Re: newbie: deactivate query before freeing?

"swansnow" <schultz@xxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:1127950675.863873.233630@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
[...]
> In addition you're saying that the following code is ok:
>
> myQuery := nil;
> freeAndNil(myQuery);
>
> But the following code isn't ok?
>
> myQuery := nil;
> myQuery.free;
>
> Do I have it right?

Er, no. Sorry. Free is *always* safe. I think I said that, but I'm too
lazy to go back and check. FreeAndNil adds no magic, just the convenience
of freeing and clearing an object reference in a single statement.

The unsafe one is Destroy, the destructor. Trying to destroy anything
but a valid object reference is an instant access violation.

Groetjes,
Maarten Wiltink


.

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