Casting vs Parsing Map

main.dart

void main() {
  // Sample response map
  final response = {
    'freezeCart': {
      'id': '123',
      'name': 'Sample Cart',
      'items': ['item1', 'item2'],
    },
  };

  // Example 1: Direct Casting
  print('\nExample 1: Direct Casting');
  try {
    final directCast = response['freezeCart'] as Map<String, Object?>;
    print('Direct Casting: $directCast');
  } catch (e) {
    print('Direct Casting Error: $e');
  }

  // Example 2: Using Map<String, Object?>.from
  print('\nExample 2: Using Map<String, Object?>.from');
  try {
    final mapFrom = Map<String, Object?>.from(response['freezeCart'] as Map);
    print('Map<String, Object?>.from: $mapFrom');
  } catch (e) {
    print('Map<String, Object?>.from Error: $e');
  }

  // Example 3: Using Spread Operator
  print('\nExample 3: Using Spread Operator');
  try {
    final spreadOperator = {...response['freezeCart'] as Map<String, Object?>};
    print('Spread Operator: $spreadOperator');
  } catch (e) {
    print('Spread Operator Error: $e');
  }

  // Example of an invalid response to show error handling
  final invalidResponse = {'freezeCart': 'This is not a map'};
  print(
    '\n\nExample of an invalid response to show error handling $invalidResponse\n',
  );

  // Direct Casting with invalid response
  print('\nExample 1: Direct Casting with invalid response');
  try {
    final directCastInvalid =
        invalidResponse['freezeCart'] as Map<String, Object?>;
    print('$directCastInvalid');
  } catch (e) {
    print('$e');
  }

  // Map<String, Object?>.from with invalid response
  print('\nExample 2: Map<String, Object?>.from with invalid response');
  try {
    final mapFromInvalid = Map<String, Object?>.from(
      invalidResponse['freezeCart'] as Map,
    );
    print('$mapFromInvalid');
  } catch (e) {
    print('$e');
  }

  // Spread Operator with invalid response
  print('\nExample 3: Spread Operator with invalid response');
  try {
    final spreadOperatorInvalid = {
      ...invalidResponse['freezeCart'] as Map<String, Object?>,
    };
    print('$spreadOperatorInvalid');
  } catch (e) {
    print('$e');
  }
}