Travis Basevi wrote:
> Yes, I know that solution,
Sorry, I totally missed that in your original message.
> but lets say the text comes from a database
> or some other source rather than being hardcoded in the template. Is
> there a more general/correct solution than something along the lines of:
>
> b.replace('_err_', a.replace('$','\$'));
Ah, I see. I thought that was easy work for $50 million!
I think Dave's got it right in terms of counting the backslashes.
b.replace('_err_', a.replace('$','\\\$'));
But I would be inclined to add a custom virtual method that does it all
in Perl space. I typically use '.format' for this kind of thing:
package My::Template;
use base 'Template';
sub new {
my $class = shift;
my $self = $class->SUPER::new(@_);
my $context = $self->context;
$context->define_vmethod(
item => format => sub {
sprintf($_[1], $_[0])
}
);
return $self;
}
package main;
my $tt = My::Template->new(...);
...etc...
Then you can write:
[% a = 'this problem will cost me $50 million to fix';
b = 'WARNING: %s';
a.format(b);
%]
I recall going to add this as a core virtual method at some point in
the past, but I couldn't decide if it made more sense as b.format(a)
or a.format(b). I guess I must have stalled before reaching any
decision.
Now that I look at it again, I think it makes more sense as b.format(a),
otherwise you're limited to only one argument. But for that matter, it
should probably just be called .sprintf
[% format = "hello %s, the time is %s on %s";
format.sprintf(username, time, date)
%]
Then the implementation is even simpler:
$context->define_vmethod(
item => format => sub {
sprintf(shift, @_)
}
);
The other possibility is to use the existing format filter.
[% a | format(b) %]
But be warned that it's a line-oriented filter so if your 'a' has any
newlines in it then the filter will be applied to each line:
[% a = "Oh Noes!\nThis will cost me $50 million to fix";
b = "WARNING: %s";
a | format(b);
%]
This will output:
WARNING: Oh Noes!
WARNING: This will cost me $50 million to fix
HTH
A
_______________________________________________
templates mailing list
[email protected]
http://mail.template-toolkit.org/mailman/listinfo/templates
