in reply to "" isn't numeric...

This is just a warning, not an error. You could always use the ||= operator to force an empty string to 0 

use warnings;

my $numb = ''; 
print $numb + 5; # issues warning

$numb ||= 0;
print $numb +5; # no warning

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It is a minor nuisance, but it is a nice warning to know about it, as it might lead to unexpected results down the road.

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

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Re^2: "" isn't numeric...
by davidrw (Prior) on Oct 14, 2005 at 20:01 UTC
    i tend to do that inline, too: 
    my $numb = '';
print 5 + ($numb||0); # no warning

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    I also do the same thing to avoid "Use of uninitialized value in concatenation (.) or string" warnings: 
    print "==> Foo: " . ($s || '') . "<===\n";

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