Howdy,

While playing around with HTML::Template, I found a nice behavior, which is problably documentented, but I haven't found it.
If you run this code 

# the template is just <TMPL_VAR NAME="hallo">

use HTML::Template;
use strict;
my $t=new HTML::Template( filename => "/tmp/tmpl");
print "3 ".time()."\n";
$t->param( "hallo" => \&littletest );
sleep 3;
print "2 ".time()."\n";
sleep 3;
print $t->output;
 
sub littletest {
        print "1 ".time()."\n";
        return "test";
        }

[download]
it prints out: 
3 1019119182
2 1019119185
1 1019119188
test

[download]
But if you change the referenced sub to just the sub (delete the \), it prints out: 
3 1019119294
1 1019119294
2 1019119297
test

[download]

Cool he

This allows you to setup parameters which will be evaluated at print time instead of assignment time.
If this isn't a new feature, well than I am just proud to have found a documented feature myself :-)
---------------------------
Dr. Mark Ceulemans
Senior Consultant
IT Masters, Belgium

In reply to Nice HTML::Template feature by mce

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