What is variance in generics?
An example of an AI chatbot conversation about variance in generics in programming.
Can you explain what variance in generics means?
Sure! Variance in generics refers to how subtyping between more complex types relates to subtyping between their component types.
What are the different types of variance?
There are three main types of variance: covariance, contravariance, and invariance. Covariance allows a type to be substituted with its subtypes, while contravariance allows for substitution with its supertypes.
Can you give an example of covariance?
Absolutely! In a list of animals, if 'Dog' is a subtype of 'Animal', a List<Dog> can be treated as a List<Animal> in a covariant context.
What about contravariance?
In contravariance, if you have a function that takes an Animal, you can pass it a Dog. This allows for more general types to be used.
Use ChatGPT in Telegram
Get this answer and more from ChatGPT in Telegram, try it for free!
Get Started For FreeWhat can MagicBuddy do?
The Friendly AI in Your Pocket
Powered by advanced language models trained on billions of online words and conversations, MagicBuddy delivers friendly and helpful chat on demand.
Ask questions and get answers. Crack jokes and get laughs. Or even get writing ideas and study help. MagicBuddy's conversational intelligence allows for a truly unique and useful chat experience.
Curious? Try these prompts:
Telegram's Best AI-Powered Chatbot
MagicBuddy is incredibly easy to use and the responses are lightning fast! 🥇
Impressive! MagicBuddy is my go-to AI assistant. It’s quick, accurate, and user-friendly.
Sending voice messages makes it easier to use in the middle of the day and the answers are super fast.
Love it! A friend of mine told me about it and it has made my life so much easier. It’s like having a helpful friend in my pocket!
I use 2 months already, simply amazing! MagicBuddy delivers answers in a snap. It’s a must-have tool for staying informed!
Game-changer! MagicBuddy’s speed and accuracy are unmatched. It’s my secret weapon for productivity
Talk to ChatGPT on Telegram
Say Hello to Your New Telegram BFF - Try MagicBuddy Free!
Get Started For Free