1 firstWhere
void method(){
List<T> rs
//before
rs.firstWhere((element) => false, orElse: () => ,);
//should change
import 'package:collection/collection.dart';
rs.firstWhereOrNull((element) =>) ?? '';
}
2 provider
//if use provider in StatefulWidget, most use ChangeNotifierProvider.value()
//before
NotifierModel? model;
//should change
late NotifierModel model;
@override
void initState() {
model = NotifierModel();
super.initState();
}
@override
Widget build(BuildContext context) {
return ChangeNotifierProvider.value(value: model, child:...);
}
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