These are the factoids for <freenode.net:#regex>.
| factoid_id | subject | copula | predicate | history | from namespace |
|---|---|---|---|---|---|
| 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 | |
| 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 | |
| 11806 | reinfo | is | http://www.regular-expressions.info/ | revisions | |
| 11963 | me-me | is | <Me-me> I don't know programming languages, just regex. | revisions | |
| 12133 | blog | is | https://firasdib.com/blog/ | revisions | |
| 12238 | digitok | is | (*F) | 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 | |
| 12339 | enter | is | Do not use the Enter key as punctuation. Think in complete thoughts, then type. | revisions | |
| 12481 | names | is | http://www.kalzumeus.com/2010/06/17/falsehoods-programmers-believe-about-names/ | revisions | |
| 12587 | lookaround | is | http://www.regular-expressions.info/lookaround.html | revisions | |
| 12592 | lookahead | is | <fact lookaround> Not Available |
revisions | |
| 12593 | lookbehind | is | <fact lookaround> http://www.regular-expressions.info/lookaround.html |
revisions | |
| 12594 | doqnach | is | Do you really need regex for that? | revisions | |
| 12721 | lookarounds | is | <fact lookaround> http://www.regular-expressions.info/lookaround.html |
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 | |
| 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 | |
| 12939 | url | is | https://mathiasbynens.be/demo/url-regex | revisions | |
| 13402 | parser | is | Suggested HTML parsers: PHP: DOMDocument, Ruby: Nokogiri, JavaScript: querySelector | revisions | |
| 13403 | htmlparser | is | <fact parser> Not Available |
revisions | |
| 13417 | posix | is | https://www.regular-expressions.info/posixbrackets.html | revisions | |
| 13749 | api | is | https://github.com/firasdib/Regex101/wiki/API | revisions | |
| 13750 | pi | is | 3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964 | 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 | |
| 13819 | vim | is | https://remram44.github.io/regex-cheatsheet/regex.html, http://vimdoc.sourceforge.net/htmldoc/pattern.html | 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 | |
| 13986 | timvde | is | better than jaytea | revisions | |
| 14194 | johndoe2 | is | <JohnDoe2> well either way, here's something you can play with | revisions | |
| 14195 | jd2 | is | <fact johndoe2> <JohnDoe2> well either way, here's something you can play with |
revisions | |
| 14196 | jaytea | is | striving for timvderfection | revisions | |
| 14198 | library | is | https://regex101.com/library | revisions | |
| 14199 | lib | is | <fact library> https://regex101.com/library |
revisions | |
| 14227 | quiz | is | https://regex101.com/quiz | revisions | |
| 14234 | omrsi | is | NOT Ouims | 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 | |
| 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 | |
| 14302 | wiki | is | https://github.com/firasdib/Regex101/wiki | 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 | |
| 14327 | ty | is | You're welcome! | revisions | |
| 14328 | thanks | is | Of course! | revisions | |
| 14430 | the_tick | is | <The_Tick> I'm not trying to teach anyone anything | revisions | |
| 14623 | newlines | is | <fact newline> Not Available |
revisions | |
| 14624 | davidebyzero | is | not even hard | 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 | |
| 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 | |
| 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 | |
| 14730 | seen | is | <echo> |
revisions | |
| 14734 | seentot | is | <echo> |
revisions | |
| 14781 | ouims | is | <+Ouims> 10€ and i'll give you the shortest :: <+Ouims> sorry i accidentally forked the regex | revisions | |
| 14794 | precious | is | https://www.dropbox.com/s/vs6j3f1la0khptw/precious.png | revisions | |
| 14846 | kb | is | <echo> |
revisions | |
| 14847 | k | is | <echo> |
revisions | |
| 14848 | b | is | <echo> |
revisions | |
| 14853 | o | is | <echo> |
revisions | |
| 14854 | do | is | <echo> |
revisions | |
| 14855 | v | is | <echo> |
revisions | |
