If you want to keep the order and edit in place, try this: 
sub util_remove_duplicates{
  my $ref=shift;
  my %hash;
  @$ref=grep{!$hash{$_}++} @$ref;
}
my @array=qw(a b c a j k l m o p q k);
print "@array\n";
util_remove_duplicates(\@array);
print "@array\n";

[download]
OUTPUT: 
a b c a j k l m o p q k
a b c j k l m o p q

[download]

In reply to Re: Removing Duplicates from Array Passed by Reference by fletcher_the_dog
in thread Removing Duplicates from Array Passed by Reference by arunhorne

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