Regular Expressions – you either love them or hate them, and usually when you hate them, you just haven’t spent enough time trying to learn them! :)
They are incredibly useful, but they can often be difficult to build and test. I have previously mentioned a great tool called RegexBuddy, which is a great help.
However, being a Windows application, you might not always have your PC with it installed around. I’ve often found myself stranded, looking for a quick way to write and test a regex.
The obvious solution – a web-based one
The solution to the problem posed by not having a regex tool with you is to make a regex tool which is always (or at least most of the time) accessible… Thus make it a web application!
Because it’s solely JS based, it’s also faster than doing round-trips to the server to fetch results with Ajax or such, so it’s nicer to use.