WinRT : JsonArray by reference

Question

Hello,

Is there a way to use the array once for all arrays

Should be enough one array for all arrays. Works not. Looks like per value instead by reference.

Idea: JsonArray arrOutput; And then clear for each new array.

    struct JsonArray;
    struct JsonError;
    struct JsonObject;
    struct JsonValue;	

JsonObject finalOutput;
JsonArray arrOutputSerial;
JsonArray arrOutputSerialIndex;
JsonArray arrOutputVariableKey;
JsonArray arrOutputVariableValue;
arrOutputVariableKey.Clear();

for (int i = 0; i < VariableKeyArray.GetSize(); i++)
{
	arrOutputVariableKey.Append(JsonValue::CreateStringValue(CA2W(VariableKeyArray[i]).m_psz));
}

finalOutput.Insert(L"VariableKey", arrOutputVariableKey);

arrOutputVariableValue.Clear();

for (int i = 0; i < VariableValueArray.GetSize(); i++)
{
	arrOutputVariableValue.Append(JsonValue::CreateStringValue(CA2W(VariableValueArray[i]).m_psz));
}
finalOutput.Insert(L"VariableValue", arrOutputVariableValue);

Answer 1

@Noah Aas, Welcome to Microsoft Q&A, when you use arrOutputVariableKey.Clear();, it clears all references to that JsonArray. So, if you're trying to reuse the same array object (arrOutputVariableKey) for multiple inserts, it won't work as expected.

I recommend that you use a New JsonArray instance for each entry.

  std::vector<std::wstring> VariableKeyArray = { L"Key1", L"Key2", L"Key3" };
  std::vector<std::wstring> VariableValueArray = { L"Value1", L"Value2", L"Value3" };
  JsonObject finalOutput;
  // Create and fill JsonArray for "VariableKey"
  JsonArray arrOutputVariableKey;
  for (const auto& key : VariableKeyArray) {
      arrOutputVariableKey.Append(JsonValue::CreateStringValue(key));
  }
  finalOutput.Insert(L"VariableKey", arrOutputVariableKey);
/*  arrOutputVariableKey.Clear();*/
  // Create and fill JsonArray for "VariableValue"
  JsonArray arrOutputVariableValue;
  for (const auto& value : VariableValueArray) {
      arrOutputVariableValue.Append(JsonValue::CreateStringValue(value));
  }
  finalOutput.Insert(L"VariableValue", arrOutputVariableValue);
  //// Print final JSON output
  std::wcout << L"Final JSON Output:\n" << finalOutput.Stringify().c_str() << std::endl;

Output:

Best Regards,

Jack

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