Perrin,
Is what I'm hearing you say is that in the PerlRun environment (and I'm
guessing the mod_perl environment too), anything that a subroutine uses
coming from outside that code must be passed as a parameter like
'&sub($paramter)'. Am I correct in this.
Associating the words scope and closure helped. I know scope well although
different languages implement the idea differently. I had not heard the
word closure before or had not understood it as scope.
CraigT
Perrin Harkins wrote:
>
> On 7/4/07, CraigT <[EMAIL PROTECTED]> wrote:
>> In each of the modules, I bring 'str' across with something like my
>> $somevar
>> = $page->param("str") assigning the paramter values to a declared Perl
>> variable.
>
> Okay, but do you pass $page explicitly to the sub, or do you just
> define it outside the sub and use it? If it's the latter, you have a
> closure problem.
>
>> The problem is that what is coming across from the
>> invoking module to the invoked module is incorrect.
>
> That sounds like a closure problem, where the sub can only see the
> original version of $page.
>
>> the value of 'str' set in the first invocation
>> persists such that the invocation of the other 2 anchors has the 'str'
>> values from the first invocation.
>
> That sounds like a closure problem too.
>
>> And
>> again, it works fine under CGI.
>
> That sounds like a closure problem too. You never notice that your
> code has a scoping bug (which is what a closure problem is) in CGI
> because the process exits immediately, and the cached value never gets
> used again.
>
>> Also, the ENV variables I had in my scratchpad where mistakenly executed
>> under CGI.
>
> Good, then I think all the mysteries are solved.
>
>> I would like to understand better the 'no longer shared' message in the
>> error log.
>
> That's a message that you get when you have closure problem. It means
> the variable will be cached the first time through and never change
> again.
>
> All that you need to do to fix this problem is to pass all of the
> variables that your sub needs to the sub when you call it. If you
> don't understand what I mean, post one of your subs and we'll show you
> how to change it.
>
> - Perrin
>
>
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