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I have the following list that is generated where the fist item it the child and the second item is the parent: b:a c:a d:b e:c f:c And it needs to look like this when I am done: +-b--d a -+ + +-e +-c-+ +-f Any help with this would be appreciated.

I'd suggest something along these lines...

use Graph::Easy; my $graph = Graph::Easy->new(); my @nodes=('b:a','c:a','d:b','e:c','f:c'); my ($child,$parent); # build the graph foreach my $node (@nodes) { ($child,$parent) = split(":",$node); $graph->add_edge($parent,$child); } # print the graph print $graph->as_asciii();

I have no idea how to store this either.

Is there any reason you don't want to do this?

# save the graph by saving the list of original nodes open($filehandle,"<","nodes.dat") or die("Can't open file 'nodes.dat' +for writing: $!\n"); print $filehandle join("\n",@nodes);


In reply to Re^2: how to construct tree from parent pointer list by Anonymous Monk
in thread how to construct tree from parent pointer list by bfdi533

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