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