Lazarus Pascal

Get the Last N Lines of a StringBuilder

Returns up to the last N lines of the contents of a Chilkat StringBuilder. Lazarus Pascal

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.StringBuilder;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  sb: TStringBuilder;
  i: Integer;
  bCrlf: Boolean;

begin
  sb := TStringBuilder.Create;

  i := 1;
  while i < 100 do
    begin
      sb.Append('This is line number ');
      sb.AppendInt(i);
      sb.Append(#13#10);
      i := i + 1;
    end;

  bCrlf := True;
  WriteLn(sb.LastNLines(12,bCrlf));

  //  Output is:
  //  
  //  	This is line number 88
  //  	This is line number 89
  //  	This is line number 90
  //  	This is line number 91
  //  	This is line number 92
  //  	This is line number 93
  //  	This is line number 94
  //  	This is line number 95
  //  	This is line number 96
  //  	This is line number 97
  //  	This is line number 98
  //  	This is line number 99
  //  


  sb.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.