The most straight-forward solution I can think of is to generate all ways to assign each object with a container number. This will generate some assignments where some container does not receive any objects, so you will have to filter them out.
Using Algorithm::NestedLoops, that would look something like:
my $containers = ...
my $objects = ...
NestedLoops(
[ (sub{ [0 .. $containers-1] }) x $objects ],
sub {
my @assignment = @_;
my @bins;
push @{ $bins[$assignment[$_]] }, $_ for 0 .. $objects-1;
## @bins now contains the groupings
## filter out if one of the bins is empty
}
);
There is probably a more direct way to do this, so that you can cleverly iterate over just the assignments that use each bin. But I haven't discovered it yet in the short time that I've been thinking about your post.