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What Regular Expression do I need to match "3213.32.2311" and similar?

Answer 1

+2 A:

^\d{4}\.\d{2}\.\d{4}$

Dominic Rodger 2010-08-17 12:54:07

(These) (are) (pointless)

Peter Boughton 2010-08-17 13:18:56

@Peter - sorry, force of habit. I virtually never write a regex where I don't care about what the different parts are.

Dominic Rodger 2010-08-17 13:21:39

Perhaps you should use regex more then. ;) I frequently have quick jobs that don't need captures. But no problem, it's just a little thing that bugs me (though not quite as much as `^(this)$` when `$0` or `\0` is already available). Could be useful to mention both ways in your answer, in case it helps with what the OP is doing. :)

Peter Boughton 2010-08-17 13:29:54

Answer 2

+1 A:

\d{4}\.\d{2}\.\d{4}

kuroutadori 2010-08-17 12:54:12

Need to escape the dot.

slebetman 2010-08-17 12:54:50

Annoyingly enough I did, but StackOverflow editing escaped it. Had to do \\.

kuroutadori 2010-08-17 12:59:01

Answer 3

+1 A:

Try: \d{4}\.\d{2}\.\d{4}

slebetman 2010-08-17 12:54:24

Answer 4

+4 A:

Get yourself a regex cheatsheet such as http://www.regular-expressions.info/reference.html

fredley 2010-08-17 12:55:23

Though they look daunting, they're really not that bad. I can never remember the syntax - so a good cheat sheet is a must.

fredley 2010-08-17 13:01:04

Also, reading a guide/cheatsheet and writing the expression yourself will help you learn the syntax much quicker than a copy-paste answer.

Peter Boughton 2010-08-17 13:23:05

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What Regular Expression do I need to match "3213.32.2311" and similar?

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