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Thread ID: 125084	2012-06-05 22:59:00	Writing Regular Expressions	Jstewart (16241)	Press F1

Post ID	Timestamp	Content	User
1279826	2012-06-05 22:59:00	Hi there - I'm currently trying to write some regular expressions for some software we are using and wondering if someone can let me know if I have done the two I need correctly: One expression is for a username and I have: "^([a-zA-Z0-9 ]){3,20}$" This is only meant to allow any letter (lower case or capital), any number between 0-9 and a space and must be between 3 and 20 characters. For the password I have: "(?!^[@]*$)(?!^[0-9]*$)(?!^[a-zA-Z]*$)^([a-zA-Z0-9@]{8,63})$" This is only meant to allow @,0-9,a-z and A-Z. This must be between 8 and 63 characters. Thank in advance! James	Jstewart (16241)
1279827	2012-06-05 23:17:00	It would help to know what language you are using. The first part of the first one will need something to separate them.	mikebartnz (21)
1279828	2012-06-05 23:46:00	Depending on the language used, the first one looks correct. I would've expected the second to simply be "^[a-zA-Z0-9@]){8,63}$" - again, depending on the language.	inphinity (7274)
1279829	2012-06-05 23:48:00	To be honest, I have no idea what language this is in. It's just a regular expression that uses the rules to allow users to enter a username and password into our CRM software. The original codes were: Const USERNAMEPATTERN = "^([a-zA-Z0-9]){3,20}$" Const ASSWORDPATTERN = "(?!^[0-9]*$)(?!^[a-zA-Z]*$)^([a-zA-Z0-9]{8,63})$" These codes work perfectly at the moment but I am needing to relax the rules they use slightly to allow spaces in the username and @ in the password, so I changed the code to: Const USERNAMEPATTERN = "^([a-zA-Z0-9 ]){3,20}$" Const PASSWORDPATTERN = "(?!^[@]*$)(?!^[0-9]*$)(?!^[a-zA-Z]*$)^([a-zA-Z0-9@]{8,63})$" Regards James	Jstewart (16241)
1279830	2012-06-21 10:36:00	Infinities second RegEx looks sound to me too, your second looks to be a bit more complex than I think you are describing?	adslgeek (14687)
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