Jc wrote:
> I just had a friend explain in some little detail about linked lists
> in C using structures.
>
> How would such a thing be done with Perl? This may help me
> understand C's version a little better.
>
> If you need more information than this, I can provide it...I think :)
Yes, more information would be nice. In particular C has no built-in
linked-list capability and I would like to see what sort of
implementation you're wanting to emulate.
The most common way to implement linked lists in C is by pointers.
Something like:
struct link {
int data;
struct tag *next;
} a, b;
a.data = 1;
a.next = &b;
b.data = 2;
and so on. Perl has references, which are similar to C pointers
except that you can't do arithmetic on them (to find the address
of a given array element given its base address, say) so you could
write something equivalent like this:
my (%a, %b);
$a{data} = 1;
$a{next} = \%b;
$b{data} = 2;
But exactly how the list is implemented depends on what
functionality you need.
HTH,
Rob
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