Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked

Passing arguments to subroutines using Template Toolkit

by elbie (Curate)
on Nov 30, 2001 at 01:00 UTC ( #128457=perlquestion: print w/replies, xml ) Need Help??
elbie has asked for the wisdom of the Perl Monks concerning the following question:

Using the process method in the Template Toolkit, I often want to call a subroutine with arguments, as follows:

$some_var = 'Hello world!'; $my_templ->process( "$TEMPLATE_DIR/hello_world.html", { 'filler' => \&some_sub( $some_var ) } );

But when I do that, I get ARRAY(0x84ab2c30) or similar where the replacement happens in the output.

Typically, I've been getting around this by calling the subroutine beforehand:

$some_var = &some_sub( 'Hello world!' ); $my_templ->process( "$TEMPLATE_DIR/hello_world.html", { 'filler' => $some_var } );
but I'd like to avoid this if I can. What is the "proper" way to pass variables?


Replies are listed 'Best First'.
Re: Passing arguments to subroutines using Template Toolkit
by guha (Priest) on Nov 30, 2001 at 01:30 UTC
    Never worked with TT but wouldn't this work ??
    { 'filler' => &some_sub( $some_var ) } );
      Grr. Of course this works. sigh. I think I spent too much time looking at the first page of the TT perldoc where it tells me to pass it as a reference. I tried every combination of \&some_sub I could think of...


        You only need to pass the sub as a reference if you plan to call it from within the template. Passing it as a ref lets you do this in your template:
        [% filler(some_var) %]
        Personally, I like to avoid callbacks from within templates when possible, but this can be useful for things like passing in a subroutine that escapes HTML characters.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: perlquestion [id://128457]
Approved by root
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others meditating upon the Monastery: (6)
As of 2017-08-20 17:36 GMT
Find Nodes?
    Voting Booth?
    Who is your favorite scientist and why?

    Results (317 votes). Check out past polls.