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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> 詳測 Generics Collections TList (1): Add、Clear、Count、Capacity

詳測 Generics Collections TList (1): Add、Clear、Count、Capacity

編輯:Delphi

unit Unit1; 
 
interface 
 
uses 
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 
 Dialogs, StdCtrls; 
 
type 
 TForm1 = class(TForm) 
  Button1: TButton; 
  procedure Button1Click(Sender: TObject); 
 end; 
 
var 
 Form1: TForm1; 
 
implementation 
 
{$R *.dfm} 
 
uses Generics.Collections; 
 
procedure TForm1.Button1Click(Sender: TObject); 
var 
 List: TList; 
 i: Integer; 
 str: string; 
begin 
 List := TList.Create(); 
 
 {Add} 
 List.Add(22); 
 List.Add(33); 
 List.Add(11); 
 
 {Count、Capacity} 
 ShowMessageFmt('Count: %d; Capacity: %d', [List.Count, List.Capacity]); 
 
 str := ''; 
 for i in List do str := str + UIntToStr(i) + sLineBreak; 
 ShowMessage(str); 
 
 {Clear} 
 List.Clear; 
 ShowMessageFmt('Count: %d; Capacity: %d', [List.Count, List.Capacity]); 
 
 List.Free; 
end; 
 
end. 


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