Programming in Dart: Classes

Jun 28 2022 · Dart 2.17, Flutter 3.0, DartPad

Part 2: Learn Inheritance

17. Define a Generic Class

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Previous episode: 16. Implement an Interface Next episode: 18. Add Mixins

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If you watched the previous course, you were introduced to generics. Generics allow us to write code that works on many different types. If you haven’t watched that episode, then stop watching now and watch that episode. It’ll get you up to speed.

class Adder<T extends num> {

T total;
void add(T item) {
  total += total;
total = (total + item) as T;
var intAdder = Adder<int>(0);
var doubleAdder = Adder<double>(4.5);
var stringAdder = Adder<String>(0);