In Dart the null-aware operator for methods in combination with the ?? operator does not work well.
Image having a call chain like this:
object.getter.getter.getter.getter
Now when object could be null and I do not want an exception I have to write this:
object?.getter?.getter?.getter?.getter
That is a null check for every getter, even though only object can be null, but then the getter's obviously do not work.
I am okay with this. But now I have a scenario, where I want to return another value if null, but I am working with a list:
list[index][index][index]
How do I use the null-aware operator on the List getter?
This does not work:
list?[index]
and this does not exist for List's in Dart.
list?.get(index)
I want to achieve something like this:
list?[index]?[index]?[index] ?? 0
Where I know that only list will ever be null.
This long code would work:
list == null ? 0 : list[index][index][index]
