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Postings from August 2003
On Wed, Aug 20, 2003 at 07:12:22PM +0100, Nick Ing-Simmons wrote:
> Dave Mitchell <davem@fdgroup.com> writes:
> >But named subs also capture their lexical state at creation time,
>
> Things get confusing:
>
>
> sub harry
> {
> my $foo = shift;
> sub fred { print "$foo\n" }
> }
>
> harry('Ouch');
> harry('Weird');
>
>
> fred();
Run it with -w and you get:
Variable "$foo" will not stay shared at /tmp/p line 6.
Subs capture their lexical environment at creation time. When fred is
created, the instance of $foo it captures happens to be the first one.
A bit later, 'Ouch' is assigned to this instance. Even later, 'Weird' is
assigned to the second instance of $foo, but fred still only sees the
first instance.
D.
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Law is when you get what you pay for.
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