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1.ΪÄܸüͨÓÃһЩ£¬°Ñ´æ´¢µÄÖµ¸ÄΪPointerÀàÐÍ;
2.ÐÂÔöÁËFindKey·½·¨ÓÃÓÚÅжϱíÖÐÊÇ·ñ´æÔÚij¸öKeyÁË;
3.ÐÂÔöÁËStartEnumºÍEnumValue·½·¨£¬ÓÃÓÚ±éÀúÕû¸ö¹þÏ£±í£¬±ÈÈ磺
var aItem:TIntfItem;
begin
FList.StartEnum;
while FList.EnumValue(Pointer(aItem)) do
begin
if aItem.Lifecycle=ilSys then
aItem.Free;
end;
end;
4.ÐÂÔöÁËOnDeletionʼþ£¬¹¦ÄܺÍTtreeViewµÄOnDeletionÒ»Ñù£¬É¾³ýItemʱ´¥·¢£¬¿ÉÒÔÔÚÕâÀïÊÍ·ÅЩ¶«Î÷£¬±ÈÈ磺
procedure TIntfFactory.OnDeletion(var Value: Pointer);
begin
if assigned(Value) then
begin
TIntfItem(Value).Free;
Value:=nil;
end;
end;
ÏÂÃæÊÇÐ޸ĺóµÄ´úÂ룺
unit HashList;
interface
Type
PPHashItem = ^PHashItem;
PHashItem = ^THashItem;
THashItem = record
Next: PHashItem;
Key: string;
Value: Pointer;
end;
TDeletionEvent=Procedure(var Value:Pointer) of Object;
THashList = class
private
FEnumIndex:Cardinal;
FCurrItem:PHashItem;
Buckets: array of PHashItem;
FOnDeletion: TDeletionEvent;
procedure DoDeletion(var Value:Pointer);
protected
function Find(const Key: string): PPHashItem;
function HashOf(const Key: string): Cardinal; virtual;
public
constructor Create(Size: Cardinal = 256);
destructor Destroy; override;
procedure Add(const Key: string; Value: Pointer);
procedure Clear;
 
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procedure TForm1.Button3Click(Sender: TObject);
var
i: integer;
Buffer: PChar;
s: string;
begin
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unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
procedure Button1Click(Sender: TObject);
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