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quote: You can't do it within HTML::Template, period

According to whom?

#!/usr/bin/perl use strict; use HTML::Template; my $template = " <ul> <TMPL_LOOP tree> <li><TMPL_VAR value> (depth=<TMPL_VAR depth>) <TMPL_LOOP open><ul></TMPL_LOOP> <TMPL_IF close> <TMPL_LOOP close> </li></ul> <TMPL_IF __LAST__></li></TMPL_ +IF> </TMPL_LOOP> <TMPL_ELSE> <TMPL_UNLESS open> </li> </TMPL_UNLESS> </TMPL_IF> </TMPL_LOOP> </ul> "; my $tree = [ { 'value' => 'a', 'depth' => 1 }, { 'value' => 'b', 'depth' => 1 }, { 'value' => 'b1', 'depth' => 2 }, { 'value' => 'b2', 'depth' => 2 }, { 'value' => 'c', 'depth' => 1 }, { 'value' => 'c1', 'depth' => 2 }, { 'value' => 'c1.1', 'depth' => 3 }, { 'value' => 'd', 'depth' => 1 } ]; for my $i (0 .. $#$tree) { my $delta; if (defined($tree->[$i+1])) { $delta = $tree->[$i+1]->{'depth'} - $tree->[$i]->{'dep +th'}; } else { $delta = - $tree->[$i]->{'depth'}; } if ($delta > 0) { push(@{$tree->[$i]->{'open'}},{}) for (1 .. $delta); } elsif ($delta < 0) { push(@{$tree->[$i]->{'close'}},{}) for ($delta .. -1); } } my $html_template = HTML::Template->new( scalarref => \$template, loop_context_vars => 1); $html_template->param('tree' => $tree); print $html_template->output;
Produces the following html:
  • a (depth=1)
  • b (depth=1)
    • b1 (depth=2)
    • b2 (depth=2)
  • c (depth=1)
    • c1 (depth=2)
      • c1.1 (depth=3)
  • d (depth=1)

Isn't there some law of comp-sci that says that say any algorithm that can be written recusively, can also be written iteratively? er...or something to that effect.

Update: fixted sprelling erors

/\/\averick


In reply to Re^2: HTML::Template, pseudo trees and indention. by maverick
in thread HTML::Template, pseudo trees and indention. by BUU

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