FutureBuilder solves a square value and returns the result after 5 seconds, till then we show a progress indicator to the user. StreamBuilder shows a stopwatch, incrementing _count value by 1 every second.
Read moreWhat is snapshot Flutter?
Snapshot is the result of the Future or Stream you are listening to in your FutureBuilder . Before interacting with the data being returned and using it in your builder, you have to access it first.
Read moreWhat is a builder in Flutter?
A builder is a Flutter design pattern in which the construction code of a widget is defined outside of its class . Builder functions are callback interfaces that pass data (often layout-specific) to the parent widget which returns a child based on that data.
Read moreWhy do we use factory constructor in flutter?
A normal constructor always returns a new instance of the class. A factory constructor is permitted to return an existing instance, an instance of a derived class, or null .
Read moreWhat is a factory constructor in flutter?
Factory constructors return am instance of the class, but it doesn’t necessarily create a new instance . Factory constructors might return an instance that already exists, or a sub-class. Rules for factory constructors: Factory constructors do use the return key word.
Read moreHow do I create async function in Dart?
Here, the function variable type just needs to specify that it returns a Future: class Example { Future<void> Function() asyncFuncVar ; Future<void> asyncFunc() async => print(‘Do async stuff…’); Example() { asyncFuncVar = asyncFunc; asyncFuncVar(). then((_) => print(‘Hello’)); } } void main() => Example();
Read moreWhat is async and async * In Flutter?
async gives you a Future and async* gives you a Stream . When users marks a function as async or async* allows it to use async/await keyword to use a Future.
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