SPUG: 0 == undef

[David Dyck]

On Wed, 7 Apr 2004 at 12:27 -0700, Tim Maher <tim at consultix-inc.com> wrote:

> Maybe the latest Regexp::Common (which I don't have handy)
> has a regex to match numbers, otherwise, it's pretty easy
> to roll your own (but don't forget leading - signs, and
> embedded decimal places).


The online perl FAQ give advice on testing for numbers, try:
 perldoc -q determine number
which will provide advice for testing for number

Yes Regexp::Common has a lot of support for matching numbers
see
   perldoc Regexp::Common::number
which provides regexes for numbers (integers and reals).
You are warned
       Do not use this module directly, but load it via
       Regexp::Common.

It even parses Roman numerals!