February 2019
Beginner to intermediate
180 pages
4h 4m
English
Content preview from ReasonML Quick Start Guide
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Support for immutability and purity
Reason isn't just about having a static type system. Also important is the fact that Reason is immutable by default. Immutability is an important concept in functional programming. In practice, using immutable data structures (data structures that can't change) results in safer, easier-to-reason-about, and more maintainable code than their mutable counterparts. This will be a recurring theme throughout this book.
Purity is another important concept in functional programming. A function is said to be pure if its output is determined only by its input, without observable side-effects. In other words, a pure function doesn't do anything outside of returning a value. The following is an example of a pure function: ...
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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.