I have a hash which is full of "objects", with the current key being the hostname of an object, and the IPv4 address being a value within the object. I need to sort the hash based on the IPv4 address, and I think I found all of the parts, but I can't seem to put them together. Currently I am just doing a common sort based on the IPv4 address, but this is just based on ASCII values of the characters, not on the 4x octets in an IPv4 address. I have the subroutine which can sort IPv4 addresses, I just do not know the syntax to use it in this situation. What am I missing? 
foreach my $hostname (sort {$hash{$a}->ip_address() cmp $hash{$b}->ip_
+address() or $a cmp $b} keys %hash) {...}

sub ip_sort {
  my @a = split /\./, $a;
  my @b = split /\./, $b;

  return $a[0] <=> $b[0]
      || $a[1] <=> $b[1]
      || $a[2] <=> $b[2]
      || $a[3] <=> $b[3];
}

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In reply to Sorting Hash Value Object's IPv4 Address by razmeth

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