[B! JavaScript][regexp] terurouã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

terurou id:terurou

JavaScriptã¨regexpã«é–¢ã™ã‚‹terurouã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (6)

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

${{author_name}}$
{{author_name}}{{created}}
{{ #comment }}{{ comment }}{{ /comment }}
- {{ label }}

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

JavaScriptã§ã€è¤‡æ•°ã®æ£è¦è¡¨ç¾ã®ã©ã®ãƒ‘ã‚¿ãƒ¼ãƒ³ã«ãƒžãƒƒãƒã™ã‚‹ã‹ã‚’ switch ã§æ›¸ã - è‘‰ã£ã±æ—¥è¨˜
JavaScriptã§ switch( s.match( ... ) ){ case /abcd/ : break; case /defg/ : break; } ã¿ãŸã„ã«ã€æ–‡å—åˆ— s ãŒè¤‡æ•°ã®æ£è¦è¡¨ç¾ã®ã©ã®ãƒ‘ã‚¿ãƒ¼ãƒ³ã¨ä¸€è‡´ã™ã‚‹ã®ã‹ã‚’ switch æ–‡ã§ã‚ã‹ã‚Šã‚„ã™ãæ›¸ãæ–¹æ³•ã‚’è€ƒãˆã¦ã„ã¦ã€ä¸€è‡´ã—ãŸãƒ‘ã‚¿ãƒ¼ãƒ³ã®è¦‹ãŸç›®ã®åˆ†ã‹ã‚Šã‚„ã™ã•ã‚‚è€ƒãˆã‚‹ã¨ã€if ã®ç¾…åˆ—ã—ã‹ãªã„ã®ã‹ãªãã¨æ€ã£ã¦ã„ãŸã‘ã©ã€ã“ã‚“ãªæ„Ÿã˜ã§ã‚ˆã•ãã†ãªã®ã§ã€å¿˜ã‚Œãªã„ã‚ˆã†ãƒ¡ãƒ¢ã€‚ switch( true ){ case /abcd/.test( s ) : break; case /defg/.test( s ) : break; } switch ã®æ¡ä»¶ãŒ true ã¨ã‹ã‚ãƒ¢ã„ã‘ã©ã€‚
terurou 2013/05/29
ã“ã®æ›¸ãæ–¹çŸ¥ã‚‰ã‚“ã‹ã£ãŸã€ã‚ãƒ¢ã‚¤

JavaScript

regexp

BadKnowhow
ãƒªãƒ³ã‚¯
æ£è¦è¡¨ç¾ã®ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯(String.match ã¨ RegExp.exec ã®ã–ã£ãã‚Šã¨ã—ãŸé•ã„) - latest log
2009-01-12è¿½è¨˜ ã‚¿ã‚¤ãƒˆãƒ«ä¿®æ£ã—ã¾ã—ãŸã€‚ 2009-01-14è¿½è¨˜ String.indexOf ã¨ RegExp.test ã®ã‚¹ã‚³ã‚¢ãŒé€†ã«æ›¸ã‹ã‚Œã¦ã¦ã„ãŸã®ã‚’ä¿®æ£ã—ã¾ã—ãŸã€‚ String.match ã°ã‹ã‚Šã§ã€RegExp.exec ã‚’ä½¿ã£ãŸã“ã¨ãŒã‚ã‚Šã¾ã›ã‚“ã§ã—ãŸã€‚ ã¡ã‚‡ã£ã¨æ°—ã«ãªã£ãŸã®ã§è‰²ã€…ã¨ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ã‚’å–ã£ã¦ã¿ã¾ã—ãŸã€‚ TEST TIMES IE6 Fx3.0 Fx3.1 (JIT) Safari3 Chrome1 (JIT) A. match(/\s*/) vs match(/ */) "aaaaaaaaaaaa".match(/\s*aa\s*/) 1000000 7203 1714 327 2375 2128 "aaaaaaaaaaaa".match(/ *aa */) 1000000 7156 1638 297 2328 2148 B. RegExp.exec vs
terurou 2009/01/27
javascript

