[Javascript] Regarding Password Validation

[Håkan Magnusson]

Ramachandran,
This could be accomplished with only one regexp, of course.

My regexp skills are not quite up to date, but something that vaugely 
resembles this line should probably work:

/[0-9]{2,}[^a-zA-Z0-9]{1,}/

You can then test your password field value against the regexp, and it 
will return true if the password has at least two numbers and one 
special character.

Again, my regexp skills are not very hot. Someone who do know the ins 
and outs of regexps can build this for you in the blink of an eye, this 
regexp is NOT complicated. If you really need me to, I can build it for 
you when I have the time.

Dave,
I don't know about 'missing 80% of the power of JavaScript', regexps 
have nothing to do with JavaScript. Saying that someone who doesn't know 
regexps are missing 80% of the power of string manipulation/testing 
sounds more accurate to me. ;)

H


David Lovering wrote:

> The easiest way I can think of is to use two regular expression filters to
> strip (respectively) everything out EXCEPT numbers, and everything out
> EXCEPT special characters.  The output of these two filters are put into two
> strings, such as
> 
> var digitString;
> var specialString;
> 
> ... and then simply check the length of the two strings to make sure that
> they are greater than or equal to 2 and 1, again respectively.
> 
> If you're not up on regular expression filters, you're missing about 80% of
> the power of JavaScript (at least IMO).
> 
> Try
> 
>   var re0 = /[^0-9]/g;
>   var re1 = /[a-zA-Z0-9]/g;
> 
>   var digitString = myString.replace(re0, "");
>   var specialString = myString.replace(re1, "");
> 
>   alert("number of digits: " + digitString.length);
>   alert("number of special characters: " + specialString.length);
> 
> Or some variation thereof.  Incidently, I'd also check myString (the target
> string coming in) for total length as well, as short strings are easy to
> crack.
> 
> -- Dave Lovering
> ----- Original Message ----- 
> From: "Ramachandran" <ramachandran at summitworks.com>
> To: "[JavaScript List]" <javascript at LaTech.edu>
> Sent: Monday, March 01, 2004 6:42 AM
> Subject: [Javascript] Regarding Password Validation
> 
> 
> 
>>Hi all,
>>
>>I want to perform a validation in password field. The validation includes
>>the following conditions.
>>
>>1. It should contain atleast two no.s and once special characters.
>>
>>How can i do this one..
>>
>>Regards,
>>Ram
>>
>>_______________________________________________
>>Javascript mailing list
>>Javascript at LaTech.edu
>>https://lists.LaTech.edu/mailman/listinfo/javascript
>>
>>
> 
> 
> 
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