These are the factoids for <freenode.net:#regex>.
| factoid_id | subject | copula | predicate | history | from namespace |
|---|---|---|---|---|---|
| 14914 | is | <echo> |
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| 14978 | 8ball | is | <8ball <arg>> Most likely |
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| 13749 | api | is | https://github.com/firasdib/Regex101/wiki/API | revisions | |
| 15760 | ask | is | Don't ask for permission to ask a question. Don't ask if anyone is here. Just ask your question. | revisions | |
| 15561 | awk | is | https://docs.google.com/presentation/d/1l9S_6QB8ES5vrp573Ms578qhSEC0xE_xjazJKNyHoSI | revisions | |
| 11782 | a-z | is | /[A-z]/ does not mean what you might think. You should use /[A-Za-z]/ or /[a-z]/i, unless you wish to include these characters: [ \ ] ^ _ ` | revisions | |
| 14848 | b | is | <echo> |
revisions | |
| 14305 | babewatch | is | With (?=babe) you'll only see them when they're directly in front of you, with (?=.*babe) you'll see them even when they're far away, and with (?<=babe) you'll see them when they're directly behind you. | revisions | |
| 15519 | balancing-group | is | https://docs.microsoft.com/en-us/dotnet/standard/base-types/grouping-constructs-in-regular-expressions#balancing_group_definition | revisions | |
| 15672 | bash | is | <basheval <arg>> hello jackie↵hello henry↵hello peter↵hello barbara↵ |
revisions | |
| 15170 | be | is | [eval $str="[fact [8ball [fact _be__get_list [arg]]]]"; $arg=[quote d [arg]]; if ($arg =~ /^\s*a\s+retard\s*$/) {$arg=[arg &n]}; if ($arg =~ /^\s*$/) {$str} else {"<".$arg."> ".$str}] <Just don't be a retard> How do I parse HTML with regex? |
revisions | |
| 15169 | _be__default | is | _be_noob or _be_noob | revisions | |
| 15171 | _be__get_list | is | `eval use JSON::MaybeXS qw/decode_json/; $bel= decode_json `quote d `fact factgrep ^_be_`arg!!!; return `quote d `fact _be__default!! unless (@$bel); @$bel = (@$bel, @$bel); join(', ', @$bel) =~ s/,/ or /r! _be_noob or _be_noob |
revisions | |
| 15173 | _be_noob | is | How do I parse HTML with regex? | revisions | |
| 12133 | blog | is | https://firasdib.com/blog/ | revisions | |
| 16087 | bottom | is | <karmatop -<arg>> usage is: top/bottom \d+ karma |
revisions | |
| 15385 | bre | is | POSIX: https://www.regular-expressions.info/posix.html, GNU: https://www.regular-expressions.info/gnu.html | revisions | |
| 15742 | bruh | is | testuser | revisions | |
| 15754 | bruhbot | is | perlbot | revisions | |
| 15775 | bugs | is | Just because nobody complains, doesn't mean all parachutes are perfect. | revisions | |
| 16056 | c_comments | is | To match '//...' line comments and '/.../' block comments, see: regex101.com/r/41Qebw/28 | revisions | |
| 13802 | code | is | <fact codegen> Select code generator on the left side of regex101 to view sample code for your language of choice. |
revisions | |
| 15275 | codegen | is | Select code generator on the left side of regex101 to view sample code for your language of choice. | revisions | |
| 15993 | compare | is | https://en.wikipedia.org/wiki/Comparison_of_regular_expression_engines | revisions | |
| 16039 | crlf | is | (?:\r?\n) can be used to match both Windows and Linux line endings | revisions | |
| 15956 | csv | is | Care should be used when splitting/parsing CSV (comma-separated) and TSV (tab-separated) files; fields may include "double quotes" where a "" pair of double quotes within are used to represent a double-quote literal. | revisions | |
