in reply to
Regular Expression Builder
Komodo from ActiveState includes a regular expression toolkit that allows you to see what a regex does as you have it, on a sample output.
I know this is not exactly what you are looking for but it might be helpful...
Computer science is merely the post-Turing decline of formal systems theory.
A foolish day
Just another day
Internet cleaning day
The real first day of Spring
The real first day of Autumn
Wait a second, ... is this poll a joke?
Results (472 votes),