These are the factoids for <freenode.net:#regex>.
| factoid_id | subject | copula | predicate | history | from namespace |
|---|---|---|---|---|---|
| 13750 | pi | is | 3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964 | revisions | |
| 14978 | 8ball | is | <8ball <arg>> Outlook not so good |
revisions | |
| 15939 | phone | is | A simple (###) ###-#### phone number validator could be: /^\(?(\d{3})\)? ?(\d{3})-?(\d{4})$/ - For anything else, we recommend using libphonenumber or a similar library. | 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 | |
| 15672 | bash | is | <basheval <arg>> |
revisions | |
| 15169 | _be__default | is | _be_noob or _be_noob | revisions | |
| 13986 | timvde | is | better than jaytea | revisions | |
| 15697 | testuser | is | bruh | 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 | |
| 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 | |
| 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]', $_, $l;!! Error: unmatched opening parenthesis in compose |
revisions | |
| 15973 | number | is | `^-?\d+(?:[.]\d+)?(?:[Ee][+-]?\d+)?$` | revisions | |
| 15746 | perlbot | is | dead | 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 | |
| 12339 | enter | is | Do not use the Enter key as punctuation. Think in complete thoughts, then type. | 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 | |
| 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 | |
| 12594 | doqnach | is | Do you really need regex for that? | revisions | |
| 14853 | o | is | <echo> |
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| 14848 | b | is | <echo> |
revisions | |
| 16026 | regex | is | <echo> |
revisions | |
| 14855 | v | is | <echo> |
revisions | |
| 14914 | is | <echo> |
revisions | ||
| 14730 | seen | is | <echo> |
revisions | |
| 14846 | kb | is | <echo> |
revisions | |
| 14847 | k | is | <echo> |
revisions | |
| 14854 | do | is | <echo> |
revisions | |
| 14856 | dv | is | <echo> |
revisions | |
| 14734 | seentot | is | <echo> |
revisions | |
| 14864 | ignore | is | <echo> |
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 | |
| 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? |
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| 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 | |
| 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 | |
| 14910 | _getarg_perl_array | is | `eval use Text::ParseWords; my @words = shellwords(`quote d `arg!!); \@words! ["-s","##NULL source","source"] |
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($2)! https://factoids.perl.bot/libera.chat/%23regex/list |
revisions | |
| 15119 | revisionsurl | is | `eval use URI::Encode; sub e{URI::Encode::uri_encode$_[0],{encode_reserved=>1}}; $_=`quote d `arg &s!\`arg &c!!; m|^.*?([^.]+\.[^.]+)\\(.*?)$|; sprintf "https://factoids.perl.bot/%s/%s/revisions?fact=%s", e($1), e($2), e(`quote d `arg!!)! Not Available |
revisions | |
| 15019 | searchurl | is | `eval use URI::Encode; sub e{URI::Encode::uri_encode$_[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 | |
| 12238 | digitok | is | (*F) | revisions | |
| 15386 | ere | is | <fact bre> POSIX: https://www.regular-expressions.info/posix.html, GNU: https://www.regular-expressions.info/gnu.html |
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 | |
| 15779 | debug | is | <fact debugger> Select regex debugger on the left side of regex101 (PCRE mode only) to see the step-by-step process of your regex being matched against your data. |
revisions | |
| 15784 | git | is | <fact github> Not Available |
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| 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. |
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| 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 | |
| 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 | |
| 15788 | humour | is | <fact humor> https://xkcd.com/208/, https://xkcd.com/1171/ |
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| 15804 | xkcd | is | <fact humor> https://xkcd.com/208/, https://xkcd.com/1171/ |
revisions | |
| 14195 | jd2 | is | <fact johndoe2> <JohnDoe2> well either way, here's something you can play with |
revisions | |
| 14199 | lib | is | <fact library> https://regex101.com/library |
revisions | |
| 15739 | save | is | <fact link> Please click Save on the left side of regex101.com and share your link here. (https://i.ibb.co/68c2YnH/s.png) |
revisions | |
