What's wrong with this expression?

J. Allen Day wrote:
> "ZOLTAN" <zoltan.josegmail.com> wrote:
> >
> >
> >Hi,
> >    I am quite a newbie in the magnificent world of
Regular Expressions
> >but I'm already hooked! Can someone please suggest
t me what's wrong
> >with this regex?
>
> In this case, your problem is that you don't have a
quantifier after that
> last character class before the closed parenthesis, so
it's only looking
> for 2 characters after the dot.
>
> www(\.[a-z][a-z0-9]+)+\.[a-z]+
>
> That simple change and it will match all the domains,
but naturally nothing
> after.
>
> See her in action: http://tinyurl.com/eb7r5
>
> Allen
>
> --
> Remember, no matter where you go, there you are.
-Buckaroo Banzai
> Online Regex find/repalce utility: http://rereplace.com
> Command-based online image editor: http://theprawn.com/imag
iine

Hi Allen,
    I was just trying out on my own and got this one to work
:

$ egrep -i '(http://)?(www)?(\.[a-z][a-z0-9]*)+\.[a-z]+'
testfile

This works great for all domain types.... But I still have
one query
yet :

When I tried using this :

$ egrep -i
'(http://)?(www)?(\.[a-z][a-z0-9]*)+\.[a-z]{2,4)'
testfile

where I am using the {min,max) format to ensure that the
final domain
suffix is between 2 and 4 characters, there was no output.
Is this
feature not supported in egrep 2.5.1? If so, how do I ensure
this to be
enforced using egrep?

And thanks a lot for the pointer. Truly appreciated.

Regards,

Timmy Jose.


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