Regular expression for checking repeating sequences, e.g., 1234 or abcd

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Hi...

I'm looking for a regular expression to check a String contains repeated sequence like 1234, abcd, def, etc. to validate password... Thanks in advance.

Posted 14-Jun-11 0:23am

Silju MC

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shakil0304003 14-Jun-11 6:49am

Not clear!!!

2 solutions

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OriginalGriff · Answer 1 · 2011-06-14T00:40:00

Solution 1

And I think you will continue looking: that is not something I would want to do with a regex, particularly since you do not know the length of the sequence to be checked for.
Instead - since I assume this is for checking password strength - why not use existing code: Password Advisor[^] has code in VB, C# and JS.

Posted 14-Jun-11 0:40am

OriginalGriff

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Kim Togo 14-Jun-11 6:45am

Good advice and link!

Sergey Alexandrovich Kryukov 14-Jun-11 11:47am

Agree, I vote 5, too. I added just two cents...
--Sa

Sergey Alexandrovich Kryukov · Answer 2 · 2011-06-14T05:46:00

Solution 2

Repeating sequences do not really compromise password strength. Why do you think its main or even important criterion? Length of the password, using wider range of characters, not using words from dictionary are much more important. Password Advisor will know better :-)

—SA

Posted 14-Jun-11 5:46am

Sergey Alexandrovich Kryukov