This is probably not the most efficient way to do this but it will work. This uses a hash to keep track of the duplicates.
my %hash;
my @NewArray;
#read all of the values of the array into keys of the hash,
#this eliminates all of the duplicates
foreach my $var (@OriginalArray) {
$hash{$var}=0;
}
#this loop marks any variable that appeared twice in the
#original array.
foreach my $var2 (@OriginalArray) {
$hash{$var}++;
}
#This fills a new array based on the information from the
#above loop
foreach my $var3 (keys (%hash)) {
if (!$hash{$var3} > 1) {
print "$hash{$var3} deleted\n";
} else {
$NewArray[@NewArray]=$hash{$var3};
}
}
@OriginalArray = @NewArray;
update ++ dpuu and thelenm for their much better and more efficient answers to this question.
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