What are some examples of using the Either type in Haskell?

Can you explain the Either type in Haskell with some examples?

Sure! The Either type in Haskell is used for computations that can result in two possible outcomes: a success (Right) or a failure (Left). For example, you might use it to represent a function that can either return a valid result or an error message.

Can you show me a code example of using Either?

Absolutely! Here's a simple example:

safeDivide :: Double -> Double -> Either String Double
safeDivide _ 0 = Left "Cannot divide by zero"
safeDivide x y = Right (x / y)

In this function, if the divisor is zero, it returns a Left with an error message; otherwise, it returns a Right with the result.

How can I handle the result of an Either type?

You can use pattern matching to handle the result. For example:

case safeDivide 10 0 of
    Left err -> putStrLn err
    Right result -> print result

This will print the error message if there's an error, or the result if the division is successful.

Are there any libraries that enhance the Either type?

Yes, libraries like 'either' provide additional functions to work with Either types more conveniently, such as 'either' for handling both cases in a more functional style.