I use RegexBuddy while working with regular expressions. From its library I copied the regular expression to match URLs. I tested successfully within RegexBuddy. However, when I copied it as Java S...

RegexBuddy on the tab "Debug" shows how regular expressions are executed step by step. But what exactly that steps mean? What operations are behind every step?

NSRegularExpression says its flavor of regex is "ICU." I have RegexBuddy, which supports a bunch of different flavors, but none of them calls itself "ICU." But is one of them ICU under another name...

I'm borrowing a rather complex regex from some PHP Textile implementations (open source, properly attributed) for a simple, not quite feature complete Java implementation, textile4j, that I'm porti...

I have built a match pattern in RegexBuddy which behaves exactly as I expect. But I cannot transfer this to Delphi XE, at least when using the latest built in TRegEx or TPerlRegEx. My real world c...

Which regular expression engine does Java uses? In a tool like RegexBuddy if I use [a-z&&[^bc]] that expression in Java is good but in RegexBuddy it has not been understood. In fact it...

I have been banging my head against this for some time now: I want to capture all [a-z]+[0-9]? character sequences excluding strings such as sin|cos|tan etc. So having done my regex homework the fo...

Ok, so I'm an idiot. So I was working on a regex that took way to long to craft. After perfecting it, I upgraded my work machine with a blazing fast hard drive and realized that I never saved the...