Quoting Always Learning (from 24/04/10 15:36):
> Jim Cheetham wrote on Sat, 24 Apr 2010 15:18:31 +1200.
>> "[a](1)" means the same as "a", etc.
>
> But doesn't [a] mean one or more 'a' whereas [a](1) mean only one 'a' ?
The canonical book can be found at
http://regex.info/. And google should
be able to locate a beginners tutorial that you will like. This isn't
quite the right list for teaching how to use regexps.
But, "no". '[a]' means basically the same thing as just 'a'.
'[a][d][s][l]' means the same as 'adsl'. If a group has only one member,
there is usually no point in making it into a group at all.
-jim