regexp

performance
ãƒªãƒ³ã‚¯
Narcissus ã®æ£è¦è¡¨ç¾: Days on the Moon
ã€Œå‰ã®ã‚¨ãƒ³ãƒˆãƒªã§æ›¸ãå¿˜ã‚Œã¦ãŸ - æœ€é€Ÿãƒãƒ¥ãƒ‘ã‚«ãƒ–ãƒ©ç ”ç©¶ä¼šã€ã«ã¦ã€Narcissus ã§ä½¿ã‚ã‚Œã¦ã„ã‚‹æ£è¦è¡¨ç¾ãŒå‚è€ƒã«ãªã‚‹ã¨ã„ã†è©±ãŒå‡ºã¦ã„ã¾ã™ã€‚ æ–‡å—åˆ—ãƒªãƒ†ãƒ©ãƒ« /^"(?:\\.|[^"])*"|^'(?:[^']|\\.)*'/ æ£è¦è¡¨ç¾ãƒªãƒ†ãƒ©ãƒ« /^\/((?:\\.|[^\/])+)\/([gimy]*)/ ã‚³ãƒ¡ãƒ³ãƒˆ /^\/(?:\*(?:.|\n)*?\*\/|\/.*)/ ä¸€æµã®äººãŒæ›¸ã„ãŸã‚‚ã®ã‚’ä½¿ã„ã¾ã—ã‚‡ã†ã¨ã„ã†ã®ã«ç•°ã‚’å”±ãˆã‚‹ã¤ã‚‚ã‚Šã¯ã‚ã‚Šã¾ã›ã‚“ãŒã€ãã®ã¾ã¾ã‚³ãƒ”ãƒ¼ & ãƒšãƒ¼ã‚¹ãƒˆã—ã¦ã„ã¦ã¯æ„å‘³ãŒã‚ã‚Šã¾ã›ã‚“ã€‚ã“ã“ã¯ã‚„ã¯ã‚Šä¸€æ–‡å—ä¸€æ–‡å—å¿ƒã‚’ã“ã‚ã¦å†™çµŒã—ã¾ã—ã‚‡ã†â€¦â€¦ã§ã¯ãªãã€ã©ã†ã—ã¦ãã®æ›¸ãæ–¹ã§ã†ã¾ãã„ãã®ã‹ã‚’ãã¡ã‚“ã¨è€ƒãˆãŸä¸Šã§ä½¿ã„ã¾ã—ã‚‡ã†ã€‚ æ–‡å—åˆ—ãƒªãƒ†ãƒ©ãƒ«ã«ãƒžãƒƒãƒã™ã‚‹æ£è¦è¡¨ç¾ ä¸Šè¨˜ã®æ–‡å—åˆ—ãƒªãƒ†ãƒ©ãƒ«ã‚’è¡¨ã™æ£è¦è¡¨ç¾ã‹ã‚‰ã€ä¸€é‡å¼•ç”¨ç¬¦ã§ããã‚‰ã‚ŒãŸæ–‡å—åˆ—ã«ãƒžãƒƒãƒã™ã‚‹éƒ¨åˆ†ã ã‘ã‚’æŠœãå‡ºã™ã¨ '(?:[^
terurou 2008/05/23
Narcissus ã®æ£è¦è¡¨ç¾ã®è§£èª¬ã€‚

javascript

regexp
ãƒªãƒ³ã‚¯
æ£è¦è¡¨ç¾ã® XPath å—å¥è§£æžãã®ï¼’ - ITæˆ¦è¨˜
ã¾ãŸã¾ãŸ XPath ãƒã‚¿ã§ã™ã€‚ å…ˆæ—¥ã€XPath ã®å—å¥è§£æžã‚’ãƒ¯ãƒ³ãƒ©ã‚¤ãƒŠãƒ¼ã§ä½œã£ã¦ã¿ãŸã€‚ - ITæˆ¦è¨˜ã§æ›¸ã„ãŸæ£è¦è¡¨ç¾ã® XPath å—å¥è§£æžã§ã™ãŒã€ã‚ˆãè€ƒãˆã‚‹ã¨ã„ã‚ã„ã‚ãŠã‹ã—ã‹ã£ãŸï¼ˆä¸æ£ãªæ–‡å—ãŒç„¡è¦–ã•ã‚ŒãŸã‚Šã™ã‚‹ï¼‰ï¼† id:otsune ã•ã‚“ã‹ã‚‰ã‚³ãƒ¡ãƒ³ãƒˆã‚„ãƒ–ã‚¯ãƒžã®çªã£è¾¼ã¿ã‚‚ã‚ã‚Šã¾ã—ã¦ã€ï¼‘ã‹ã‚‰æ£è¦è¡¨ç¾ã‚’å‹‰å¼·ã—ã¦ã‹ã‚‰æ–°ã—ãæ›¸ãç›´ã™ã“ã¨ã«ã—ã¾ã—ãŸã€‚ æ£è¦è¡¨ç¾ã®å‹‰å¼·æ–¹æ³• ä»¥ä¸‹ã®äºŒã¤ã®æ–¹æ³•ã§å‹‰å¼·ã—ã¾ã—ãŸã€‚ 1.SpiderMonkey ã®æ£è¦è¡¨ç¾ãƒ‡ãƒãƒƒã‚°ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã‚’ä½¿ã† SpiderMonkey ã‚’ãƒ“ãƒ«ãƒ‰ã™ã‚‹ã¨ãã«ã€ä»¥ä¸‹ã®ãƒ•ãƒ©ã‚°ã‚’ä»˜ã‘ã¦ãƒ“ãƒ«ãƒ‰ã—ã¾ã™ã€‚ $ make -f Makefile.ref "DEFINES=-DREGEXP_DEBUG -DDEBUG"ã“ã†ã™ã‚‹ã¨æ£è¦è¡¨ç¾ãŒã©ã†ã„ã†é¢¨ã«å®Ÿè¡Œã•ã‚ŒãŸã‹ã‚’èª¿ã¹ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ ã“ã‚“ãªæ„Ÿã˜ $ js js> 'foobar'.match(/o+/)
terurou 2007/08/31
javascript

