Regex Q (Another one)

[John B]

Could anyone tell me why the following do not match?

^ABC_\d{6}_\d{6 }$

Should match(twice):

ABC_123456_7891 23
ABC_123456_7891 23

It matches:
ABC_123456_7891 23

But not the double one.

Regex options set are:

RegexOptions.Ig noreCase | RegexOptions.Ig norePatternWhit espace |
RegexOptions.Mu ltiline

TIA

JB

[=?ISO-8859-1?Q?Arne_Vajh=F8j?=]

Re: Regex Q (Another one)

John B wrote:

Could anyone tell me why the following do not match?
>
^ABC_\d{6}_\d{6 }$
>
Should match(twice):
>
ABC_123456_7891 23
ABC_123456_7891 23
>
It matches:
ABC_123456_7891 23
>
But not the double one.
>
Regex options set are:
>
RegexOptions.Ig noreCase | RegexOptions.Ig norePatternWhit espace |
RegexOptions.Mu ltiline

If I read your description correct, then it does more sound as
a problem with the code retrieving matches than with the regex.

Try post the code.

Arne

[Lucas Eagleton]

Re: Regex Q (Another one)

Hi John,

I may be wrong, but from my experience, if it was to match your double item,
it should be (^ABC_\d{6}_\d{ 6}$)+

meaning that it would allow that whole pattern one or more times as opposed
to just once.

- Lucas


"John B" <jbngspam@yahoo .comwrote in message news:fn0meq$qu2 $1@aioe.org...

Could anyone tell me why the following do not match?
>
^ABC_\d{6}_\d{6 }$
>
Should match(twice):
>
ABC_123456_7891 23
ABC_123456_7891 23
>
It matches:
ABC_123456_7891 23
>
But not the double one.
>
Regex options set are:
>
RegexOptions.Ig noreCase | RegexOptions.Ig norePatternWhit espace |
RegexOptions.Mu ltiline
>
TIA
>
JB

[John B]

Re: Regex Q (Another one)

Lucas Eagleton wrote:

Hi John,
>
I may be wrong, but from my experience, if it was to match your double
item, it should be (^ABC_\d{6}_\d{ 6}$)+
>
meaning that it would allow that whole pattern one or more times as
opposed to just once.
>

Hmm, I was under the impression that it would match _any_ instances
(only the *and+ operators being greedy and eating the other matches
would interfere).

I am by no means an expert though and I tried the grouped one or more
and it still didnt work.

I eventually used (?:^|\r|\n)(?<a sn>abc_\d{6}_\d {6})(?:$|\r|\n) which
worked, see reply to Arne for more.

Thanks for your help.

John

- Lucas
>
>
"John B" <jbngspam@yahoo .comwrote in message
news:fn0meq$qu2 $1@aioe.org...

>Could anyone tell me why the following do not match?
>>
>^ABC_\d{6}_\d{ 6}$
>>
>Should match(twice):
>>
>ABC_123456_789 123
>ABC_123456_789 123
>>
>It matches:
>ABC_123456_789 123
>>
>But not the double one.
>>
>Regex options set are:
>>
>RegexOptions.I gnoreCase | RegexOptions.Ig norePatternWhit espace |
>RegexOptions.M ultiline
>>
>TIA
>>
>JB

>

[=?ISO-8859-1?Q?Arne_Vajh=F8j?=]

Re: Regex Q (Another one)

John B wrote:

Arne Vajhøj wrote:

>A bit of experimentation shows that:
>>
>matcher.Matche s("ABC_123456_7 89123\nABC_1234 56_789123")
>>
>will find 2 matches.
>>
>But it is not obvious to me why \n is the proper line
>delimiter and not \r\n.
>>
>Maybe someone with more regex knowledge than me can
>explain it.

>
Ahh, I see.
Hmm, that is kind of odd, I would have thought the system "New Line"
variable would be used (\r\n for windows obviously)

Me too.

But ...

Arne

[henon]

Re: Regex Q (Another one)

On Jan 21, 1:42 am, John B <jbngs...@yahoo .comwrote:

Lucas Eagleton wrote:

Hi John,

>

I may be wrong, but from my experience, if it was to match your double
item, it should be (^ABC_\d{6}_\d{ 6}$)+

>

meaning that it would allow that whole pattern one or more times as
opposed to just once.

>
Hmm, I was under the impression that it would match _any_ instances
(only the *and+ operators being greedy and eating the other matches
would interfere).
>

yes + and * are greedy but you can make them not greedy by appending
a ? like this:

new Regex("#.+?#") matched against "#hello # world#" would give
"#hello #"
while new Regex(".+") would return the match "#hello # world#"

hth,
-- henon

--------------

http://www.eqqon.com/index.php/User:Henon

[henon]

Re: Regex Q (Another one)

On Jan 21, 12:10 pm, henon <meinrad.rech.. .@gmail.comwrot e:

while new Regex(".+") would return the match "#hello # world#"

correction: while new Regex("#.+#") would return the match "#hello #
world#"