Programming in Dart: Classes

Jun 28 2022 · Dart 2.17, Flutter 3.0, DartPad

Part 2: Learn Inheritance

18. Add Mixins

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Previous episode: 17. Define a Generic Class Next episode: 19. Learn Other Language Features

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00:02You’ve learned how to create interfaces. It’s a great way for different classes to have similar behavior. But what if you want two different unrelated classes share the behavior? Well, for that, you use Mixins. A mixin is a bit of code that other code can incorporate.

class Calculator {}

final calculator = Calculator();

mixin Adder {

}

void sum(num a, num b) {
    print('The sum is ${a + b}.');
}

class Calculator with Adder {}

calculator.sum(4, 6);