use strict;
use warnings;
use Data::Dumper;

my ( $ipaddress, $prefix, $interface, $device, $location) = ('no_ws', 
+' some_ws ', undef, '  lotsa  ws  ', undef);
s/^\s+|\s+$//g for grep {defined $_} ( $ipaddress, $prefix, $interface
+, $device, $location);

print Dumper ( $ipaddress, $prefix, $interface, $device, $location);

[download]
(Thanks AnomalousMonk for the strings :D). So this yields: 
$VAR1 = 'no_ws';
$VAR2 = 'some_ws';
$VAR3 = undef;
$VAR4 = 'lotsa  ws';
$VAR5 = undef;

[download]
It works fine.

In reply to Re^4: Test if multiple variables are defined by Eily
in thread Test if multiple variables are defined by stroke

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