What are some examples of type classes in Haskell?

What are some examples of type classes in Haskell?

In Haskell, type classes are a way to define functions that can operate on different types. For example, the Eq type class allows for equality checks. If a type is an instance of Eq, you can use the == operator to compare values of that type.

Can you give me more examples of type classes?

Sure! Another common type class is Ord, which is used for types that can be ordered. If a type is an instance of Ord, you can use comparison operators like <, >, and <=.

What about type classes for numeric types?

For numeric types, Haskell has the Num type class, which includes basic arithmetic operations. Types like Int, Float, and Double are instances of Num, allowing you to use operators like +, -, *, and /.

How do I create my own type class?

To create your own type class, you use the class keyword followed by the class name and its methods. For example:

class MyClass a where
    myMethod :: a -> String
``` This defines a type class `MyClass` with a method `myMethod`.