The answers in the
FAQ don't modify the array in-place.
In case that's what you need, you can do the following:
my @a = qw( a a b c c c d e f e f e a f g h h h );
my %seen;
for ( my $i = 0; $i <= $#a ; )
{
splice @a, --$i, 1
if $seen{$a[$i++]}++;
}
print "@a\n";
This can be wrapped in a sub like so:
sub remove_duplicates(\@)
{
my $ar = shift;
my %seen;
for ( my $i = 0; $i <= $#{$ar} ; )
{
splice @$ar, --$i, 1
if $seen{$ar->[$i++]}++;
}
}
my @a = qw( a a b c c c d e f e f e a f g h h h );
remove_duplicates( @a );
print "@a\n";