| 16027 | date | is | never got added | revisions | |
| 14624 | davidebyzero | is | not even hard | revisions | |
| 16172 | debug | is | <fact debugger> Select regex debugger on the left side of https://regex101.com/ (PCRE mode only) to see the step-by-step process of your regex being matched against your data. |
revisions | |
| 16173 | debugger | is | Select regex debugger on the left side of https://regex101.com/ (PCRE mode only) to see the step-by-step process of your regex being matched against your data. | revisions | |
| 12238 | digitok | is | (*F) | revisions | |
| 16114 | discord | is | Join us in the RegEx101 Discord! https://discord.gg/wUA6F6YqSs | revisions | |
| 14854 | do | is | <echo> |
revisions | |
| 12594 | doqnach | is | Do you really need regex for that? | revisions | |
| 14856 | dv | is | <echo> |
revisions | |
| 15772 | eg | is | Please provide full, real-world examples. If you're too busy to provide good examples, we're too busy to help. | revisions | |
| 16101 | eggdrop | is | Eggdrop (https://docs.eggheads.org) regex uses Tcl notation (see !tcl) for its regular expressions: https://www.tcl-lang.org/man/tcl/TclCmd/regexp.html | revisions | |
| 15403 | is | http://www.regular-expressions.info/email.html, https://emailregex.com/, https://regex101.com/library?orderBy=MOST_POINTS&search=email | revisions | ||
| 12339 | enter | is | Do not use the Enter key as punctuation. Think in complete thoughts, then type. | revisions | |
| 15386 | ere | is | <fact bre> POSIX: https://www.regular-expressions.info/posix.html, GNU: https://www.regular-expressions.info/gnu.html |
revisions | |
| 11698 | eval | is | <eval <arg>> Number found where operator expected (Missing operator before "10.0.0.1"?) at (IRC) line 1, near "'%s\n' 10.0.0.1" ERROR: syntax error at (IRC) line 1, near "'%s\n' 10.0.0.1" Execution of (IRC) aborted due to compilation errors. |
revisions | |
| 15017 | factoidsurl | is | `eval use URI::Encode; sub e{URI::Encode::uri_encode$_[0],{encode_reserved=>1}}; $_=`quote d `arg &s!:`arg &c!!; m|^.*?([^.]+\.[^.]+):(.*?)$|; sprintf "https://factoids.perl.bot/%s/%s/list", e($1), e($2)! https://factoids.perl.bot/libera.chat/%23regex/list |
revisions | |
| 15781 | fake | is | If you provide fake or incomplete sample text, we'll only be able to provide fake and incomplete regex solutions. | revisions | |
| 16195 | flavor | is | Which regex tool/engine/flavor are you using? Not all implementations have the same features: what works on regex101 may not work for you. | revisions | |
| 15766 | forgot | is | I forgor ð | revisions | |
| 16160 | "future date validation"? i.e. trying to use regex to verify that a given date | is | in the future, not the present or past? | revisions | |
| 15480 | games | is | Quiz: https://regex101.com/quiz | Crossword: https://regexcrossword.com/ | Crossword 2: https://jimbly.github.io/regex-crossword/ | Golf: https://alf.nu/RegexGolf | Regex Tuesday: https://callumacrae.github.io/regex-tuesday/ | Regex Koans: https://github.com/frenchroasted/RegexKoans | HackerRank: https://www.hackerrank.com/domains/regex (+code) | revisions | |
| 14910 | _getarg_perl_array | is | `eval use Text::ParseWords; my @words = shellwords(`quote d `arg!!); \@words! ["-s","##NULL source","source"] |
revisions | |
| 15784 | git | is | <fact github> Not Available |
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| 15783 | github | is | https://github.com/firasdib/Regex101 | revisions | |
