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Re: x objects in y containers where all objects are used

by blokhead (Monsignor)
on Nov 06, 2009 at 15:34 UTC ( #805506=note: print w/ replies, xml ) Need Help??


in reply to x objects in y containers where all objects are used

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.

blokhead


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