I have a stream that holds string values and i want to get the last value in that string. what's the best way to do it?
Stream<String> get searchTextStream {
return _searchController.stream.transform(
StreamTransformer<String, String>.fromHandlers(
handleData: (value, sink) {
if (value.isEmpty || value.length < 4) {
sink.addError('please enter some text..');
} else {
sink.add(value);
}
},
),
);
}
Get the rxDart package from here https://pub.dartlang.org/packages/rxdart.
import 'package:rxdart/rxdart.dart'; // 1. Import rxDart package.
final _searchController = BehaviorSubject<String>(); // 2. Initiate _searchController as BehaviorSubject in stead of StreamController.
String _lastValue = _searchController.value; // 3. Get the last value in the Stream.
BehaviorSubject is an Object rxDart package. It works like a StreamController, by default the broadcast() is on and BehaviorSubject has more function than StreamController.
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