RegExr: Learn, Build, & Test RegEx
RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp). Supports JavaScript & PHP/PCRE RegEx. Results update in real-time as you type. Roll over a match or expression for details. Validate patterns with suites of Tests. Save & share expressions with others. Use Tools to explore your results. Full RegEx Reference with help & examples. Undo & Redo with {{getCtrlKey()}}
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タイトル変ãˆã¾ã—ãŸã€‚旧タイトル「JavaScriptã§ã‚ˆã使ã†æ›¸ãæ–¹ã€ã€‚よã使ã†ã‘ã©æ¯Žå›žå¿˜ã‚Œã‚‹ã€‚ æ£è¦è¡¨ç¾ã«ãƒžãƒƒãƒã™ã‚‹ã‹ã©ã†ã‹ã€‚ RegExp#testを使ã†ã€‚ /abc/.test("abcdefg") // => true String#searchã¯ãƒžãƒƒãƒã—ãŸä½ç½®ã‚’è¿”ã™ã€‚マッãƒã—ãªã„å ´åˆã¯-1。先é ã«ãƒžãƒƒãƒã™ã‚‹ã¨0ã§falseãªã®ã§æ³¨æ„。真å½å€¤ãŒæ¬²ã—ã„å ´åˆã¯String#searchを使ã‚ãªã„。 "abcdefg".search(/xxx/) // => -1 "abcdefg".search(/def/) // => 3 "abcdefg".search(/abc/) == false // => true æ£è¦è¡¨ç¾ã®éƒ¨åˆ†ãƒžãƒƒãƒã‚’得る。 部分マッãƒã‚’å¾—ã‚‹ã«ã¯ã€RegExp#execã‹String#matchを使ã†ã€‚execã¨matchã®é€Ÿåº¦ã¯å¤§ã—ã¦å¤‰ã‚らãªã„。 æ£è¦è¡¨ç¾ã®ãƒ™ãƒ³ãƒãƒžãƒ¼
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