Regex Previewer - Visual Studio Marketplace
Launch VS Code Quick Open (Ctrl+P), paste the following command, and press enter. Features Shows the current regular expression's matches in a side-by-side document. This can be turned on/off with Ctrl+Alt+M (⌥⌘M). Global and multiline options can be added for evaluation with a side-by-side document through a status bar entry. This can be useful when the side-by-side document has multiple examples
GitHub - pemistahl/grex-js: A JavaScript / WebAssembly library for generating regular expressions from user-provided test cases
grex is a library that is meant to simplify the often complicated and tedious task of creating regular expressions. It does so by automatically generating a single regular expression from user-provided test cases. The resulting expression is guaranteed to match the test cases which it was generated from. This project has started as a Rust port of the JavaScript tool regexgen written by Devon Govet
æ£è¦è¡¨ç¾ã®è„†å¼±æ€§ (ReDoS) ã‚’ JavaScript ã§å¦ã¶
先日ã€ã“ã®ã‚ˆã†ãªãƒ„イートを書ã„ãŸã¨ã“ã‚ã€ã‹ãªã‚Šã®å響ãŒã‚ã‚Šã¾ã—ãŸã€‚ JavaScript ã®æ£è¦è¡¨ç¾ã®è„†å¼±æ€§ã®ä¾‹ã§ã„ã†ã¨ã€ä¾‹ãˆã° /\s+$/ ã¯è„†å¼±æ€§ãŒã‚ã‚‹ã¨è¨€ãˆã‚‹ console.time(); /\s+$/.test(" ".repeat(65536) + "a"); console.timeEnd(); çµæ§‹æ™‚é–“ãŒã‹ã‹ã‚‹ã®ãŒã‚ã‹ã‚‹ã€‚ã§ã‚‚ /\s+$/ を見ã¦ã€Œã“ã‚Œã¯å±é™ºã ãªã€ã¨ç†è§£å‡ºæ¥ã‚‹äººã¯ãã‚“ãªã«ã„ãªã„。JavaScript ã«é™ã‚‰ãªã„ã‘ã‚Œã©ã€‚ — Takuo Kihira (@tkihira) February 17, 2022 ã“ã‚Œã¯ä¸€èˆ¬ã« ReDoS (Regular expression Denial of Service) ã¨å‘¼ã°ã‚Œã‚‹è„†å¼±æ€§ã§ã™ã€‚æ£ç¢ºã«ç†è§£ã™ã‚‹ã®ãŒé›£ã—ã„脆弱性ãªã®ã§ã€å°‘ã—解説ã—ã¦ã¿ãŸã„ã¨æ€ã„ã¾ã™ã€‚ çµè«– é•·ã„記事ã«ãªã‚‹ã®ã§ã€æœ€åˆã«ã€Œã¨ã‚Šã‚ãˆãšã“ã‚Œã ã‘知ã£
Uniform Resource Identifier (URI): 一般的構文
Studying HTTP > RFC-Translations related HTTP ã“ã®æ–‡æ›¸ã¯ã€ T. Berners-Lee, R. Fielding, L. Masinter: Uniform Resource Identifier (URI): Generic Syntax (RFC 3986), January 2005. ã‚’ 橋本英彦 ãŒæ—¥æœ¬èªžè¨³ã—ãŸç‰©ã§ã™ã€‚ ã“ã®æ–‡æ›¸ã®å–り扱ã„ã«ã¤ã„ã¦ã¯ã€[Studying HTTP] ã® RFC 日本語訳を利用ã™ã‚‹ã«ã‚ãŸã£ã¦ã«å¾“ã£ã¦ä¸‹ã•ã„。 Network Working Group Request for Comments: 3986 STD: 66 Updates: 1738 Obsoletes: 2732, 2396, 1808 Category: Standards Track T. Berners-Lee W3C/MIT R.
