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Thanks for the example. I really appreciate it. I couldn't get it to work with my own data until I realized that you had the parent of the first row equal to the id of that row. In my data, I had the parent of the first row equal to zero. Just a logic fault on my part.

I added a pre-sort at the beginning so that the time stamp of the node would be taken into account for nodes with the same parent, though I'm sure there is a better way to do it.

use strict; use warnings; my (%posts, @threads, $id, $root, $board, $parent, $stamp, $title); my @array; while (<DATA>) { chomp($_); my @subarray = split(/,/,$_); push @array, [@subarray]; } my @sortedarray = sort { $a->[4] cmp $b->[4] } @array; for my $x (0..$#sortedarray) { ($id, $root, $board, $parent, $stamp, $title) = @{$sortedarray[$x] +}; my %post = ('id' => $id, 'root' => $root, 'parent' => $parent, 'st +amp' => $stamp, 'title' => $title); $posts{$id} = \%post; if ($id == $parent) { push @threads, \%post; } else { push @{$posts{$parent}{'children'}}, \%post; } } construct($_) for @threads; sub construct { my $p = $_[0]; print "$p->{'id'} $p->{'title'}\n"; construct($_) for @{$p->{'children'}}; } #id,board,root,parent,stamp,text __DATA__ 1,2,0,1,2006-01-02 08:15:00,test line 1 (first) 2,2,1,1,2006-01-02 08:16:00,test line 2 (second) 3,2,1,2,2006-01-02 08:21:00,test line 3 (third) 6,2,1,1,2006-01-02 08:23:00,test line 6 (seventh) 4,2,1,1,2006-01-02 08:22:00,test line 4 (sixth) 7,2,1,6,2006-01-02 08:25:00,test line 7 (eighth) 5,2,1,3,2006-01-02 08:23:00,test line 5 (fourth) 8,2,1,1,2006-01-02 08:17:00,test line 8 (fifth)
Is it possible to have the all data produced by construct assigned/returned to a single array of hashes without the array having to be scoped globally? This is the main reason that I didn't want to use a recursive routine.

In reply to Re^2: Adjancey Tree Confusion by ChrisR
in thread Adjacency Tree Confusion by ChrisR

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