[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

Not Allowing Specific Character in Regular Expression

Posted on 2007-03-22
4
Medium Priority
?
450 Views
Last Modified: 2012-08-13
Is it possible to specify that you don't want a specific character at a specific position in a regular expression?

In otherwords I want it to return true if the string is "blahblahblah" but not if it is blahblahblah[" and only that one character should be disallowed.
0
Comment
Question by:jfredrickson
  • 2
  • 2
4 Comments
 
LVL 58

Accepted Solution

by:
amit_g earned 2000 total points
ID: 18775574
/blahblahblah[^[]/

[^abcd] matches anything but abcd.
0
 
LVL 4

Author Comment

by:jfredrickson
ID: 18775589
Is there no way to only specify that you don't want that specific character?
0
 
LVL 4

Author Comment

by:jfredrickson
ID: 18775599
Doh! Misread that. Looks perfect, thanks.
0
 
LVL 58

Expert Comment

by:amit_g
ID: 18775600
Thats exactly what it is. [^[] would match any character but [ i.e. the reg ex would not match if there is a [ in it (in turn disallowing it).
0

Featured Post

Vote for the Most Valuable Expert

It’s time to recognize experts that go above and beyond with helpful solutions and engagement on site. Choose from the top experts in the Hall of Fame or on the right rail of your favorite topic page. Look for the blue “Nominate” button on their profile to vote.

Question has a verified solution.

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

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…
We are witnesses that everyone is saying that our children shouldn't "play" with a technology because it is dangerous. This article is going to prove that they are wrong.
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…

872 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