January 2020
Intermediate to advanced
470 pages
11h 13m
English
Content preview from Mastering JavaScript Functional Programming - Second Edition
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Avoiding impure functions
Earlier in this chapter, we saw the more common reasons for using impure functions. Let's now consider how we can reduce the number of impure functions, even if doing away with all of them isn't really feasible. Basically, we'll have two methods for this:
- Avoiding the usage of state
- Using a common pattern, injection, to have impurity in a controlled fashion
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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.