On Fri, Oct 20, 2000 at 02:40:58PM +1100, John Ferlito wrote:
> I'm assuming asking perl questions isn't OT :)
Not unless you're asking about Perl on Windoze :-)
> what I want to be able to do is the equivelant of this
>
> $format = "png";
>
> print IMG $my_graph->plot(\@data)->$format;
>
> that of course doesn't work.
Programming Perl 2nd ed p297 has this to say on the subject:
Sometimes you want to call a method when you don't know the
method name ahead of time. You can use the arrow form, replacing
the method name with a simple scalar variable (not an expression
or indexed aggregate) containing a method name:
$method = $fast ? "findfirst" : "findbest";
$fred->$method(@args);
so you *should* be able to do what you want. The only real difference I can
see between the example and your code is the argument list, so try adding an
empty list, like this:
$format = "png";
print IMG $my_graph->plot(\@data)->$format();
Cheers,
John
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