What are some practical applications of functors in Haskell?
An example of an AI chatbot conversation about functors in Haskell and their applications.
What are some practical applications of functors in Haskell?
Functors in Haskell are used to apply functions over wrapped values. A common application is in data structures like lists and Maybe.
Can you give me an example of using a functor with a Maybe type?
Sure! You can use the fmap function to apply a function to a value inside a Maybe. For example: fmap (+1) (Just 2) results in Just 3.
What about using functors with lists?
With lists, you can also use fmap. For instance, fmap (*2) [1, 2, 3] will give you [2, 4, 6].
Are there any other functor applications I should know about?
Yes! Functors are also used in parsing libraries and for handling asynchronous computations with the IO type.
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