What are some examples of polymorphism in TypeScript?

What are some examples of polymorphism in TypeScript?

Polymorphism in TypeScript allows methods to do different things based on the object it is acting upon. For example, you can have a base class 'Animal' with a method 'makeSound', and subclasses like 'Dog' and 'Cat' that implement this method differently.

Can you show me a code example?

Sure! Here's a simple example:

class Animal {
    makeSound(): void {
        console.log('Some sound');
    }
}

class Dog extends Animal {
    makeSound(): void {
        console.log('Bark');
    }
}

class Cat extends Animal {
    makeSound(): void {
        console.log('Meow');
    }
}

const animals: Animal[] = [new Dog(), new Cat()];
animals.forEach(animal => animal.makeSound());

This will output 'Bark' and 'Meow'.

What is the benefit of using polymorphism?

Polymorphism promotes code reusability and flexibility. It allows you to write more generic code that can work with different types of objects, making your codebase easier to maintain and extend.

Are there any limitations to polymorphism in TypeScript?

Yes, one limitation is that TypeScript's type system is structural, which means that it focuses on the shape of data rather than its inheritance. This can sometimes lead to unexpected behavior if not managed carefully.