Re: [Templates] multilevel hash to table, plus bonus question

> Thanks for the response Dave.

On Fri, 3 Sep 2004, Jamie Echlin wrote:

> Thanks for the response Dave.

You're welcome.

> > This is something you'd have a hard time doing even in Perl.
>
> Hmm, I thought maybe TT would make it easy for me by not treating "A.B"
> as a hash key but as two keys, but I guess yep, I am asking the
> impossible, or the unlikely at least.

If I understand the internals correctly, the problem is that by the
time TT2 (or Perl, for that matter) is looking to see what $col is
set to, it's already done parsing syntax and assumes it will only
find a variable value inside, not more syntax.  Thus, eval.

> Next qn: Sometimes my API returns an IxHash, ie an ordered hash. When
> this happens I cannot use the hash virtual methods, although they all
> make logical sense. IxHash has methods like Keys Values similar to the
> vmethods, but the case is different. Any ideas here?

The only simple way I can think of to handle this is to do something
like this:

----------------------------------------------------------------------
#!/usr/bin/perl

use strict;
use warnings;
use Tie::IxHash;
use Template;

my @list = ( id => '68000', name => 'Steve', phone => '555-6502' );

my $data = {
	hashes => [
		{ @list },
		new Tie::IxHash( @list )
	]
};

my $tt = new Template or die $Template::ERROR;
$tt->process( \*DATA, $data ) or die $tt->error;

__DATA__
[%- FOREACH hash IN hashes -%]
[%- 	IF hash.can( 'Keys' ) -%]
[%- 		FOREACH key IN hash.Keys %]
	<td>
		[% key %] = [% hash.Values( key ) %]
	</td>
[%- 		END %]
[%- 	ELSE -%]
[%- 		FOREACH key IN hash.keys %]
	<td>
		[% key %] = [% hash.$key %]
	</td>
[%- 		END %]
[%- 	END -%]
[%- END %]
----------------------------------------------------------------------

but that gets a little messy since you have to repeat your
table-cell drawing code.  Perhaps in cobmination with a MACRO to
draw the contents of a cell, this would be a better solution.

I'm sure there are other options, but since one thing is a hash ref
and one is an object ref, it makes things a bit sticky.

Take care,

Dave

/L\_/E\_/A\_/R\_/N\_/T\_/E\_/A\_/C\_/H\_/L\_/E\_/A\_/R\_/N\
Dave Cash                              Power to the People!
Frolicking in Fields of Garlic               Right On-Line!
dave@xxxxx.xxx                                  Dig it all.

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