regexp

xml

xpath

amachang
ãƒªãƒ³ã‚¯
ITæˆ¦è¨˜ - JavaScript ã§æ•°å¼ãƒ‘ãƒ¼ã‚µã‚’æ›¸ã„ã¦ã¿ãŸã€‚
èƒŒæ™¯ ã„ã¾ã¾ã§ã€ã¡ã‚ƒã‚“ã¨ãƒ‘ãƒ¼ã‚µã¨ã„ã†ã‚‚ã®ã‚’æ›¸ã„ãŸã“ã¨ãŒãªã‹ã£ãŸã®ã§å‹‰å¼·ã®ãŸã‚ã«ã‚¢ãƒ¬ã‚³ãƒ¬è€ƒãˆãªãŒã‚‰ã‚„ã£ã¦ã¿ã‚ˆã†ã¨æ€ã£ã¦ã€ç°¡å˜ãªæ•°å¼ã‚’æœ¨ã«ã™ã‚‹ãƒ‘ãƒ¼ã‚µã‚’æ›¸ã„ã¦ã¿ã‚ˆã†ã¨æ€ã£ãŸã®ã§ã™ï¼žï¼œ ä»Šå›žä½œã‚‹ãƒ‘ãƒ¼ã‚µã®ä»•æ§˜ ãƒ‘ãƒ¼ã‚¹ã™ã‚‹æ•°å¼ã®æ¼”ç®—åã¯äºŒé …æ¼”ç®—å + - * / ã¨å˜é …æ¼”ç®—å + - ã ã‘ã€‚ æ‹¬å¼§ã¨ã‹ã¯ä½¿ã‚ãªã„ã€‚ æ¼”ç®—ã®å„ªå…ˆé †ä½ã¯ * / ã®ã»ã†ãŒ + - ã‚ˆã‚Šé«˜ã„ã€‚ã¤ã¾ã‚Šã€ 1 + 1 * 1 ã¯ 1 + (1 * 1) å˜é …æ¼”ç®—åã¯äºŒé …æ¼”ç®—åã‚ˆã‚Šå„ªå…ˆé †ä½ãŒé«˜ã„ã€‚ã¤ã¾ã‚Šã€ - 1 + 1 ã¯ (-1) + 1 ã§ã€ä½œã£ã¦ã¿ãŸï¼ ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ filter é–¢æ•°ã¨ã‹ä½¿ã£ã¦ã‚‹ã®ã§ã€ Firefox only ã§ã™ã€‚ var parse = function(source) { var tokens = source.match(/[-+*/]|[^-+*/\s]+|\s+/g).filter(/^[^\
terurou 2007/08/30
æ£è¦è¡¨ç¾ã§æ•°å¼ãƒ‘ãƒ¼ã‚µã€‚

javascript

perser

amachang

regexp

compiler
ãƒªãƒ³ã‚¯
ITæˆ¦è¨˜ - XPath ã®å—å¥è§£æžã‚’ãƒ¯ãƒ³ãƒ©ã‚¤ãƒŠãƒ¼ã§ä½œã£ã¦ã¿ãŸã€‚
ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ var expression = '/html/body/div/[attribute::class="hoge fuga piyo"]'; var tokens = expression.match(/"[^"]*"|'[^']*'|\d+(?:\.\d*)?|\.\d+|\*|\/\/|\/|\||\+|!=|<=|>=|<|>|=|$|$|\[|\]|\.\.|\.|@|,|::|-|(?![0-9-:])[\w-]+:\*|\$(?:(?![0-9-:])[\w-]+:)?(?![0-9-:])[\w-]+|(?:(?![0-9-:])[\w-]+:)?(?![0-9-:])[\w-]+|\s+/g); // tokens is ["/", "html", "/", "body", "/", "div", "/", "[", "attribute", "::",
terurou 2007/08/29
æ£è¦è¡¨ç¾ã§XPathã€‚ç¢ºã‹ã«ã“ã®æ£è¦è¡¨ç¾ã‚’èªã‚€æ°—ã¯èµ·ãã¾ã›ã‚“ãªâ€¦ã€‚

javascript

regexp

xml

xpath

amachang
ãƒªãƒ³ã‚¯
1