Regexes: the Bad, the Better, and the Best
A Story about How Just a Few Characters Can Make Such a Big Difference in Performance Regular expressions are incantations that we developers wield mightily when the time calls. Yet, do we always wield them deftly? Regular expressions are a delicate and precise language. They are crafted with careful deliberation into powerful forces that level text like a perfectly thrown bowling ball, knocking o
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regex101: build, test, and debug regex
An explanation of your regex will be automatically generated as you type.
RegViz: Visual Debugging of Regular Expressions
^ / $ line beginning / ending \b word border position \B in-word position (?=x) lookahead if x comes next . any character \d / \D digit / any other \s / \S whitespace / any other \w / \W alpha-numeric / any other [ab] any character a or b [^ab] any character but a and b About the Project RegViz is a tool for debugging JavaScript regular expressions in a visual way. The goal of the project is to cr
æ£è¦è¡¨ç¾ã‚’ã‚ã‹ã‚Šã‚„ã™ã視覚化ã—ã¦ãれる『REGEXPER〠| 100SHIKI
ãŠã£ã¨ã€ã“ã‚Œã¯ä¾¿åˆ©ã‹ã‚‚。 REGEXPERを使ãˆã°ã€JavaScriptã®æ£è¦è¡¨ç¾ã‚’ã‚ã‹ã‚Šã‚„ã™ã表ç¾ã—ã¦ãれる。 一見ã€é›£è§£ãªæ£è¦è¡¨ç¾ã ãŒã€ã“れを通ã—ã¦ã‚‚見るã¨ã€Œãªã‚‹ã»ã©ã€ã“ã®æ–‡å—ã¨ã“ã®æ–‡å—ã«ã¯ã•ã‚Œã¾ã‚Œã¦ã„ã¦ã€ã“ã®é–“ã¯ä½•ã®æ–‡å—ã§ã‚‚良ã„ã®ã ãªã€ã¨ã„ã£ãŸã“ã¨ãŒã‚ã‹ã‚‹ã‚ˆã†ã«ãªã‚‹ã€‚ ä»–ã®äººã®ã‚³ãƒ¼ãƒ‰ã‚’èªã‚“ã§ã„ã¦ã€Œï¼Ÿã€ã¨ãªã£ãŸã¨ãã«è©¦ã—ã¦ã¿ã¦ã‚‚ã„ã„ã‹ã‚‚ã§ã™ãªã€‚
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