matching an element from one array to another

[Noah]

Hi there,

I am hoping to figure out the best Way to write something.  I have two 
arrays @previous_hostnames and @hostnames.

I want to figure out if there is at least one matching element in 
@previous_hostnames that is found in @hostnames.

What about finding all matching elements.

I suppose I can write for loops like this:
        for my $hostname (@hostnames) {
            for my $previous_hostname (@previous_hostnames) {
                if ($hostname == $previous_hostname) {
                    $found = 1;
                    last;
                }
            }
            last if $found;
        }

is there another way?

Cheers,
Noah

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