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In the previous chapters, we covered some existing Haskell types and typeclasses. In this chapter, we'll learn how to make our own and how to put them to work! Algebraic data types intro So far, we've run into a lot of data types. Bool, Int, Char, Maybe,etc. But how do we make our own? Well, one way is to use the data keyword to define a type. Let's see how the Bool type is defined in the standar
Dynamic Dispatch in Haskell, or: How Can I Make My Code Extendable? I came across a Haskell question which highlighted a common confusion. I'mgoing to explain how to get around that! The person who asked the question wants tocreate some sort of command-line interface in Haskell, and was wondering how to structure their code. In particular, they were curious about how to represent, in the code, t
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