just a quick question when i run the code below it gives the 1st elemnt in the array last and the rest in their proper order is this a side effect of the operation or have i made a mistake with my code.i just using it to remove all instances of the contents of @a1 from @a2.. 
#! /usr/bin/perl -w

use strict;
use Quantum::Superpositions;

my @a2 = qw/1 2 2 3 3 3 4 4 4 4 5 6 7/;#list of to_visit
my @a1 = qw/1 2 3 4/;#list of visited
@a2 = eigenstates(any(@a2) != all(@a1));
print "list of to visit\n";
print_arrays(\@a2);
print "\nlist visited\n";
print_arrays(\@a1);

sub print_arrays
{
    my($x) = @_;
    for my $item1 ( @$x ) 
    {
        print $item1,"\n";
    }
    print "\n";
}

[download]
it returns 

list of to visit
6
7
5


list visited
1
2
3
4

[download]

In reply to Quantum::Superpositions prob by tommycahir

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