[fpc-pascal] methods of an object to create others
Marco van de Voort
marcov at stack.nl
Tue Jul 6 18:59:28 CEST 2010
In our previous episode, Andrew Brunner said:
> >> > ?obj1.Free;
> >> > ?obj2.Free;
> >> > end;
> >> >
> >> > The objectcs are protected. But is boring... :)
> >> > Everybody codify like that, afraid if resources are not available?
> >> >
> >> Nope. If Obj2 failed to create you will have a problem with Obj2.Free.
> > Nope. That's why it is free and not destroy.
> Double Nope. You cannot access methods of a nil object. Nil.Free
> will in-it-and-of-it cause a read access violation.
1. Did you test this? And then debug it?
2. Ask yourself why don't we call .destroy directly, and what the use
of .free is over .destroy.
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