----- Original Message -----
From: "Josh Rosenbaum" <[EMAIL PROTECTED]>
To: "Jonathan Mangin" <[EMAIL PROTECTED]>
Cc: <[email protected]>
Sent: Thursday, August 24, 2006 12:08 PM
Subject: Re: [Templates] sorting a multi-valued hash
> Jonathan Mangin wrote:
> > Is it possible to sort a multi-valued hash?
> > In psuedo-code (all cols are text):
> >
> > $menu{id} = [concat(col2,col3), col2, col3];
> >
> > I hoped it would default to sorting on value.0, but output
> > appears random.
> >
> > [% FOREACH item IN menu.sort %]
> > [% IF menu.$item.1 == rows.0.1 %]
> > <option value="[% item %]" selected>[% menu.$item.0 %]
> > [% ELSE %]
> > <option value="[% item %]">[% menu.$item.0 %]
> > [% END %]
> > [% END %]
> >
> > Two (or more) of these constructs in the template sort in
> > the same order. It must not be random but I can't see the
> > pattern. Is there anything else I can do to get a sort on
> > value.0?
>
>
> I think you'll need to create your own hash virtual method, or use a
different structure.
>
> Something like this might work:
> menu = [
> {id => 'xxx', column1 => concat(col2,col3), columns => [col2,
col3]},
> {id => 'xxx', column1 => concat(col2,col3), columns => [col2,
col3]},
> {id => 'xxx', column1 => concat(col2,col3), columns => [col2,
col3]},
> ]
>
> Then [% FOREACH item IN menu.sort('column1') %]
>
> Here's an example vmethod that works on your hash above. (Well maybe. I
didn't test or think about it much):
> $Template::Stash::HASH_OPS->{ sort_array } = sub {
> my ($hash, $index) = @_;
> return sort {$hash->{$a}->[$index] cmp $hash->{$b}->[$index] } keys
%$hash;
> };
>
> Usage: [% FOREACH item IN menu.sort_array(0) %]
>
> Of course you might want to make it a bit more robust than that, or change
it to suit your needs.
>
> -- Josh
>
I used your example vmethod since it's nearly identical to
the original sort vmethod. Works perfectly, though you didn't
test or think about it much ;)
Thanks alot,
Jon
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