On Wed, Feb 28, 2001 at 06:08:43PM -0000, Jonny Cavell wrote:
> [-
> my @fields = qw(a b);
> print OUT "@fields";
> sub testingit{
> print OUT "@fields";
> }
> -]
>
> The first print gives the correct value ("a,b")
> The second print gives an incorrect answer occasionally - seemingly an old
> version of the variable.
if i understand things correctly:
embperl cleans up the variables used in each page by undef'ing them
after the page has executed.
your sub keeps a reference to @fields, and it continues to use the
original @fields, even when the "real" @fields has been undef'ed and
recreated. this is actually a feature of perl (see "Private Variables
via my()" in perlsub(1p) and anything talking about "closures").
> Interestingly, if I declare @fields in [$ var $] the problem does not seem
> to occur.
i'm guessing that embperl doesn't undef variables in this case (?), so
both the function and new users of the variable are actually accessing
the same thing.
so:
you can't do anything about it, except:
1. avoid that construct. if you have to use variables local to the
page, you should be using %mdat anyway.
2. use [$var$] declarations, since they seem to work.
--
- Gus
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