| 15782 | go|dfish | is | <go|dfish> you could just pretend basic doesn't exist, it's better that way | revisions | |
| 14677 | group | is | <fact groups> Use a (capturing group) if you need to capture a substring. Use a (?:non-capturing group) if you need the functionality of a group, but no capture is required. |
revisions | |
| 14675 | groups | is | Use a (capturing group) if you need to capture a substring. Use a (?:non-capturing group) if you need the functionality of a group, but no capture is required. | revisions | |
| 15923 | help | is | Please share a https://regex101.com/ link containing your regex and sample data, ask your question, and specify which language/platform you're using. Stay a while, and we'll assist you ASAP. | revisions | |
| 14242 | html | is | Do NOT regex HTML/XML/JSON! Instead, consider using the appropriate parser in your programming language of choice. (http://bit.ly/1G8p6VH) | revisions | |
| 13403 | htmlparser | is | <fact parser> Not Available |
revisions | |
| 15785 | humor | is | https://xkcd.com/208/, https://xkcd.com/1171/ | revisions | |
| 15788 | humour | is | <fact humor> https://xkcd.com/208/, https://xkcd.com/1171/ |
revisions | |
| 14864 | ignore | is | <echo> |
revisions | |
| 15402 | ip | is | Sample IPv4 regex: https://regex101.com/r/ZKgWGG/1 | Note: Be aware of the many different valid IP formats: https://blog.dave.tf/post/ip-addr-parsing/ | revisions | |
| 14196 | jaytea | is | striving for timvderfection | revisions | |
| 14195 | jd2 | is | <fact johndoe2> <JohnDoe2> well either way, here's something you can play with |
revisions | |
| 14194 | johndoe2 | is | <JohnDoe2> well either way, here's something you can play with | revisions | |
| 14244 | json | is | <fact html> Do NOT regex HTML/XML/JSON! Instead, consider using the appropriate parser in your programming language of choice. (http://bit.ly/1G8p6VH) |
revisions | |
| 15928 | jsonregex | is | For a PCRE solution for a JSON parser, this may be an acceptable solution: https://regex101.com/r/tA9pM8/1 | revisions | |
| 14847 | k | is | <echo> |
revisions | |
| 15733 | karma | is | <karma <eval ("<arg>" ne "") ? "<arg>" : "<arg &n>">> henk has karma of 5 |
revisions | |
| 14846 | kb | is | <echo> |
revisions | |
| 14199 | lib | is | <fact library> https://regex101.com/library |
revisions | |
| 14198 | library | is | https://regex101.com/library | revisions | |
| 16132 | link | is | Please click Save on the left side of https://regex101.com/ and share your link here. (https://i.ibb.co/68c2YnH/s.png) | revisions | |
| 14911 | ln | is | `compose `eval $a=`fact _getarg_perl_array `arg~~;$s=$a->[0]eq'-s'; @$a=grep{!/-s/}@$a; if(@$a!=2){return "<echo Syntax: ln [-s] existing_factoid new_factoid>"}; ($l,$r)=@$a; return "<fact macro $r is [fact $l [arg]]>" if $s; "<fact $r is <fact $l>>"~~ Stored source is [fact ##NULL source [arg]] |
revisions | |
| 12592 | lookahead | is | <fact lookaround> Not Available |
revisions | |
| 12587 | lookaround | is | http://www.regular-expressions.info/lookaround.html | revisions | |
| 12721 | lookarounds | is | <fact lookaround> http://www.regular-expressions.info/lookaround.html |
revisions | |
| 12593 | lookbehind | is | <fact lookaround> http://www.regular-expressions.info/lookaround.html |
revisions | |
| 16131 | lua | is | Since the Lua regex syntax differs significantly from other flavors, https://gitspartv.github.io/lua-patterns/ may be a good reference. | revisions | |