In search of the perfect URL validation regex
To clarify, I’m looking for a decent regular expression to validate URLs that were entered as user input with. I have no interest in parsing a list of URLs from a given string of text (even though some of the regexes on this page are capable of doing that). I also don’t want to allow every possible technically valid URL — quite the opposite. See the URL Standard if you’re looking to parse URLs in
鬼雲ã«éžåŒ…å«ã‚ªãƒšãƒ¬ãƒ¼ã‚¿ã‚’実装ã—ãŸè©± - Qiita
æ¦‚è¦ ç”°ä¸å“²ã•ã‚“(@tanaka_akr)ãŒä»¥å‰æ案ã•ã‚ŒãŸã€ŒéžåŒ…å«ã‚ªãƒšãƒ¬ãƒ¼ã‚¿ã€ã¨ã„ã†ã‚‚ã®ã‚’（実験的ã«ï¼‰é¬¼é›²ã«å®Ÿè£…ã—ã¾ã—ãŸã€‚ã“れを使ã†ã¨ä¾‹ãˆã° C 言語ã®ã‚³ãƒ¡ãƒ³ãƒˆã«ãƒžãƒƒãƒã™ã‚‹æ£è¦è¡¨ç¾ãªã©ãŒç°¡å˜ã«æ›¸ã‘るよã†ã«ãªã‚Šã¾ã™ã€‚ ã“ã“ã§ã¯ã€éžåŒ…å«ã‚ªãƒšãƒ¬ãƒ¼ã‚¿ã¨ã¯ä½•ã‹ã€ã¾ãŸä»Šå¾Œã®è¦‹é€šã—ãªã©ã«ã¤ã„ã¦èª¬æ˜Žã—ã¾ã™ã€‚ éžåŒ…å«ã‚ªãƒšãƒ¬ãƒ¼ã‚¿ã¨ã¯ï¼Ÿ éžåŒ…å«ã‚ªãƒšãƒ¬ãƒ¼ã‚¿ã¯ç”°ä¸ã•ã‚“ãŒç´„ 9 å¹´å‰ã«ç™ºè¡¨ã•ã‚ŒãŸã€æ£è¦è¡¨ç¾ã®æ‹¡å¼µã§ã™ã€‚ç†è«–的背景ã¨å®Ÿè£…例ã¯ä»¥ä¸‹ã®ã‚¹ãƒ©ã‚¤ãƒ‰ã¨è«–æ–‡ã«ç¤ºã•ã‚Œã¦ã„ã¾ã™ã€‚ æ£è¦è¡¨ç¾ã«ãŠã‘ã‚‹éžåŒ…å«ã‚ªãƒšãƒ¬ãƒ¼ã‚¿ã®æ案 Absent Operator for Regular Expression 従æ¥ã®æ£è¦è¡¨ç¾ã§ã¯ã€ã€Œç‰¹å®šã®æ–‡å—以外㮠1 æ–‡å—ã«ãƒžãƒƒãƒã™ã‚‹æ£è¦è¡¨ç¾ã€ã¯æ–‡å—クラスã®å¦å®šã‚’使ã£ã¦ [^x] ã®ã‚ˆã†ã«æ›¸ãã“ã¨ãŒã§ãã¾ã™ãŒã€ãã‚Œã«å¯¾ã—ã¦ã€Œç‰¹å®šã®æ–‡å—列をå«ã¾ãªã„æ–‡å—列ã«ãƒžãƒƒãƒã™ã‚‹æ£è¦è¡¨ç¾ã€ã¯ç°¡å˜ã«æ›¸ãã“ã¨ã¯ã§ãã¾ã›ã‚“
Atom Flight Manual
AI & MLLearn about artificial intelligence and machine learning across the GitHub ecosystem and the wider industry. Generative AILearn how to build with generative AI. GitHub CopilotChange how you work with GitHub Copilot. LLMsEverything developers need to know about LLMs. Machine learningMachine learning tips, tricks, and best practices. How AI code generation worksExplore the capabilities and be
regex101: build, test, and debug regex
An explanation of your regex will be automatically generated as you type.
