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Managing State in Flutter Using BLoC Pattern

StreamController

Explore the use of StreamController to manage data streams in Flutter's BLoC pattern. Understand how to create, control, and listen to streams, including pausing, resuming, and using EventSink to handle asynchronous events effectively.

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The StreamController is a type of stream that allows developers to control the flow of data within a stream. They allow pausing and resuming the flow of data, as well as control the flow of data by adding values to the stream. This level of control is often necessary when dealing with asynchronous data.

How to use StreamController

Using StreamController is relatively straightforward. The following example demonstrates how to create a StreamController and add values to it:

Dart
// Create a StreamController
StreamController<int> streamController = StreamController<int>();
// Add values to the stream
streamController.add(1);
streamController.add(2);
streamController.add(3);

In line 2, we set up a streamController using the StreamController class. This ...