September 2017
Beginner to intermediate
396 pages
9h 46m
English
Content preview from Haskell Cookbook
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Working with Applicatives
An Applicative is a type class that is somewhere between a Functor and a Monad. An Applicative takes a Functor one step further. A Functor talks about application of a function a -> b to a data type f a, whereas an Applicative talks about application of a data type of a function f (a -> b) to a data type f a.
In this recipe, we will work with Maybe and Either data types, and see how we can work with Applicative instances in the context of these data types.
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