Regular Expression in password

[Chris]

I want to ensure a password has a least one lower case letter, one upper
letter and a number. I'm a bit of a newbie but I understand you can use the
pipe system for OR what about AND.I would like something like this.

[a-z]&[A-Z]&[1-9]

[=?Utf-8?B?TWFuaXNoIEJhZm5h?=]

Hi,
Try following expresion:
var regexp = /^\w*(?=\w*\d)(?=\w*[a-z])(?=\w*[A-Z])\w*$/
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Thanks and Regards,
Manish Bafna.
MCP and MCTS.
"Chris" wrote:

I want to ensure a password has a least one lower case letter, one upper
letter and a number. I'm a bit of a newbie but I understand you can use the
pipe system for OR what about AND.I would like something like this.

[a-z]&[A-Z]&[1-9]

[=?ISO-8859-1?Q?G=F6ran_Andersson?=]

Chris wrote:

I want to ensure a password has a least one lower case letter, one upper
letter and a number. I'm a bit of a newbie but I understand you can use the
pipe system for OR what about AND.I would like something like this.

[a-z]&[A-Z]&[1-9]

There is no and operation in regular expressions. It's not useful, as a
character can not be a lower case letter, an upper case letter and a
digit at the same time. Each character is only one of these.

You can express your demands like any of several different patterns:

something-upper-something-lower-something-digit-something
something-upper-something-digit-something-lower-something
something-lower-something-upper-something-digit-something
something-lower-something-digit-something-upper-something
something-digit-something-upper-something-lower-something
something-digit-something-lower-something-upper-something

The first one would be expressed as:

..*[A-Z].*[a-z].*[1-9].*

Express the others similarly, and put them togther with the or operator:

(.*[A-Z].*[a-z].*[1-9].*)|(...)|(...) ...

--
Göran Andersson
_____
http://www.guffa.com

[Riki]

Göran Andersson wrote:

Chris wrote:

>I want to ensure a password has a least one lower case letter, one
upper letter and a number. I'm a bit of a newbie but I understand
you can use the pipe system for OR what about AND.I would like
something like this. [a-z]&[A-Z]&[1-9]

There is no and operation in regular expressions.

There is.
See Manish's post.

See also www.regexlib.com and search for "password"

--

Riki

[=?ISO-8859-1?Q?G=F6ran_Andersson?=]

Riki wrote:

Göran Andersson wrote:

>Chris wrote:

>>I want to ensure a password has a least one lower case letter, one
upper letter and a number. I'm a bit of a newbie but I understand
you can use the pipe system for OR what about AND.I would like
something like this. [a-z]&[A-Z]&[1-9]

There is no and operation in regular expressions.

There is.
See Manish's post.

See also www.regexlib.com and search for "password"

That's not an and operation. It's a zero-width positive lookahead.

--
Göran Andersson
_____
http://www.guffa.com