A Factory Pattern or Factory Method Pattern says that just define an interface or abstract class for creating an object but let the subclasses decide which class to instantiate . In other words, subclasses are responsible to create the instance of the class.
Read moreWhich pattern is super factory?
Abstract Factory patterns work around a super-factory which creates other factories. This factory is also called as factory of factories. This type of design pattern comes under creational pattern as this pattern provides one of the best ways to create an object.
Read moreWhat is stream sink Flutter?
Streams and sinks are backbones in Dart and Flutter asynchronous programming . … A Stream gives an approach to get a sequence of events. Every event is either an information event, a component of the stream, or an error event, a warning that something has fizzled.
Read moreWhat is stream controller in Flutter?
A controller with the stream it controls . This controller allows sending data, error and done events on its stream. This class can be used to create a simple stream that others can listen on, and to push events to that stream.
Read moreWhat is streams in Flutter Dart?
Streams provide an asynchronous sequence of data . Data sequences include user-generated events and data read from files. You can process a stream using either await for or listen() from the Stream API. Streams provide a way to respond to errors. There are two kinds of streams: single subscription or broadcast.
Read moreHow do I use stream Flutter?
In flutter, streams are usually used with the StreamBuilder which manages and unsubscribes from a stream for you internally once the widget is destroyed. A good rule to follow is when you subscribe to a stream, keep the Subscription and write the code in the dispose method to call cancel .10 Eyl 2019
Read moreWhat is stream and sink in Flutter?
Stream: This class represents an asynchronous stream of data . Listeners can subscribe to be notified of the arrival of new data events. EventSink: A sink is like a stream that flows in the opposite direction. Adding data events to an EventSink funnels that data into a connected stream.12 Tem 2020
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