| 11963 | me-me | is | <Me-me> I don't know programming languages, just regex. | revisions | |
| 14903 | my purpose | is | <fact ##NULL my purpose <arg>> You're not allowed to ask me that. |
revisions | |
| 12481 | names | is | http://www.kalzumeus.com/2010/06/17/falsehoods-programmers-believe-about-names/ | revisions | |
| 15660 | naughtystrings | is | https://github.com/minimaxir/big-list-of-naughty-strings/blob/master/blns.txt | revisions | |
| 14629 | newline | is | Match Unix style newlines: \n Match DOS/Windows/Unix style newlines: \r?\n Match all types of newlines: (?:\r?\n|\r) or $\s+?^ in multiline mode Match all newlines and vertical whitespace in Perl/PCRE/Boost: \R | revisions | |
| 14623 | newlines | is | <fact newline> Not Available |
revisions | |
| 15489 | nfa | is | https://compiler.org/reason-re-nfa/src/ | revisions | |
| 15878 | notepad++ | is | uses Boost (basically PCRE), https://npp-user-manual.org/docs/searching/#regular-expressions | revisions | |
| 15973 | number | is | `^-?\d+(?:[.]\d+)?(?:[Ee][+-]?\d+)?$` | revisions | |
| 14853 | o | is | <echo> |
revisions | |
| 14234 | omrsi | is | NOT Ouims | revisions | |
| 14781 | ouims | is | <+Ouims> 10€ and i'll give you the shortest :: <+Ouims> sorry i accidentally forked the regex | revisions | |
| 13402 | parser | is | Suggested HTML parsers: PHP: DOMDocument, Ruby: Nokogiri, JavaScript: querySelector | revisions | |
| 15918 | password | is | Don't put arbitrary restrictions on passwords! Use an entropy-based system like zxcvbn (https://github.com/dropbox/zxcvbn), and make sure to use modern hashes (md5 is too old; argon2 is recommended, pbkdf2 or scrypt are acceptable). (https://www.xkcd.com/936/) | revisions | |
| 15789 | passwords | is | <fact password> Don't put arbitrary restrictions on passwords! Use an entropy-based system like zxcvbn (https://github.com/dropbox/zxcvbn), and make sure to use modern hashes (md5 is too old; argon2 is recommended, pbkdf2 or scrypt are acceptable). (https://www.xkcd.com/936/) |
revisions | |
| 15609 | paste | is | Please use https://bpa.st/ for sharing large amounts of code/data, or https://ideone.com/ to share an executable code sample. | revisions | |
| 15054 | pastebin | is | <fact paste> Please use https://bpa.st/ for sharing large amounts of code/data, or https://ideone.com/ to share an executable code sample. |
revisions | |
| 15499 | pcre | is | http://pcre.org/pcre.txt, http://pcre.org/pcre2.txt | revisions | |
| 15429 | pcre2 | is | PCRE2 sandbox - substitution: https://bit.ly/36ax6nh matching: https://tinyurl.com/PCRE2-palindrome client-side substitution and matching: https://kingbird.myphotos.cc/regex/pcre2test.html | revisions | |
| 15746 | perlbot | is | dead | revisions | |
| 16108 | phone | is | A simple (###) ###-#### phone number validator could be: /^[(]?(\d{3})[) -]*(\d{3})[ -]*(\d{4})$/gm - For anything else, we recommend using libphonenumber or a similar library. | revisions | |
| 13750 | pi | is | 3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964 | revisions | |
| 13417 | posix | is | https://www.regular-expressions.info/posixbrackets.html | revisions | |
| 14794 | precious | is | https://www.dropbox.com/s/vs6j3f1la0khptw/precious.png | revisions | |
| 15792 | py | is | <fact python> Python regex module: https://pypi.org/project/regex/ | Online compiler: https://www.online-python.com/ |
revisions | |
