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.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.