in reply to Re^3: How do I obtain a list of values for all the properties of a Word document using Win32::OLE?
in thread How do I obtain a list of values for all the properties of a Word document using Win32::OLE?

Okay. I can see that now. But.. I'm still at a loss for how to avoid the infinite loop while enumerating all the properties. Any advice?
  • Comment on Re^4: How do I obtain a list of values for all the properties of a Word document using Win32::OLE?

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Re^5: How do I obtain a list of values for all the properties of a Word document using Win32::OLE?
by ikegami (Patriarch) on Jun 11, 2009 at 20:25 UTC

    Trying to avoid looping entirely might not be possible. I don't see anything in Win32::OLE that would help uniquely identify an object, and that would be required to avoid looping.

    You could put limits on your looping (depth, time, number of objects visited, etc). Doing a breadth-first traversal (rather than a depth-first traversal) will make it easier to produce good results while adding limits. 

    sub depth_first {
   my ($n) = @_;
   for ($n->children()) {
      depth_first($_);
   }
}

sub breadth_first {
   my @todo = @_;
   while (@todo) {
      my $n = shift(@todo);
      push @todo, $n->children();
   }
}

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