Changing array key text

Brian Milby brian at milby7.com
Tue Jun 25 23:46:49 EDT 2019


Nothing gets put into limbo.  The pointer is deleted/removed from the array thus reducing the reference count held by the object containing the value.  In the above example, the only pointer left is the one held by tSubArray until a copy of the pointer is placed in the array as the new key which raises the reference count back to two.  The reference count never goes to 0 so garbage collection would not touch it.

I’m sure I don’t have the terminology 100% in line with the source, but I think the idea is close.

Thanks,
Brian
On Jun 25, 2019, 9:40 PM -0400, Mark Wieder via use-livecode <use-livecode at lists.runrev.com>, wrote:
> On 6/25/19 4:31 PM, Brian Milby via use-livecode wrote:
> > Value object starts with a ref count of 1 in the array
> > The first put increases the ref count to 2
> > The delete takes it back to 1
> > The second put takes it back to 2
> > At the end of the handler it goes back to 1 since the local var goes away
>
> Mmmmm... no...
>
> With that logic, in my example the contents of tSubArray and limbo would
> be the same. Zero-based logic instead of one-based doesn't help either.
>
> --
> Mark Wieder
> ahsoftware at gmail.com
>
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