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HC9-9. Haskell Chapter 9 Practical Tasks : Creating-parameterized-and-recursive-types |
This topic explores creating parameterized and recursive types in Haskell, extending the ability to define custom types. It begins with parameterizing types, showing how to create flexible and reusable abstractions. This includes parameterizing type synonyms for improved readability and parameterizing data types to allow them to work with multiple types. The concept of recursive data types is then introduced, enabling structures that reference themselves. Examples include Tweet me a river (a practical example of recursion), a sequence of nodes (linked list-like structures), and a tree of nodes (hierarchical data structures). The lesson also touches on kinds, which describe the type of a type, and concludes with the newtype keyword, which provides a way to define new types with minimal overhead. By mastering these concepts, developers can build more expressive and efficient data structures in Haskell. |