| 12592 | lookahead | is | <fact lookaround> Not Available |
revisions | |
| 12593 | lookbehind | is | <fact lookaround> http://www.regular-expressions.info/lookaround.html |
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| 12721 | lookarounds | is | <fact lookaround> http://www.regular-expressions.info/lookaround.html |
revisions | |
| 14623 | newlines | is | <fact newline> Not Available |
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| 14903 | my purpose | is | <fact ##NULL my purpose <arg>> You're not allowed to ask me that. |
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| 15653 | source | is | [fact ##NULL source [arg]] |
revisions | |
| 13403 | htmlparser | is | <fact parser> Not Available |
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 | |
| 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 | |
| 15792 | py | is | <fact python> Python regex module: https://pypi.org/project/regex/ | Online compiler: https://www.online-python.com/ |
revisions | |
| 15056 | questions | is | <fact question> How to Ask Questions the Smart Way - http://www.catb.org/~esr/faqs/smart-questions.html |
revisions | |
| 15795 | recurse | is | <fact recursion> https://www.regular-expressions.info/recurse.html (https://www.regular-expressions.info/refrecurse.html) |
revisions | |
| 15868 | reference | is | <fact ref> | 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 | |
| 15801 | tuts | is | <fact tutorials> https://www.regular-expressions.info/tutorial.html, http://www.rexegg.com/, https://regexone.com/, https://youtu.be/ubvSjW6Nyqk |
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 | |
| 15928 | jsonregex | is | For a PCRE solution for a JSON parser, this may be an acceptable solution: https://regex101.com/r/tA9pM8/1 | revisions | |
| 15782 | go|dfish | is | <go|dfish> you could just pretend basic doesn't exist, it's better that way | revisions | |
| 15173 | _be_noob | is | How do I parse HTML with regex? | revisions | |
| 15055 | question | is | How to Ask Questions the Smart Way - http://www.catb.org/~esr/faqs/smart-questions.html | revisions | |
| 15499 | pcre | is | http://pcre.org/pcre.txt, http://pcre.org/pcre2.txt | revisions | |
| 15489 | nfa | is | https://compiler.org/reason-re-nfa/src/ | revisions | |
| 15561 | awk | is | https://docs.google.com/presentation/d/1l9S_6QB8ES5vrp573Ms578qhSEC0xE_xjazJKNyHoSI | revisions | |
| 15519 | balancing-group | is | https://docs.microsoft.com/en-us/dotnet/standard/base-types/grouping-constructs-in-regular-expressions#balancing_group_definition | revisions | |
| 15993 | compare | is | https://en.wikipedia.org/wiki/Comparison_of_regular_expression_engines | revisions | |
| 12133 | blog | is | https://firasdib.com/blog/ | revisions | |
| 15783 | github | is | https://github.com/firasdib/Regex101 | revisions | |
| 14302 | wiki | is | https://github.com/firasdib/Regex101/wiki | revisions | |
| 13749 | api | is | https://github.com/firasdib/Regex101/wiki/API | revisions | |
| 15635 | re2 | is | https://github.com/google/re2/wiki/Syntax | revisions | |
| 15660 | naughtystrings | is | https://github.com/minimaxir/big-list-of-naughty-strings/blob/master/blns.txt | revisions | |
| 12939 | url | is | https://mathiasbynens.be/demo/url-regex | revisions | |
| 15892 | re2str | is | https://onlinestringtools.com/generate-string-from-regex | revisions | |
| 14198 | library | is | https://regex101.com/library | revisions | |
| 14227 | quiz | is | https://regex101.com/quiz | revisions | |
| 15410 | qs | is | https://regex101.com/?regex=&flags=&delimiter=&flavor=&testString=&subst= | revisions | |
| 13819 | vim | is | https://remram44.github.io/regex-cheatsheet/regex.html, http://vimdoc.sourceforge.net/htmldoc/pattern.html | revisions | |
| 14794 | precious | is | https://www.dropbox.com/s/vs6j3f1la0khptw/precious.png | revisions | |
| 13417 | posix | is | https://www.regular-expressions.info/posixbrackets.html | revisions | |
| 15794 | recursion | is | https://www.regular-expressions.info/recurse.html (https://www.regular-expressions.info/refrecurse.html) | revisions | |
| 15871 | tutorials | is | https://www.regular-expressions.info/tutorial.html, http://www.rexegg.com/, https://regexone.com/, https://youtu.be/ubvSjW6Nyqk | revisions | |
| 15785 | humor | is | https://xkcd.com/208/, https://xkcd.com/1171/ | revisions | |
| 12481 | names | is | http://www.kalzumeus.com/2010/06/17/falsehoods-programmers-believe-about-names/ | revisions | |