| 14856 | dv | is | <echo> |
revisions | |
| 14864 | ignore | is | <echo> |
revisions | |
| 14898 | snack | is | *om nom nom* | revisions | |
| 14903 | my purpose | is | <fact ##NULL my purpose <arg>> You're not allowed to ask me that. |
revisions | |
| 14910 | _getarg_perl_array | is | `eval use Text::ParseWords; my @words = shellwords(`quote d `arg!!); \@words! ["-s","##NULL source","source"] |
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 $l>>"~~ Stored source is [fact ##NULL source [arg]] |
revisions | |
| 14914 | is | <echo> |
revisions | ||
| 14978 | 8ball | is | <8ball <arg>> Outlook not so good |
revisions | |
| 15017 | factoidsurl | is | `eval use URI::Encode; sub e{URI::Encode::uri_encode$_[0],{encode_reserved=>1}}; $_=`quote d `arg &s!:`arg &c!!; m|^.*?([^.]+\.[^.]+):(.*?)$|; sprintf "https://factoids.perl.bot/%s/%s/list", e($1), e($2)! https://factoids.perl.bot/libera.chat/%23regex/list |
revisions | |
| 15019 | searchurl | is | `eval use URI::Encode; sub e{URI::Encode::uri_encode$_[0],{encode_reserved=>1}}; $_=`quote d `arg &s!:`arg &c!!; m|^.*?([^.]+\.[^.]+):(.*?)$|; sprintf "https://factoids.perl.bot/%s/%s/search?q=%s", e($1), e($2), e(`quote d `arg!!)! https://factoids.perl.bot/freenode.net/%23regex/search?q=rehelp |
revisions | |
| 15054 | pastebin | is | <fact paste> Please use https://bpa.st/ for sharing large amounts of code/data, or https://ideone.com/ to share an executable code sample. |
revisions | |
| 15055 | question | is | How to Ask Questions the Smart Way - http://www.catb.org/~esr/faqs/smart-questions.html | revisions | |
| 15056 | questions | is | <fact question> How to Ask Questions the Smart Way - http://www.catb.org/~esr/faqs/smart-questions.html |
revisions | |
| 15119 | revisionsurl | is | `eval use URI::Encode; sub e{URI::Encode::uri_encode$_[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 | |
| 15169 | _be__default | is | _be_noob or _be_noob | 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 | |
| 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 | |
| 15275 | codegen | is | Select code generator on the left side of regex101 to view sample code for your language of choice. | revisions | |
| 15385 | bre | is | POSIX: https://www.regular-expressions.info/posix.html, GNU: https://www.regular-expressions.info/gnu.html | revisions | |
| 15386 | ere | is | <fact bre> POSIX: https://www.regular-expressions.info/posix.html, GNU: https://www.regular-expressions.info/gnu.html |
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 | |
| 15403 | is | http://www.regular-expressions.info/email.html, https://emailregex.com/, https://regex101.com/library?orderBy=MOST_POINTS&search=email | revisions | ||
| 15410 | qs | is | https://regex101.com/?regex=&flags=&delimiter=&flavor=&testString=&subst= | 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 | |
| 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 | |
| 15489 | nfa | is | https://compiler.org/reason-re-nfa/src/ | revisions | |
| 15499 | pcre | is | http://pcre.org/pcre.txt, http://pcre.org/pcre2.txt | revisions | |
| 15519 | balancing-group | is | https://docs.microsoft.com/en-us/dotnet/standard/base-types/grouping-constructs-in-regular-expressions#balancing_group_definition | revisions | |
| 15561 | awk | is | https://docs.google.com/presentation/d/1l9S_6QB8ES5vrp573Ms578qhSEC0xE_xjazJKNyHoSI | 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 | |
| 15618 | xregexp | is | XRegExp adds ES6 compatibility to older browsers. https://github.com/slevithan/xregexp/ | revisions | |
| 15635 | re2 | is | https://github.com/google/re2/wiki/Syntax | revisions | |
| 15653 | source | is | [fact ##NULL source [arg]] |
revisions | |
| 15660 | naughtystrings | is | https://github.com/minimaxir/big-list-of-naughty-strings/blob/master/blns.txt | revisions | |
| 15672 | bash | is | <basheval <arg>> |
revisions | |
| 15697 | testuser | is | bruh | revisions | |
| 15733 | karma | is | <karma <eval ("<arg>" ne "") ? "<arg>" : "<arg &n>">> henk has karma of 2 |
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 | |
| 15742 | bruh | is | testuser | revisions | |
