There are various modules on CPAN that will help you a great deal.

With Tree::DAG_Node for instance you can traverse the tree, running methods or simply and safely pruning and splicing the leaves and branches of your tree as you go along.

Untested... 

my @leaves = ();
$root->walk_down('callback' =>
  sub {
    if (!scalar($_[0]->daughters))  # is it a leaf?
      push @leaves, $_[0];
    return 1;
  }
$root->add_daughters(@leaves);

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In reply to Re: Moving data in a tree by shoness
in thread Moving data in a tree by hoffmann

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