January 2020
Intermediate to advanced
470 pages
11h 13m
English
Content preview from Mastering JavaScript Functional Programming - Second Edition
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Behaving Properly - Pure Functions
In Chapter 3, Starting Out with Functions – A Core Concept, we considered functions as the key elements in Functional Programming (FP), went into detail about arrow functions, and introduced some concepts, such as injection, callbacks, polyfilling, and stubbing. In this chapter, we'll have the opportunity to revisit or apply some of those ideas. We will also do the following:
- Consider the notion of purity, and why we should care about pure functions—and impure functions as well!
- Examine the concept of referential transparency.
- Recognize the problems implied by side effects.
- Show some advantages of pure functions.
- Describe the main reasons behind impure functions.
- Find ways to minimize the number of impure ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.