:44
To: Perl-Win32-Users
Subject: Re: numeric vs string scalars...difference?
Hi Andy,
Thanks for your response.
For clarification I'm doing equality comparisons. Thus...
$x = '45.0';
$y = '45';
if ($x eq $y) {print values are equal;}
...does not product the desired result (i.e
-
From: Paul Sobey [EMAIL PROTECTED]
To: Paul Rogers [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Wednesday, November 17, 2004 4:16 AM
Subject: RE: numeric vs string scalars...difference?
Hi,
Isn't eq a string comparison? Try using == instead:
print String compares\n if 45 eq 45.0; # Fails
]
Subject: Re: numeric vs string scalars...difference?
Hi Paul,
You are absolutely right. However, the real problem was that
I had to
dynamically determine whether to use == or eq...thus I needed
a way of
reliably determining whether a variable was numeric or
string. That's where
: Thomas, Mark - BLS CTR [EMAIL PROTECTED]
To: 'Paul Rogers' [EMAIL PROTECTED];
[EMAIL PROTECTED]
Sent: Wednesday, November 17, 2004 2:07 PM
Subject: RE: numeric vs string scalars...difference?
How about 1.02e12?
If you want to know if it looks like a number to perl, this might be
handy:
use
Paul Rogers [perl-users AT coservers DOTnet] wrote:
I need to dynamically do comparisons tests on an array of
values...some strings, some numeric. One snag I hit is
comparing the occasional numeric values. Using eq as
the comparison operator fails on comparisons like
45.0 vs 45.
Is
=~ /^-?(\d+\.?\d*|\.\d+)$/) {
print This is a numeric value.;
}
Thanks,
Paul ---
- Original Message -
From: Andy Bach
To: Paul Rogers [EMAIL PROTECTED]
Sent: Tuesday, November 16, 2004 6:03 PM
Subject: Re: numeric vs string scalars...difference?
45.0 vs 45.
So should they match
