Re: Meaning of [@tempArray]

On Jun 12, 6:41 am, [email protected] (Rodrick Brown) wrote:
> On Thu, Jun 12, 2008 at 5:28 AM, [email protected] <[email protected]>
> wrote:
>
> > Hi there,
>
> > I am stuck with something here.
> > What does the following piece of code mean?
>
> > my @temp1;
> > my @temp2;
> > $cnt=0;
> > $temp2[$cnt] = [@temp1];
>
> > What is the kind of data stored in $tempFieldNames[$information] ?
>
> Your creating a reference to an array as and storing that reference in array
> index 0.
> Data::Dumper can be very helpful for understanding what's going on here its
> no different than doing saying $temp2[$cnt]  = \@temp1;

Actually, it's quite different.  In the OP, $temp2[$cnt]  is a
reference to an anonymous array that happens to have been initialized
with the data that was in @temp1 at the time it was created.   In your
modification, $temp2[$cnt] is a reference to @temp1.

In the OP, if any following statements modify @temp1, those changes
will not be reflected in @{$temp2[$cnt]}.  Similarly, changes to
@{$temp2[$cnt]} will not be reflected in @temp1.

In your modification, changes to one will affect the other, because
they're the same array.

Paul Lalli