Unicode property escapes in JavaScript regular expressions · Mathias Bynens
ES2018 adds support for Unicode property escapes of the form \p{…} and \P{…} to JavaScript regular expressions. This article explains what Unicode property escapes are, how they work, and why they’re useful. Introduction The Unicode Standard assigns various properties and property values to every symbol. For example, to get the set of symbols that are used in the Greek script, search the Unicode d
æ£è¦è¡¨ç¾ã‹ã‚‰LLVMã¸ã®ã‚³ãƒ³ãƒ‘イラを実装ã™ã‚‹ - Qiita
æ£è¦è¡¨ç¾æŠ€è¡“入門ã¨ã„ã†æœ¬ã®ä¸ã«ã€æ£è¦è¡¨ç¾ã®JITコンパイルã¨ã„ã†æŠ€è¡“ãŒç´¹ä»‹ã•ã‚Œã¦ã„る。VMåž‹ã®æ£è¦è¡¨ç¾ã‚¨ãƒ³ã‚¸ãƒ³ã¯ä»¥å‰ä½œã£ãŸ1ã®ã§ã€ã“れをLLVMã¸ã‚³ãƒ³ãƒ‘イルã™ã‚Œã°ãŠã‚‚ã—ã‚ã„ã®ã§ã¯ãªã„ã‹ã¨è€ƒãˆã¦ã€å®Ÿè¡Œã™ã‚‹ã“ã¨ã«ã—ãŸã€‚ãªãŠã€å®Ÿè£…ã«ã¯Scalaを用ã„ãŸã€‚ 追記： ã¾ãŸã€JVMã®ãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã¸JITコンパイルã™ã‚‹å®Ÿé¨“も書ãã¾ã—ãŸã€‚ æ£è¦è¡¨ç¾ã®JITコンパイラを実装ã™ã‚‹ æ£è¦è¡¨ç¾ã®æŠ½è±¡æ§‹æ–‡æœ¨ VMã®å®Ÿè£…ã®æ™‚ã«ç”¨ã„ãŸã‚‚ã®ã¨åŒã˜ãã€æ¬¡ã®ãƒ‡ãƒ¼ã‚¿æ§‹é€ を用ã„る。 sealed trait Regex case object Empty extends Regex case class Let(c: Char) extends Regex case class Con(a: Regex, b: Regex) extends Regex case class Alt(a: Regex, b: Regex) ext
ReDoS - Wikipedia
A regular expression denial of service (ReDoS)[1] is an algorithmic complexity attack that produces a denial-of-service by providing a regular expression and/or an input that takes a long time to evaluate. The attack exploits the fact that many[2] regular expression implementations have super-linear worst-case complexity; on certain regex-input pairs, the time taken can grow polynomially or expone
New regular expression features in ECMAScript 6
RegExp.prototype.exec(str)Â Â # If /g is not set, matching always starts at the beginning, but skips ahead until a match is found. REGEX.lastIndex is not changed. const REGEX = /a/; REGEX.lastIndex = 7; // ignored const match = REGEX.exec('xaxa'); console.log(match.index); // 1 console.log(REGEX.lastIndex); // 7 (unchanged) If /g is set, matching starts at REGEX.lastIndex and skips ahead until a mat
PHPã®PCRE関数ã§ã®\Q,\Eã¯Perlã¨åŒä¸€ã§ã¯ãªã„ - hnwã®æ—¥è¨˜
Perlæ£è¦è¡¨ç¾ã§åˆ©ç”¨ã§ãる便利ãªã‚¨ã‚¹ã‚±ãƒ¼ãƒ—シーケンスã¨ã—ã¦ã€\Qã¨\EãŒã‚ã‚Šã¾ã™ã€‚ã“ã‚Œã¯ãƒ¡ã‚¿æ–‡å—ã®è§£é‡ˆã‚’æ¢ã‚ãŸã‚Šã€ãã®è§£é‡ˆã‚’å†é–‹ã—ãŸã‚Šã™ã‚‹ã‚‚ã®ã§ã™ã€‚「man perlreã€ã«ã¯æ¬¡ã®ã‚ˆã†ãªä¾‹ãŒå‡ºã¦ãã¾ã™ã€‚ /$unquoted\Q$quoted\E$unquoted/ ã“ã®æ£è¦è¡¨ç¾ã¯å¤‰æ•°$unquotedã¨$quotedã®å€¤ã‚’利用ã—ã¾ã™ãŒã€åˆ©ç”¨ã®ã•ã‚Œã‹ãŸãŒç•°ãªã‚Šã¾ã™ã€‚$unquotedã®å€¤ã¯ãã®ã¾ã¾æ£è¦è¡¨ç¾ã¨ã—ã¦è§£é‡ˆã•ã‚Œã¾ã™ãŒã€$quotedã®å€¤ã¯æ–‡å—列一致ã¨ãªã‚Šã¾ã™ã€‚ #!/usr/bin/perl -w use strict; use Data::Dumper; my $quoted = '.?'; my $unquoted = '.'; my $subject = "a.?a"; print $subject =~ /^$unquoted\Q$quoted\E$unquoted$/;
