How do I create a generic class in TypeScript?

How do I create a generic class in TypeScript?

To create a generic class in TypeScript, you can use angle brackets to define a type parameter. For example:

class GenericClass<T> {
    private value: T;

    constructor(value: T) {
        this.value = value;
    }

    getValue(): T {
        return this.value;
    }
}

This allows you to create instances of GenericClass with different types.

Can you give me an example of using this generic class?

Sure! Here's how you can use the GenericClass:

let numberInstance = new GenericClass<number>(42);
console.log(numberInstance.getValue()); // Outputs: 42

let stringInstance = new GenericClass<string>('Hello, TypeScript!');
console.log(stringInstance.getValue()); // Outputs: Hello, TypeScript!

What are the benefits of using generic classes?

Generic classes provide type safety and reusability. They allow you to create classes that can work with any data type while ensuring that the operations on that data type are valid.

Can I create a generic class with multiple type parameters?

Yes, you can! You can define multiple type parameters by separating them with commas. For example:

class Pair<K, V> {
    private key: K;
    private value: V;

    constructor(key: K, value: V) {
        this.key = key;
        this.value = value;
    }

    getKey(): K {
        return this.key;
    }

    getValue(): V {
        return this.value;
    }
}