What's the meaning of the question mark in this piece of code? And when am I supposed to use it? My code functions the same way with or without the question mark.
void dispose(){
bloc?.dispose();
super.dispose();
}
1 Answers
The question mark is one of the null-aware operators in Dart. In this example it says: call the dispose() method only if bloc is not null. Without the question mark, if bloc was null when it tried to call dispose() a NoSuchMethodError would be thrown.
There is a useful section on the Dart site about null-aware operators:
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