| 15791 | python | is | Python regex module: https://pypi.org/project/regex/ | Online compiler: https://www.online-python.com/ | revisions | |
| 15410 | qs | is | https://regex101.com/?regex=&flags=&delimiter=&flavor=&testString=&subst= | revisions | |
| 15055 | question | is | How to Ask Questions the Smart Way - http://www.catb.org/~esr/faqs/smart-questions.html | revisions | |
| 15056 | questions | is | <fact question> How to Ask Questions the Smart Way - http://www.catb.org/~esr/faqs/smart-questions.html |
revisions | |
| 14227 | quiz | is | https://regex101.com/quiz | revisions | |
| 12290 | r | is | http://www.regular-expressions.info/rlanguage.html which describes multiple regex flavors for R, including PCRE, POSIX BRE and ERE. | revisions | |
| 16024 | re | is | `compose `eval use PPR; $x=`quote d `arg!!; ($l, $r) = ($x=~m/((?&PerlSubstitution))\s+(.*)$PPR::GRAMMAR/); $_=$r; s/'/\\'/; sprintf '[eval $x=\'%s\'; $x =~ %s; "output: ".$x]', $_, $l;!! Error: unmatched opening parenthesis in compose |
revisions | |
| 15793 | re101 | is | You can use https://regex101.com/ to test your regular expressions, for posting examples, and even to view a detailed explanation of your pattern. | revisions | |
| 15635 | re2 | is | https://github.com/google/re2/wiki/Syntax | revisions | |
| 15892 | re2str | is | https://onlinestringtools.com/generate-string-from-regex | revisions | |
| 15795 | recurse | is | <fact recursion> https://www.regular-expressions.info/recurse.html (https://www.regular-expressions.info/refrecurse.html) |
revisions | |
| 15794 | recursion | is | https://www.regular-expressions.info/recurse.html (https://www.regular-expressions.info/refrecurse.html) | revisions | |
| 15867 | ref | is | http://www.regular-expressions.info/refflavors.html | revisions | |
| 15868 | reference | is | <fact ref> | revisions | |
| 16026 | regex | is | <echo> |
revisions | |
| 16054 | #regex c_comments | is | To match '//...' line comments and '/*...*/' block comments, see: https://regex101.com/r/41Qebw/28 | revisions | |
| 11806 | reinfo | is | http://www.regular-expressions.info/ | revisions | |
| 16167 | relay101 | is | Messages are bridged between the RexEx101 Discord channel https://discord.gg/wUA6F6YqSs and IRC. The relay101 bot prefixes each message with the writer's nick. | revisions | |
| 15119 | revisionsurl | is | `eval use URI::Encode; sub e{URI::Encode::uri_encode$_[0],{encode_reserved=>1}}; $_=`quote d `arg &s!\`arg &c!!; m|^.*?([^.]+\.[^.]+)\\(.*?)$|; sprintf "https://factoids.perl.bot/%s/%s/revisions?fact=%s", e($1), e($2), e(`quote d `arg!!)! Not Available |
revisions | |
| 15798 | \s | is | \s matches any whitespace character, such as a space or newline. \s is equivalent to [\r\n\t\f\v ], or [\p{Z}\h\v] in unicode mode (/u flag or (*UCP) pattern modifier). | revisions | |
| 15739 | save | is | <fact link> Please click Save on the left side of https://regex101.com/ and share your link here. (https://i.ibb.co/68c2YnH/s.png) |
revisions | |
| 15019 | searchurl | is | `eval use URI::Encode; sub e{URI::Encode::uri_encode$_[0],{encode_reserved=>1}}; $_=`quote d `arg &s!:`arg &c!!; m|^.*?([^.]+\.[^.]+):(.*?)$|; sprintf "https://factoids.perl.bot/%s/%s/search?q=%s", e($1), e($2), e(`quote d `arg!!)! https://factoids.perl.bot/freenode.net/%23regex/search?q=rehelp |
revisions | |
| 14730 | seen | is | <echo> |
revisions | |
| 14734 | seentot | is | <echo> |
revisions | |
