Array::Diff returns an array-reference, see the modified example below: 

use warnings;
use strict;
use Array::Diff;
use Data::Dumper;

my @old = ( 'a', 'b', 'c' );
my @new = ( 'b', 'c', 'd' );
    
my $diff = Array::Diff->diff( \@old, \@new );

my $cnt     = $diff->count;
my $add_ref = $diff->added;     # Array::Diff returns an array-referen
+ce
my $del_ref = $diff->deleted;
    
print "cnt=$cnt\n";

print "add: ", Dumper( $add_ref ), "\n";
print "del: ", Dumper( $del_ref ), "\n";

print "add-list: ", @{$add_ref}, "\n";
print "del-list: ", @{$del_ref}, "\n";


__END__

cnt=2
add: $VAR1 = [
          'd'
        ];

del: $VAR1 = [
          'a'
        ];

add-list: d
del-list: a

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In reply to Re: Using Array::Diff by Perlbotics
in thread Using Array::Diff by edimusrex

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