How Many Possible ways to remove Duplicates in an array using perl?

Method 1:

sub filter {
    my %hash;
    grep !$hash{$_}++, @_;
}

my @array = qw(e f g h i);
my @final= filter(@array);


Method 2:

use List::MoreUtils qw(uniq);
my @array = qw(1 1 1 2 3 4 4);
my @final= uniq(@array);


Method 3:

my %hash = ();
foreach my $item (@array)
{
    $hash{$item}++;
}
my @final = keys %hash;


Method 4:

my @array=qw( 3 2 3 4 4 3 2);
my @final=keys %{{ map{$_=>1}@array}};
print join ' ', sort{$a<=>$b} @final;


Method 5:

%hash=();
my @array = qw(e j g h i);
@final = grep { ! $hash{$_} ++ } @array;


Method 6:

my @array;
my @finals;

foreach my $var ( @array )
{
    if (! grep(/$var/, @finals ))
    {
          push( @finals, $var );
     }
}


Method 7:

my @array = qw(e f g h i);
my %hash;
@hash{@array}=(1..@array);
@final=keys%hash;


Method 8:

my @final = keys {map {$_ => 1} @array};


Method 9:

@array = qw(e f g h i);
%hash1   = map { $_ => 1 } @array;
@final = keys %hash1;


Method 10:
my @array = qw(e f g h i);
my %hash;
foreach my $v (@array){
        $hash{$v}=1;
}
@final=keys%hash;


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