All,
Roy Johnson gave me the following p5 code and indicated it would be nice if it was ported to p6: 
sub ret_iter4 {
    my @ranges = @_;
    my $last=1;
    $last *= @$_ for @ranges;
    my $iteration=0;
    return sub {
        return if $iteration >= $last;
        my $i = $iteration++;
        my $possibilities = $last;
        map {
            $possibilities /= @$_;
            my $this_iter_i = $i / $possibilities;
            $i %= $possibilities;
            $_->[$this_iter_i];
        } @ranges;
    }
}

[download]
Here is my attempt: 
sub ret_iter4 (@loops is copy) returns Ref {
    my $last = [*] @loops.map:{ $_.elems };
    my $iter = -1;
    return sub {
        my $i = ++$iter;
        return () if $iter >= $last;
        my $possible = $last;
        return @loops.map:{
            $possible /= $_.elems;
            my $this_iter_i = $i / $possible;
            $i %= $possible;
            $_[$this_iter_i];
        };
    };
}

[download]

Cheers - L~R

In reply to Re: Perl6 Contest #2: P6 That Doesn't Look Like P5 by Limbic~Region
in thread Perl6 Contest #2: P6 That Doesn't Look Like P5 by Limbic~Region

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