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Password Regular Expression is not working with RadInputManager?

Answer 1

+1 A:

/^(?=.*\d)(?=.*[-;:]).{7,16}$/

You didn't specify what a special character is so I just used an example, but you'll have to replace it with something better.

Mark Byers 2010-02-17 17:32:11

Thanks. I am new to regular expressions, but I am assuming anything between [ ] can be used as a special character, correct?

Xaisoft 2010-02-17 17:43:09

Also, what exactly is a lookahead, I was looking at an indepth link that was explaining it before, but I got lost in translation, I just need a simple to understand example.

Xaisoft 2010-02-17 17:43:59

Xaisoft: Yes any character can be written there, but you have to be careful with characters like `-`, `\` and `]` as these have a special meaning inside character classes and need to be escaped.

Mark Byers 2010-02-17 17:48:52

Sorry that should have been: you have to be careful with: `-`, `\ ` and `]`. Apparently I need to be careful with these too.

Mark Byers 2010-02-17 17:59:26

Mark, that was the link that I was actually looking at and although it was extremely helpful, I think because I don't have an understanding of doing it without a lookhead, I don't see the real value of a lookahead.

Xaisoft 2010-02-17 18:03:39

@Xaisoft: Doing it in one regular expression without a lookahead would be crazy complicated. Using lookaheads allows you to test the three conditions separately instead of having to write one state machine that remembers the state of all three parts of the regular expressions simultaneously.

Mark Byers 2010-02-17 18:14:08

Thanks, I changed the regular expression to /^(?=.*\d)(?=.*[.$#]).{7,16}$/. Note the special characters, is that the correct way to put it?

Xaisoft 2010-02-17 18:49:22

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Password Regular Expression is not working with RadInputManager?

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