my @array1 = (1 .. 20);
my @array2 = (10 .. 30);
my @array3 = (19 .. 40);
push @all_arrays, \@array1, \@array2, \@array3; ##This is like what will be passed in my actual code

my %unique_descriptive = do {
    local %_;
    for (@{$all_arrays[0]}, @{$all_arrays[1]}, @{$all_arrays[2]}) {
        $_{$_}->{count}++ ; 
        push @{$_{$_}->{values}},$_;
    }
    %_;
};