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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); procedure Button2Click(Sender: TObject); end;
var Form1: TForm1;
implementation
{$R *.dfm}
//TStringBuilder.CopyToprocedure TForm1.Button1Click(Sender: TObject);var sb: TStringBuilder; arr: TCharArray; i: Integer;begin sb := TStringBuilder.Create; sb.Append('123456789');
SetLength(arr, 9); for i := Low(arr) to High(arr) do arr[i] := '*';
sb.CopyTo(3, arr, 1, 5); ShowMessage(PChar(arr)); {*45678***}
sb.Free;end;
//TStringBuilder.Charsprocedure TForm1.Button2Click(Sender: TObject);var sb: TStringBuilder;begin sb := TStringBuilder.Create('Delphi 2009');
ShowMessage(sb.Chars[0]); {D} ShowMessage(sb.Chars[sb.Length - 1]); {9}
sb.Free;end;
end.
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