Pascal (Lazarus/Delphi)

JSON AppendArrayCopy Example

Demonstrates the AppendArrayCopy function.

Note: This example requires Chilkat v9.5.0.82 or above.

Pascal (Lazarus/Delphi)

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.JsonArray,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  json: TJsonObject;
  jarr: TJsonArray;

begin
  json := TJsonObject.Create;
  json.Load('{ "name": "John", "marbles": 100 }');

  jarr := TJsonArray.Create;
  jarr.Load('[ 1, 2, 3, "apple", "orange", [ 10, 20, 30 ], { "name": "Alfred"} ]');

  //  Copy the contents of jar to a new array member named "stuff".
  json.AppendArrayCopy('stuff',jarr);

  WriteLn(json.Emit());
  //  Expected output is:  {"name":"John","marbles":100,"stuff":[1,2,3,"apple","orange",[10,20,30],{"name":"Alfred"}]}

  //  Note: The contents of the array were copied.
  //  If we modify the contents of jarr, it does not modify the array contained within "json" because it is a separate copy.
  //  For example:
  jarr.AddIntAt(-1,2020);
  WriteLn(jarr.Emit());
  //  Expected output: [1,2,3,"apple","orange",[10,20,30],{"name":"Alfred"},2020]

  WriteLn(json.Emit());
  //  Remains unchanged: {"name":"John","marbles":100,"stuff":[1,2,3,"apple","orange",[10,20,30],{"name":"Alfred"}]}


  json.Free;
  jarr.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.