I think this is what you want(untested) 
my $collection = Collection->new({ 'sorter' => \&Sort::mysorter });

...

sub new
{
  my ($self, $options) = @_;
  .  .  .
  $self->{sorter} = $options->{sorter};
}

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You actually pass the CODEREF into the constuctor, instead of using a soft reference.

In reply to Re: Passing a reference to a subroutine in a constructor by tcf22
in thread Passing a reference to a subroutine in a constructor by DrSax

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