Lazarus Pascal

StringBuilder SetNth

Demonstrates the SetNth method. 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;
  delimiterChar: string;
  exceptDoubleQuoted: Boolean;
  exceptEscaped: Boolean;

begin
  //  The SetNth method is handy for setting a part of a delimited string.
  //  For example:

  sb := TStringBuilder.Create;
  sb.Append('red,blue,"green,purple",,yellow');

  delimiterChar := ',';
  exceptDoubleQuoted := True;
  exceptEscaped := True;

  sb.SetNth(2,'magenta',delimiterChar,exceptDoubleQuoted,exceptEscaped);
  //  Prints "red,blue,magenta,,yellow"
  WriteLn(sb.GetAsString());

  sb.SetNth(3,'orange',delimiterChar,exceptDoubleQuoted,exceptEscaped);
  //  Prints "red,blue,magenta,orange,yellow"
  WriteLn(sb.GetAsString());

  //  What happens if we start with an empty string?
  sb.Clear();

  sb.SetNth(2,'apple',delimiterChar,exceptDoubleQuoted,exceptEscaped);
  //  Prints ",,apple"
  WriteLn(sb.GetAsString());

  sb.SetNth(0,'orange',delimiterChar,exceptDoubleQuoted,exceptEscaped);
  //  Prints "orange,,apple"
  WriteLn(sb.GetAsString());

  sb.SetNth(1,'banana',delimiterChar,exceptDoubleQuoted,exceptEscaped);
  //  Prints "orange,banana,apple"
  WriteLn(sb.GetAsString());


  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.