I get the warning when $a or $b is 'etc' or "ccp". and it seems to be tied to the two lines I commented on. The if statement above them does not cause any problems, but I assume that's because neither site has any numbers in them(?). Is there something I can do to eliminate the warnings or can I just ignore them (and add a no warnings numeric)? Using Perl 5.16.3. 
my %site = (
        24j1 => { count=>1, devices=>['192.168.0.1'] },
        1924 => { count=>3, devices=>['192.168.1.1','192.168.1.3','192
+.168.1.9'] },
        etc  => { count=>2, devices=>['192.168.2.1','192.168.2.23'] },
        ccp  => { count=>1, devices=>['192.168.3.1'] },
);

sub my_sort {
    if(  ("$a" ~~ @datacenters) && ("$b" ~~ @datacenters) )  {
        return $site{$b}->{count} <=> $site{$a}->{count};
    }
    if(  ("$a" ~~ @datacenters)  && ! ( "$b" ~~ @datacenters) ) { retu
+rn $a }  # Warnings go away if I 
    if(  ("$b" ~~ @datacenters)  && ! ( "$a" ~~ @datacenters) ) { retu
+rn $b }  # comment out these two lines.
    if(  ( $a  =~ $eu_regex   )  &&   (  $b  !~ $eu_regex   ) ) { retu
+rn $a }
    if(  ( $b  =~ $eu_regex   )  &&   (  $a  !~ $eu_regex   ) ) { retu
+rn $b }
    return $site{$b}->{count} <=> $site{$a}->{count};
}

foreach my $site ( sort my_sort keys %site  ) {do_stuff_with($site) }

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In reply to Argument isn't numeric in sort -- resolve or ignore? by Argel

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