Am Mittwoch, den 23.07.2008, 08:28 +0100 schrieb Jonas Maebe:
> On 23 Jul 2008, at 06:32, Marc Santhoff wrote:
>
> > I understand right that (as I have asked before) an empty (ansi)string
> > is equal to NIL.
>
> True.
>
> > If this is correct, is setting a string to '' the same as setting the
> > string to NIL?
>
> No.
>
> > So i can e.g. use exchagably:
> >
> > {$H+}
> > var
> > s: string;
> > begin
> > s := 'something';
> >
> > { this ... }
> > s := '';
> > { ... works equally to that: }
> > s := NIL;
>
> No, because "s:=nil" doesn't compile.
Mumble ...
> And pointer(s):=nil would create a memory leak.
That's the important part, I'm dealing with cleanly freeing strings when
destroying objects.
> > And more: is the memory consumed by the string freed using one of the
> > two methods?
>
> It is freed if you use s:=''
This is the way to do it, OK.
> (but keep in mind the earlier discussion
> about reference counted types: the memory may not be freed
> immediately, because there may still be hidden references lingering
> around for a while).
I will.
Many thanks,
Marc
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