| 15746 | perlbot | is | dead | revisions | |
| 15754 | bruhbot | is | perlbot | 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 | |
| 15766 | forgot | is | I forgor ð | 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 | |
| 15775 | bugs | is | Just because nobody complains, doesn't mean all parachutes are perfect. | 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 | |
| 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 | |
| 15781 | fake | is | If you provide fake or incomplete sample text, we'll only be able to provide fake and incomplete regex solutions. | revisions | |
| 15782 | go|dfish | is | <go|dfish> you could just pretend basic doesn't exist, it's better that way | revisions | |
| 15783 | github | is | https://github.com/firasdib/Regex101 | revisions | |
| 15784 | git | is | <fact github> 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 | |
| 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 | |
| 15791 | python | is | Python regex module: https://pypi.org/project/regex/ | Online compiler: https://www.online-python.com/ | revisions | |
| 15792 | py | is | <fact python> Python regex module: https://pypi.org/project/regex/ | Online compiler: https://www.online-python.com/ |
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 | |
| 15794 | recursion | is | https://www.regular-expressions.info/recurse.html (https://www.regular-expressions.info/refrecurse.html) | revisions | |
| 15795 | recurse | is | <fact recursion> https://www.regular-expressions.info/recurse.html (https://www.regular-expressions.info/refrecurse.html) |
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 | |
| 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 | |
| 15804 | xkcd | is | <fact humor> https://xkcd.com/208/, https://xkcd.com/1171/ |
revisions | |
| 15809 | unicode | is | http://www.regular-expressions.info/refunicode.html, https://www.fileformat.info/info/unicode/category/index.htm | revisions | |
| 15867 | ref | is | http://www.regular-expressions.info/refflavors.html | revisions | |
| 15868 | reference | is | <fact ref> | revisions | |
| 15871 | tutorials | is | https://www.regular-expressions.info/tutorial.html, http://www.rexegg.com/, https://regexone.com/, https://youtu.be/ubvSjW6Nyqk | revisions | |
| 15878 | notepad++ | is | uses Boost (basically PCRE), https://npp-user-manual.org/docs/searching/#regular-expressions | revisions | |
| 15892 | re2str | is | https://onlinestringtools.com/generate-string-from-regex | 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 | |
| 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 | |
| 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 | |
| 15928 | jsonregex | is | For a PCRE solution for a JSON parser, this may be an acceptable solution: https://regex101.com/r/tA9pM8/1 | revisions | |
| 15939 | phone | is | A simple (###) ###-#### phone number validator could be: /^\(?(\d{3})\)? ?(\d{3})-?(\d{4})$/ - For anything else, we recommend using libphonenumber or a similar library. | revisions | |
| 15956 | csv | is | Care should be used when splitting/parsing CSV (comma-separated) and TSV (tab-separated) files; fields may include "double quotes" where a "" pair of double quotes within are used to represent a double-quote literal. | revisions | |
| 15973 | number | is | `^-?\d+(?:[.]\d+)?(?:[Ee][+-]?\d+)?$` | 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 | |
| 15993 | compare | is | https://en.wikipedia.org/wiki/Comparison_of_regular_expression_engines | 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 | |
| 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 | |
| 16026 | regex | is | <echo> |
revisions | |
| 16027 | date | is | never got added | revisions | |
| 16039 | crlf | is | (?:\r?\n) can be used to match both Windows and Linux line endings | 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 | |
| 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 | |
| 16087 | bottom | is | <karmatop -<arg>> Not Available |
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 | |
| 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 |