Match Pattern like 3344 using regular expression C#

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Suppose i have mobile numbers like-

9839223345<br />
9839223346<br />
9839223323<br />
9839223321<br />
9839223350<br />
9839223325<br />
9839334428<br />
9839445529<br />

I want to make a regular expression to match these Patterns.

Posted 14-Dec-14 19:45pm

Surendra0x2

Updated 14-Dec-14 20:10pm

v2

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Comments

Maciej Los 15-Dec-14 1:50am

I do not see AABB in a set of digits ;(

Surendra0x2 15-Dec-14 1:57am

sir suppose i want to match mobile numbers containing patter aabb-2233 means all possible combinations 1122 or 3344 or 5566

Maciej Los 15-Dec-14 2:03am

Possible combinations of what?
Please, provide example input and expected output.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 15-Dec-14 1:53am

Not clear.

Matt T Heffron 16-Dec-14 13:01pm

Do either of the solutions below solve your issue?
If so, please formally "Accept the solution(s)".
If not, can you provide more clarification of the question (use the "Improve question" above)?

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Maciej Los · Answer 1 · 2014-12-14T19:51:00

Please, see my comment to the question.

Pattern for:
- set of characters (word): \w+
- set of digits: \d+

For further information, please see:
Regular Expression Language - Quick Reference[^]
Regular Expression Examples[^]

[EDIT]
If Matt T. Heffron is right and you're looking for a way to find consecutive duplicates i'd suggest this pattern: (\d)\1+

A bit more details: here: http://stackoverflow.com/questions/6507982/regex-to-find-repeating-numbers[^]

Matt T Heffron · Answer 2 · 2014-12-15T06:57:00

Solution 2

I think this is what you want:

(\d)\1(\d)\2

Find a digit followed by the same digit, followed by another digit (possibly the same) followed by the second digit.
Edit:
If the pairs of digits must NOT be the same, (i.e., 2222 should fail), then you can add a negative look-ahead like:

(\d)\1(?!\1)(\d)\2

You can use the Expresso[^] tool (free) to build/explore/learn regular expressions.

Posted 15-Dec-14 6:57am

Matt T Heffron

Updated 15-Dec-14 8:40am

v2

Comments

Maciej Los 15-Dec-14 14:21pm

I hope you're right!
+5!

Andreas Gieriet 16-Dec-14 19:11pm

My 5!
Cheers
Andi