November 2015
Intermediate to advanced
166 pages
3h 14m
English
Content preview from Haskell Design PatternsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 3. Patterns of Composition
Function composition is a fundamental part of functional programming. This chapter is concerned with exploring the composition characteristics of the fundamental type-classes: Functor, Applicative Functor, Arrow, and Monad. We will see that Functor embeds into Applicative Functor, which embeds into Arrow, which embeds into Monad. After exploring Monad composition, we'll also look into Monad transformers (a technique for composing different types of Monad). As we move through the successive types, from the most general (Functor) to the most powerful (Monad), we will see how they differ in the ways they can be composed.
Note that this chapter does not have the last word on composition patterns, for example, in the ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.