExpression</a> <a href="https://social.bennypowers.dev/tags/regex" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#regex</a> plugin `nvim-regexplainer`:<a href="https://bennypowers.dev/decks/nvim-regexplainer" rel="nofollow noopener noreferrer" target="_blank">https://bennypowers.dev/decks/nvim-regexplainer</a>

Akib Azmain Turja<a href="https://hostux.social/tags/EmacsTip" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#EmacsTip</a>: It is always better to use <a href="https://hostux.social/tags/Rx" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Rx</a> instead of raw <a href="https://hostux.social/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a>, because they are error-prone, especially the escapes. But if you need to use raw <a href="https://hostux.social/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a>, install <a href="https://hostux.social/tags/Relint" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Relint</a>, a <a href="https://hostux.social/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a> linter for <a href="https://hostux.social/tags/EmacsLisp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#EmacsLisp</a>. Just run relint-current-buffer in your buffer, it will find most of your <a href="https://hostux.social/tags/Regex" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Regex</a> bugs.<a href="https://github.com/mattiase/relint" rel="nofollow noopener noreferrer" target="_blank">https://github.com/mattiase/relint</a><a href="https://hostux.social/tags/Emacs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Emacs</a> <a href="https://hostux.social/tags/Relint" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Relint</a> <a href="https://hostux.social/tags/RegularExpression" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RegularExpression</a> <a href="https://hostux.social/tags/Regex" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Regex</a> <a href="https://hostux.social/tags/Regexp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Regexp</a>

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