Matching digits surrounded by non-digits lazily?

Hi, I'm trying to write a RegEx that will match 6 or 7
adjacent digits
surrounded by non-digits, lazily.

I currently have:

\D\d{6,7}\D

Which will match, for example "-123456*", but I
want it to match but
NOT capture the non-digits. I tried:

\D?\d{6,7}\D?

to make the non-digits optional, but this didn't work.

My ideal RegEx will return the following matches:

1234567
123456

from (for example):

Blah 1234567* blah123456) 12345 blah 12345678()blah

So that only the 6 or 7 digits are captured, and only if the
6 or 7
digits are surrounded immediately by non-digits.

Hope someone can point me in the right direction!

Plankmeister.


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The Plankmeister ha scritto:
[ CUT ]
> I currently have:
>
> \D\d{6,7}\D
>
> Which will match, for example "-123456*",
but I want it to match but
> NOT capture the non-digits.
[ CUT ]

You must use the lookahead and lookbehind assertions
Modify your regexp wuith this
(?<=\D)\d{6,7}(?=\D)


--
Andrea


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