NOV., 2022: My new book, Learn Functional Programming The Fast Way, is currently an Amazon Java and functional programming #1 new release. The book is now available in three formats:
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PDF Format
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Paperback
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Kindle
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For OOP developers: Start learning FP the fast way
This is a small book, but it’s a small book with a HUGE goal:
To help object-oriented programming (OOP) developers who use languages like Java, Kotlin, Python, Swift, and C++ learn the concepts that take you to the cusp of using Scala’s two main functional programming libraries: Cats Effect and ZIO.
Furthermore, the book does that in less than 270 pages of text that are written in a simple, conversational style — just like I was pair programming with you, or mentoring you in a small classroom — with plenty of example FP code.
To be clear, when I say “the cusp” of using those FP libraries, when you finish the book, I want you to be able to look at the initial examples in the Cats Effect and ZIO documentation and think:
“I know what they’re doing, and I know why they’re doing it.”
I believe this book is the fastest, simplest way for OOP developers to start learning FP.
Free preview
You can now download a large, free preview of the book at the following link:
Click here to download the free preview (PDF format)
The full book is 250 pages, and this free preview is 128 pages, so it really is a large free preview.
If you’re interested in learning functional programming, I hope you enjoy this book, and I hope it’s helpful.
Errata (bugs/issues in the book)
In the place where I use this in the book:
type Money = Double
I should have used something like this instead:
type Money = BigDecimal // do this type Money = Long // OR this
Bonus: Functional Programming resources
As an ongoing resource for anyone who has read this book, here are some of the best FP resources I know:
- My much larger FP book, Functional Programming, Simplified
- Video: Real-world functional programming in Scala using ZIO, by Yonas Ghidei
- The ZIO website
- The Cats Effect website
More-complicated functional programming resources
- Bartosz Milewski’s PDF, The Dao of FP is rich in category theory
All the best,
Al
books by alvin
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