Pascal (Lazarus/Delphi)

Load a JsonArray

See more JSON Examples

Demonstrates how to load a JsonArray.

Note: This example requires Chilkat v9.5.0.64 or greater.

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
  a: TJsonArray;
  json: TJsonObject;
  abc: TJsonArray;

begin
  //  This example requires Chilkat v9.5.0.64 or greater.

  //  Loading into a new JSON array is simple and straightforward.
  a := TJsonArray.Create;
  a.Load('[ 1,2,3,4 ]');

  //  Output:  [1,2,3,4]
  WriteLn(a.Emit());
  WriteLn('--------');

  //  The JsonArray's Load and LoadSb methods have a peculiar behavior when
  //  it is already part of a JSON document.  In this case, the JsonArray
  //  becomes detached, and the original document remains unchanged.
  //  This is intentional due to the nature of the internal implementation.
  //  For example:

  json := TJsonObject.Create;
  json.Load('{ "abc": [ 1,2,3,4 ] }');

  //  Output:  (json) {"abc":[1,2,3,4]}
  WriteLn('(json) ' + json.Emit());
  WriteLn('--------');

  abc := json.ArrayOf('abc');
  //  When Load is called, abc becomes it's own document, and the original is not modified.
  abc.Load('[ 5,6,7,8 ]');

  //  Output: (abc) [5,6,7,8]
  WriteLn('(abc) ' + abc.Emit());
  WriteLn('--------');

  //  Output: (json) {"abc":[1,2,3,4]}
  WriteLn('(json) ' + json.Emit());
  WriteLn('--------');
  abc.Free;


  a.Free;
  json.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.