On Sep 30, 2010, at 10:52 AM, Jeff King wrote:
> They don't necessarily do what you want:
>
> perl -e 'sub want_scalar($) { print "got $_[0]\n" }
> want_scalar("ok");
> my @a = qw(totally broken);
> want_scalar(@a);
> '
>
> I get:
>
> got ok
> got 2
>
> And using "sub want_list(@)" basically does nothing at all (you can pass
> nothing, a scalar, or a list).
I'm not surprised by that at all, but I've spent too much time in scripting languages recently.
> For more details, read:
>
> http://www.perlmonks.org/?node_id=861966
>
> (If you're impatient, skip to the section "Problems with Regular
> Prototypes").
Huh. Somewhere along the way I had picked up using prototypes as a solution to some problem and got used to them. Interesting to see the full discussion why you shouldn't. I guess I'm reading too much Ruby and Perl6 and didn't think about how that would work with Perl5.
~~ Brian
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