Solved

Need a pretty version of this RegEx

Posted on 2011-09-16
6
262 Views
Last Modified: 2012-05-12
^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]*

The following does not work:
^[0-9]\d{7}*

it's a dangling meta character. But it not for the first one.

Any idea how to make a short one that works?

Thanks.
0
Comment
Question by:newbieweb
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 82

Accepted Solution

by:
hielo earned 250 total points
ID: 36549952
[0-9] is equivalent to \d

So this:
^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]*

is equivalent to:
^\d\d\d\d\d\d\d\d*

Of those, only the last \d is optional (due to the * character). That meas it must have at least 7 digits. So what you are after is:
^\d{7,}

By putting the comma after the seven you are saying "or more" - making the whole thing read as:
"it must begin with 7 or more digits."
0
 
LVL 143

Assisted Solution

by:Guy Hengel [angelIII / a3]
Guy Hengel [angelIII / a3] earned 125 total points
ID: 36550028
no points, but I would put this:
^\d{7,}$

to make sure you have only digits in the expression (aka your other question)
0
 

Author Comment

by:newbieweb
ID: 36550134
Both fail. I forgot to say this is C#.NET. Maybe that uses a diffferent flavor or RegEx?
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 82

Assisted Solution

by:hielo
hielo earned 250 total points
ID: 36550346
If you have in double quotes try escaping the slash:
"^\\d{7,}"
0
 
LVL 63

Assisted Solution

by:Zvonko
Zvonko earned 125 total points
ID: 36553318
Or escape the String:
@"^\d{8,}"

Open in new window

0
 

Author Closing Comment

by:newbieweb
ID: 36554438
Thanks!
0

Featured Post

Enroll in June's Course of the Month

June’s Course of the Month is now available! Experts Exchange’s Premium Members, Team Accounts, and Qualified Experts have access to a complimentary course each month as part of their membership—an extra way to sharpen your skills and increase training.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I have been reconstructing a PHP-based application that has grown into a full blown interface system over the last ten years by a developer that has now gone into business for himself building websites. I am not incredibly fond of writing PHP code o…
Do you hate spam? I do, and I am willing to bet you do as well. I often wonder, though, "if people hate spam so much, why do they still post their email addresses on the web?" I'm not talking about a plain-text posting here. I am referring to the fa…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question