Solved

Need a pretty version of this RegEx

Posted on 2011-09-16
6
260 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
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

Secure Your Active Directory - April 20, 2017

Active Directory plays a critical role in your company’s IT infrastructure and keeping it secure in today’s hacker-infested world is a must.
Microsoft published 300+ pages of guidance, but who has the time, money, and resources to implement? Register now to find an easier way.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
need some regex help 15 29
Need Help to Improve the regular expression 3 64
Powershell regex followup 13 77
Regular Expression- Range (telephone) 4 55
by Batuhan Cetin Regular expression is a language that we use to edit a string or retrieve sub-strings that meets specific rules from a text. A regular expression can be applied to a set of string variables. There are many RegEx engines for u…
Whatever be the reason, if you are working on web development side,  you will need day-today validation codes like email validation, date validation , IP address validation, phone validation on any of the edit page or say at the time of registration…
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…

749 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