At 11:15 AM 1/30/02 -0800, Christopher Solomon wrote:
>I'm not well versed on the versions of Perl, but I don't think that was
>a particularly bug-free version. I would recommend upgrading to at
>least 5.005_03
Actually 5.004_04 was quite stable. 'exists' was not extended to apply to
arrays until a later version, that's all. To some of us, it still looks at
best misleading.
>On Wed, 30 Jan 2002, Nikola Janceski wrote:
>
> > I have two versions of perl (5.004_04, and 5.6.1)
> >
> > it seems the older one doesn't like the following code:
> >
> > sub somefunction {
> > if(exists $_[0]){
> > print "$_[0]\n";
> > }
> > }
> >
> > Output of perl -c (of 5.004_4):
> > exists operator argument is not a HASH element at ....
> >
> > any ideas why the old version dies and the new version has no problems?
I would write this as
sub somefunction {
if (@_) {
print "$_[0]\n";
}
}
although unless the first argument might be false it's more readable to say
sub somefunction {
if (my $arg = shift) {
print "$arg\n";
}
}
(Alters @_, of course.)
--
Peter Scott
Pacific Systems Design Technologies
http://www.perldebugged.com
--
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
