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>> Outlook not so good |
revisions | |
| 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>> a↵ |
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>> Unquoted string "i" may clash with future reserved word at (IRC) line 1. Unquoted string "i" may clash with future reserved word at (IRC) line 1. Unquoted string "echo" may clash with future reserved word at (IRC) line 1. Scalar found where operator expected at (IRC) line 1, near "echo $i" (Do you need to predeclare echo?) Unquoted string "done" may clash with future reserved word at (IRC) line 1. Unquoted string "then" may clash with future reserved word at (IRC) line 1. Unquoted string "fi" may clash with future reserved word at (IRC) line 1. ERROR: Can't modify constant item in scalar assignment at (IRC) line 1, near "0;" syntax error at (IRC) line 1, near "if while" syntax error at (IRC) line 1, near "echo $i" syntax error at (IRC) line 1, near "then printf" |
revisions | |
| 15017 | factoidsurl | is | `eval use URI::Encode; sub e{URI::Encode::uri_encode$_[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 | |
| 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>">> davido has karma of 2 |
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]', $_, $l;!! Compose failed to find a plugin named: a-fA-F0-9 |
revisions | |
| 15793 | re101 | is | You can use https://regex101.com/ to test your regular expressions, for posting examples, and even to view a detailed explanation of your pattern. | revisions | |
| 15635 | re2 | is | https://github.com/google/re2/wiki/Syntax | revisions | |
| 15892 | re2str | is | https://onlinestringtools.com/generate-string-from-regex | revisions | |
| 15795 | recurse | is | <fact recursion> https://www.regular-expressions.info/recurse.html (https://www.regular-expressions.info/refrecurse.html) |
revisions | |
| 15794 | recursion | is | https://www.regular-expressions.info/recurse.html (https://www.regular-expressions.info/refrecurse.html) | revisions | |
| 15867 | ref | is | http://www.regular-expressions.info/refflavors.html | revisions | |
| 15868 | reference | is | <fact ref> | revisions | |
| 16026 | regex | is | <echo> |
revisions | |
| 16054 | #regex c_comments | is | To match '//...' line comments and '/*...*/' block comments, see: https://regex101.com/r/41Qebw/28 | revisions | |
| 11806 | reinfo | is | http://www.regular-expressions.info/ | revisions | |
| 16167 | relay101 | is | Messages are bridged between the RexEx101 Discord channel https://discord.gg/wUA6F6YqSs and IRC. The relay101 bot prefixes each message with the writer's nick. | revisions | |
| 15119 | revisionsurl | is | `eval use URI::Encode; sub e{URI::Encode::uri_encode$_[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: 21986 notepad: 3296 moritz: 2129 |
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 |