I'm writing some LDAP programs and have started out by cutting & pasting from POD examples. I've generalized the following code somewhat but think the result can be improved. I have to test whether $entry->get('var') is defined or the program dies with the following message: 
Can't use an undefined value as an ARRAY reference at ldap.test2.pl li
+ne xx.

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So the question is, is there an idiom that would simplify or at least make the following code (particulary within the for loop) easier to read? BTW, the code below runs with no errors or warnings and the results appear to be correct. 
use strict;
use warnings;
use Net::LDAP;
use Net::LDAP::Util qw / ldap_error_text /;
use Net::LDAP::Schema;
use Net::LDAP::Entry;
use Net::LDAP::Search;
use Data::Dumper;

## snip

my @vars = qw( cn mail );  ## this will have about 30 fields eventuall
+y
my %uids;

for my $entry ($searchresult->entries) {
   my $uid = '';
   $uid = ${$entry->get('uid')}[0] if defined $entry->get('uid');
   if ($uid) {
      for (@vars) {
         $uids{$uid}{$_} = '';
         $uids{$uid}{$_} = ${$entry->get($_)}[0]
            if defined $entry->get($_);
      }
   } else {
     print "*** No uid for the following  entry:\n";
     print Dumper(\$entry);
   }
}

[download]
Thanks for any and all feedback.

In reply to About BLOCK variables by Anonymous Monk

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