What are some examples of generics in different programming languages?

What are some examples of generics in different programming languages?

Generics allow you to write flexible and reusable code. For example, in Java, you can use generics with classes and methods like this: public class Box<T> { private T item; public void setItem(T item) { this.item = item; } public T getItem() { return item; } }.

Can you give me an example in C#?

Sure! In C#, you can define a generic class like this: public class GenericList<T> { private T[] elements; public void Add(T element) { /* Add element to the list */ } }. This allows you to create a list that can hold any data type.

What about in Python?

Python uses a different approach since it is dynamically typed. However, you can use type hints with generics in the typing module. For example: from typing import List, TypeVar; T = TypeVar('T'); def get_first_element(elements: List[T]) -> T: return elements[0].

Are there any languages that don't support generics?

Yes, some languages like JavaScript and PHP do not have built-in support for generics, but you can achieve similar functionality using other techniques, such as duck typing in Python.