regular expression

[Christine Mayer]

Hi,

I need a regular expression - it should:

Allow all Strings that do not begin with "car_"

Examples - ok would be:
car
carwash
1
a
1234
abcdefgh
a1b2

not ok was:
car_
car_1
car_a
car_1234
car_abcdefgh
car_a1b2

On Google, I basically found the expression:
..*(?<!car_)wash

On its basis, I build:
(?<!car_)[0-9A-Za-z_+\-]+

However, it doesn't work as required - I guess, because the String
that follows
defined by "0-9A-Za-z_+\-" could be "car_" too! In other words, this
rule says
Don't start the String with "car_" but after that you may write car_ -
so the String MAY begin with car_

Any idea how to fix that?

Thx,

Christine

 

[Gordon Beaton]

I need a regular expression - it should:

Allow all Strings that do not begin with "car_"

e.g.

"^(?!car_)[a-zA-Z0-9_+-]*"

/gordon

--

 

[Christian]

I need a regular expression - it should:

Allow all Strings that do not begin with "car_"

e.g.

"^(?!car_)[a-zA-Z0-9_+-]*"

/gordon

though that won't match if the string contains a linefeed..

 

[Gordon Beaton]

though that won't match if the string contains a linefeed..

It won't make coffee either, but the original poster didn't ask for
either of those things.

/gordon

--

 

[Piotr Kobzda]

I need a regular expression - it should:

Allow all Strings that do not begin with "car_"

Why reqex for that?

!s.startsWith("car_")


piotr

 

[Ingo Menger]

Hi,

I need a regular expression - it should:

Allow all Strings that do not begin with "car_" [stuff deleted]
Any idea how to fix that?

Sometimes it is possible to reformulate the problem:

"For all strings that do not begin with 'car_' do X"
==>
"For all strings do if it begins with 'car_' then nothing else X"

 

[Christine Mayer]

Why reqex for that?

!s.startsWith("car_")

piotr

Because I am using http://tuckey.org/urlrewrite/

 

[Piotr Kobzda]

Because I am using http://tuckey.org/urlrewrite/

OK, I asked because people sometimes uses regex without a real need for
that. In your case, it seems there is no other way... So, refer to the
Gordon's response, or try the following:

"(?!car_)(?s).*"


piotr

 

[Tim Smith]

I need a regular expression - it should:

Allow all Strings that do not begin with "car_"

^([^c]|c[^a]|ca[^r]|car[^_])