Re: Regular expression: How to determine wether entry is a number?
- From: paul@xxxxxxxx (Paul Johnson)
- Date: Tue, 29 Jul 2008 17:42:42 +0200
On Tue, Jul 29, 2008 at 05:46:09AM -0700, Jan-Henrik wrote:
Now I would like to check wether the user really entered a number and
not letters. What would a check like that look like? A regular
expression like this:
----------------------------------------
unless ($foo =~ /[a-zA-Z\D+][^.][\D*]/ {...};
----------------------------------------
Is there an easier or more beautiful way?
perldoc -q scalar number
Also, how would I substract just a number from a string? Searched the
net for an example but didn't succeed, so sorry for asking a question
like that...
In general you might not have to, you can probably just use it as a number and
perl will do the right thing. But otherwise you could just put parentheses
around your regex to capture the numeric part.
--
Paul Johnson - paul@xxxxxxxx
http://www.pjcj.net
.
- References:
- Regular expression: How to determine wether entry is a number?
- From: Jan-Henrik
- Regular expression: How to determine wether entry is a number?
- Prev by Date: Re: Regular expression: How to determine wether entry is a number?
- Next by Date: Re: Regular expression: How to determine wether entry is a number?
- Previous by thread: Re: Regular expression: How to determine wether entry is a number?
- Next by thread: Re: Regular expression: How to determine wether entry is a number?
- Index(es):
Relevant Pages
|
