in reply to Re^2: Test if multiple variables are defined
in thread Test if multiple variables are defined

Yes, you are right and I definitely know it. As noted in my update above, I really meant to write:

s/^\s+|\s+$//g for grep {defined $_} ( $ipaddress, $prefix, $interface, $device, $location);

But, as I also said in my update, that does not work as I expected, the "for" does not seem to deliver to the s/// statement the elements supplied by the grep. I got it working quite easily using a map instead of a for, but it no longer has the relative cleverness I was looking for.

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Re^4: Test if multiple variables are defined
by Eily (Monsignor) on Jun 26, 2013 at 22:06 UTC 

    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.

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Re^4: Test if multiple variables are defined
by Laurent_R (Canon) on Jun 28, 2013 at 18:52 UTC

    Alright, I must have done something else wrong in my test. Thank you for your message.

[reply]

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