Why Regular Expression “Does Not Exist” Tests are Convoluted

In order to perform a “does not exist” test in a regular expression, you have to leverage negative lookaheads (negative lookarounds), if your flavor of regular expressions supports them: http://stackoverflow.com/questions/406230/regular-expression-to-match-string-not-containing-a-word Although this expression seems to works in RegEx Buddy’s .Net evaluation mode, it actually does NOT in production .Net code (call to RegEx.IsMatch) : C# … Read moreWhy Regular Expression “Does Not Exist” Tests are Convoluted

Regular Expression Resources

Books “Mastering Regular Expressions” O’Reilly, 2006. Jeffrey Friedl “Regular Expressions Cookbook” O’Reilly,  2009, 2012. Jan Goyvaerts, Steven Levithan Cheat Sheets http://www.cheatography.com/davechild/cheat-sheets/regular-expressions/ http://opencompany.org/download/regex-cheatsheet.pdf Roblox HackBigo Live Beans HackYUGIOH DUEL LINKS HACKPokemon Duel HackRoblox HackPixel Gun 3d HackGrowtopia HackClash Royale Hackmy cafe recipes stories hackMobile Legends HackMobile Strike Hack Online References http://www.regular-expressions.info/ http://msdn.microsoft.com/en-us/library/az24scfc.aspx How Do You Debug a … Read moreRegular Expression Resources

RegEx Buddy

http://www.regexbuddy.com/ By far the BEST regular expression design and test tool out there. Written by Jan Goyvaerts, co-author of the O’Reilly book, “Regular Expressions Cookbook.” Reasonably priced, liberal license (pay once per developer, use anywhere). During a requirements meeting, a business analyst hands me a code fragment. Doesn’t understand what it does, but says we … Read moreRegEx Buddy