メールアドレスã®æ£è¦è¡¨ç¾ - kiyohoge
ã‚ãã¾ã§ã‚‚簡易。 ãƒãƒ¼ã‚«ãƒ«éƒ¨ã®quoted-stringやドメイン部ãŒã€Œ[ ]ã€ã«å›²ã¾ã‚ŒãŸIPã‚¢ãƒ‰ãƒ¬ã‚¹ã® å ´åˆã«ã¯å¯¾å¿œã—ã¦ã„ãªã„。 日本ã®æºå¸¯é›»è©±ã®ä½¿ç”¨ã«æ²¿ã£ã¦ãªã„（ãƒãƒ¼ã‚«ãƒ«éƒ¨ã«ãƒ‰ãƒƒãƒˆãŒç¶šã）表ç¾ã«ã¯å¯¾å¿œã€‚ ã‚ã¨ãªã‚“ã¨ãªãドメイン部ã«ã¯ä¸€å›žã¯ãƒ‰ãƒƒãƒˆãŒç„¡ãã¦ã¯é§„ç›®ã«ã—ã¦ã‚る。 /[a-zA-Z0-9_!#$%&'*+/=?^`{}~|\\\-][a-zA-Z0-9_!#$%&'*+/=?^`{}~|\\\-.]*@[a-zA-Z0-9](?:[a-zA-Z0-9\\-]*[a-zA-Z0-9])*(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9\\-]*[a-zA-Z0-9])*)+/
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s?https?://[-_.!~*'()a-zA-Z0-9;/?:@&=+$,%#]+ Perlメモ ã®æ–‡å—クラス部ã®ç¯„囲ãŒé‡è¤‡ã—ã¦ã„ãŸã®ã§ã€é‡è¤‡ã‚’除去ã—ã¦çŸãã—ã¦ãれる関数を書ã„ãŸã€‚ASCIIã®ç¯„囲ã®ã¿å¯¾å¿œã€‚ function optimize(range) { var ascii = new Array(0x7f); var i, begin, end; var result = ""; for (i = 0x00; i < ascii.length; ++i) ascii[i] = false; for (i = 0; i < range.length; ++i) { begin = range.charCodeAt(i); if (range.charAt(i+1) == "-") end = range.charCodeAt(i += 2); else end = begin;
Enjoy×Study - JavaScriptã®æ£è¦è¡¨ç¾ã§ã€ãƒ¡ã‚¿æ–‡å—ã®"\s","\d"ã¯ã‚¯ãƒã‚¹ãƒ–ラウザã§ã®äº’æ›æ€§ãŒç„¡ã„。
æ£è¦è¡¨ç¾ã§"\d"ã¯ã€"[0-9]"ã¨ä¸€ç·’ã ã¨ãšã£ã¨æ€ã£ã¦ã„ã¾ã—ãŸãŒã€FireFoxã§ã¯å…¨è§’æ•°å—もマッãƒã—ã¾ã™ã€‚(FireFox1.5.0.4ã§ç¢ºèª) /\d/.test('1') // =>true /\d/.test('１') // =>trueã¡ãªã¿ã«IE 6ã€Opera 9ã§ã¯ã€"/\d/.test('１')"ã¯falseã¨ãªã‚Šã¾ã™ã€‚ æ°—ã«ãªã£ãŸã®ã§ã€"\s"ã€"\w"ã«ã¤ã„ã¦ã‚‚調ã¹ã¦ã¿ãŸã¨ã“ã‚ã€ä¸‹è¨˜ã®ã‚ˆã†ãªçµæžœã«ãªã‚Šã¾ã—ãŸã€‚ パターンFireFox 1.5,2.0IE 6, 7Opera 9 /\s/.test(' ') // åŠè§’truetruetrue /\s/.test('　') // 全角truefalsetrue /\d/.test('1') // åŠè§’truetruetrue /\d/.test('１') // 全角truefalsefalse /\w/.test('
JavaScript Regex Syntax Highlighter
Current version: 0.1 (2010-07-04). License: MIT. Do you want RegexPal-style regex syntax highlighting on your webpages? This library takes care of it for you, so you can spend more time writing powerful regular expressions and less time deciphering them. Currently, JavaScript regexes only are supported. Any regex features not supported by JavaScript are marked as errors, along with some edge cases
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Regulex：JavaScript Regular Expression Visualizer
Rubular: a Ruby regular expression editor and tester
Amazon.co.jp: æ£è¦è¡¨ç¾ã‚¯ãƒƒã‚¯ãƒ–ック: Jan Goyvaerts (è‘—), Steven Levithan (è‘—), 長尾高弘 (翻訳): 本
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