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

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<Cardinal>;

  i: Integer;

  str: string;

begin

  List := TList<Cardinal>.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.