February 2016
Intermediate to advanced
382 pages
8h 1m
English
Content preview from Scala 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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The Scalaz library
Scala is a functional programming language and as such it supports design patterns based on concepts such as monoids, monads, and others. We already saw these in Chapter 10, Functional Design Patterns – The Deep Theory, and we know the rules they follow and the structure they have. We wrote everything ourselves, but a library already exists that does this for us—Scalaz (https://github.com/scalaz/scalaz). This library is used when we need purely functional data structures.
We have already encountered Scalaz in the previous chapter when we talked about lenses. In the following subsections, we will look at the library from the point of view of monoids, functors, and monads.
Monoids in Scalaz
One of the concepts we looked at in Chapter ...
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