| 11806 | reinfo | is | http://www.regular-expressions.info/ | revisions | |
| 15403 | is | http://www.regular-expressions.info/email.html, https://emailregex.com/, https://regex101.com/library?orderBy=MOST_POINTS&search=email | revisions | ||
| 12587 | lookaround | is | http://www.regular-expressions.info/lookaround.html | revisions | |
| 15867 | ref | is | http://www.regular-expressions.info/refflavors.html | revisions | |
| 15809 | unicode | is | http://www.regular-expressions.info/refunicode.html, https://www.fileformat.info/info/unicode/category/index.htm | 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 | |
| 15766 | forgot | is | I forgor ð | 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 | |
| 14194 | johndoe2 | is | <JohnDoe2> well either way, here's something you can play with | revisions | |
| 15775 | bugs | is | Just because nobody complains, doesn't mean all parachutes are perfect. | revisions | |
| 15733 | karma | is | <karma <eval ("<arg>" ne "") ? "<arg>" : "<arg &n>">> henk has karma of 2 |
revisions | |
| 16087 | bottom | is | <karmatop -<arg>> Not Available |
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| 16086 | top | is | <karmatop <arg>> c: 21911 notepad: 3249 moritz: 2129 i: 2028 jj merelo: 1947 mst: 1470 pmichaud: 1294 mauke: 1280 fglock: 1137 pmurias: 1129 |
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 | |
| 11963 | me-me | is | <Me-me> I don't know programming languages, just regex. | revisions | |
| 16027 | date | is | never got added | revisions | |
| 14624 | davidebyzero | is | not even hard | revisions | |
| 14234 | omrsi | is | NOT Ouims | revisions | |
| 14328 | thanks | is | Of course! | revisions | |
| 14898 | snack | is | *om nom nom* | revisions | |
| 14781 | ouims | is | <+Ouims> 10€ and i'll give you the shortest :: <+Ouims> sorry i accidentally forked the regex | 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 | |
| 15754 | bruhbot | is | perlbot | revisions | |
| 15898 | link | is | Please click Save on the left side of regex101.com and share your link here. (https://i.ibb.co/68c2YnH/s.png) | 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 | |
| 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 | |
| 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 | |
| 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 | |
| 15385 | bre | is | POSIX: https://www.regular-expressions.info/posix.html, GNU: https://www.regular-expressions.info/gnu.html | revisions | |
| 15791 | python | is | Python regex module: https://pypi.org/project/regex/ | Online compiler: https://www.online-python.com/ | 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 | |
| 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 | |
| 16039 | crlf | is | (?:\r?\n) can be used to match both Windows and Linux line endings | 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 | |
| 15275 | codegen | is | Select code generator on the left side of regex101 to view sample code for your language of choice. | revisions | |
| 15778 | debugger | is | Select regex debugger on the left side of regex101 (PCRE mode only) to see the step-by-step process of your regex being matched against your data. | 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 | |
| 14196 | jaytea | is | striving for timvderfection | revisions | |
| 13402 | parser | is | Suggested HTML parsers: PHP: DOMDocument, Ruby: Nokogiri, JavaScript: querySelector | 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 | |
| 15742 | bruh | is | testuser | revisions | |
| 14430 | the_tick | is | <The_Tick> I'm not trying to teach anyone anything | revisions | |
| 16054 | #regex c_comments | is | To match '//...' line comments and '/*...*/' block comments, see: https://regex101.com/r/41Qebw/28 | revisions | |
| 16056 | c_comments | is | To match '//...' line comments and '/.../' block comments, see: regex101.com/r/41Qebw/28 | 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 | |
| 15878 | notepad++ | is | uses Boost (basically PCRE), https://npp-user-manual.org/docs/searching/#regular-expressions | 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 | |
| 15618 | xregexp | is | XRegExp adds ES6 compatibility to older browsers. https://github.com/slevithan/xregexp/ | 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 | |
| 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 | |
| 14327 | ty | is | You're welcome! | 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 |