Use the delete function to remove an element from a hash. Example: delete $hash{foo};

If you only want to remove one of the elements from the anonymous array (say the second element) in the hash element 'foo', you can do this: delete $hash{foo}[1];

BTW, to keep the values of the hash that you're deleting (in the %wanted hash), the delete function returns the key and value. Example: $wanted{foo} = delete $hash{foo}; Here's a complete example:

    my %wanted   = ();
    my %hash     = ( 'foo' => [1,2,3], 'bar' =>[3,4,5]);
    $wanted{foo} = delete $hash{foo};

    print "Left-over:\n";
    for $key (keys %hash) {
        print "$key, @{$hash{$key}}\n";
    }

    print "Wanted:\n";
    for $key (keys %wanted) {
        print "$key, @{$wanted{$key}}\n";
    }
[download]

Produces the following output:

    Left-over:
    bar, 3 4 5
    Wanted:
    foo, 1 2 3
[download]

Good luck!