| 12922 | semicolons | is | Remove all ; (semicolons) except if they're inside a string ("", '', ``). Replace with $1 ("[^\\"\r\n]*(?:\\.[^\\"\r\n]*)*"|'[^\\'\r\n]*(?:\\.[^\\'\r\n]*)*'|`[^\\`]*(?:\\.[^\\`]*)*`)|; | revisions | |
| 14898 | snack | is | *om nom nom* | revisions | |
| 15653 | source | is | [fact ##NULL source [arg]] |
revisions | |
| 12921 | strings | is | You can match common double-quoted strings with "[^\\"]*(?:\\.[^\\"]*)*" which handles "strings \"within\" strings". Replacing the double quotes with single quotes can allow 'this \'string\' to match' if desired. | revisions | |
| 16100 | tcl | is | Tcl regex is described on https://wiki.tcl-lang.org/page/Regular+Expression and its syntax described on https://www.tcl-lang.org/man/tcl/TclCmd/regexp.html | revisions | |
| 15697 | testuser | is | bruh | revisions | |
| 14328 | thanks | is | Of course! | revisions | |
| 14430 | the_tick | is | <The_Tick> I'm not trying to teach anyone anything | revisions | |
| 13986 | timvde | is | better than jaytea | revisions | |
| 16086 | top | is | <karmatop <arg>> c: 23167 notepad: 3434 moritz: 2129 i: 2074 jj merelo: 1951 mst: 1473 mauke: 1317 pmichaud: 1294 fglock: 1137 pmurias: 1129 |
revisions | |
| 15802 | tut | is | <fact tutorials> https://www.regular-expressions.info/tutorial.html, http://www.rexegg.com/, https://regexone.com/, https://youtu.be/ubvSjW6Nyqk |
revisions | |
| 15800 | tutorial | is | <fact tutorials> https://www.regular-expressions.info/tutorial.html, http://www.rexegg.com/, https://regexone.com/, https://youtu.be/ubvSjW6Nyqk |
revisions | |
| 15871 | tutorials | is | https://www.regular-expressions.info/tutorial.html, http://www.rexegg.com/, https://regexone.com/, https://youtu.be/ubvSjW6Nyqk | revisions | |
| 15801 | tuts | is | <fact tutorials> https://www.regular-expressions.info/tutorial.html, http://www.rexegg.com/, https://regexone.com/, https://youtu.be/ubvSjW6Nyqk |
revisions | |
| 14327 | ty | is | You're welcome! | revisions | |
| 15809 | unicode | is | http://www.regular-expressions.info/refunicode.html, https://www.fileformat.info/info/unicode/category/index.htm | revisions | |
| 15974 | update | is | Please use "Update Regex" instead of "Save Regex" on regex101 after modifying your pattern, sample text, etc. This makes it easier to switch between revisions and provide you timely support. | revisions | |
| 12939 | url | is | https://mathiasbynens.be/demo/url-regex | revisions | |
| 14855 | v | is | <echo> |
revisions | |
| 13819 | vim | is | https://remram44.github.io/regex-cheatsheet/regex.html, http://vimdoc.sourceforge.net/htmldoc/pattern.html | revisions | |
| 14302 | wiki | is | https://github.com/firasdib/Regex101/wiki | revisions | |
| 15804 | xkcd | is | <fact humor> https://xkcd.com/208/, https://xkcd.com/1171/ |
revisions | |
| 14243 | xml | is | <fact html> Do NOT regex HTML/XML/JSON! Instead, consider using the appropriate parser in your programming language of choice. (http://bit.ly/1G8p6VH) |
revisions | |
| 15618 | xregexp | is | XRegExp adds ES6 compatibility to older browsers. https://github.com/slevithan/xregexp/ | revisions | |
| 16021 | xy | is | You want to do X, but don't know how. You think you can solve it using Y, but don't know how to do that, either. So, you ask about Y in order to solve X, which doesn't make sense. Just ask about X! (More at https://xyproblem.info/) | revisions | |
| 13880 | zarthus | is | <Zarthus> You don't need regex for that. | <Zarthus> Use a parser. | <Zarthus> Keep in mind my regex won't work. | revisions |