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. And pointer(s):=nil would create
a memory leak.
And more: is the memory consumed by the string freed using one of the
two methods?
It is freed if you use s:='' (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).
Jonas
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