Lazarus Pascal

Get a Substring by Char Index and Length

Demonstrates how to use the GetRange method to get a substring by index and length.

Note: This example demonstrates the GetRange method which was added in Chilkat v9.5.0.87.

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
  success: Boolean;
  sb: TStringBuilder;
  removeFlag: Boolean;
  result: string;

begin
  success := False;

  sb := TStringBuilder.Create;

  //  Load a file that contains this string:  0123456789ABCDEF
  success := sb.LoadFile('qa_data/txt/remove_chars.txt','utf-8');

  //  Return "56789A" from the string.
  //  if removeFlag is True, the returned string is also removed from the sb.
  removeFlag := True;
  result := sb.GetRange(5,6,removeFlag);

  WriteLn(result);
  WriteLn(sb.GetAsString());

  //  Output is: 
  //  
  //  56789A
  //  01234BCDEF


  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.