"Mastering Regular expressions" book

[Meitnik at aol.com]

Hi,

I am wondering if the code and teaching of regrep in this book can be done 
fully with the regrep support in rr 2.5beta? What limits or points would I have 
problems with? I need to know before a friend of mine who whats to buy the 
book for me as a gift to help me with my project and dont want to waste his funds 
if the book wont help me much with RR. 

Thanks :)
Andrew