The book doesn't explain how to setup scala3 at all, it assumes you know how to install programs which is fine, but the scala-lang website is also failing at educating others on how to install scala3, only showing how to install scala3-repl and scala3-compiler.

The first real coding exercise of the book instructs the reader to create a basic script and invoke scala on it, however the sbt and Coursier tooling do not provide a scala v3 binary, only scala v2 via cs's "setup" command. This scala v2 binary cannot execute the simple @main function that's written for the reader to recreate. There's various StackOverflow, GitHub and other places filled with confusion and frustration and not much assistance on actually getting the code to run.

Literally the hello world example cannot be ran out of the box. You can get around this if you stay in the REPL and just :load your code, I found this after several googling attempts.

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Boris

Scala - tool for 202X

Reviewed in the United States on December 12, 2021

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If you want to learn Scala, this is the only book that you need!
It is big and you will need weeks (or months) to go through it, but whenever you stuck with something, this is book that you will get back to.

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Ryan

A very well-written intro to Scala

Reviewed in the United States on November 18, 2021

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Does a great job of introducing the language piece-by-piece. It’s very interesting to discover how flexible and powerful Scala is.

This book is not for those who are new to programming. It is designed for existing programmers who are interested in learning Scala.

All of the examples are in Scala 3. If you want to see examples in Scala 2 take a look at the fourth edition.

Supposedly there is a second volume in the works called “Advanced Programming in Scala”, which will be a continuation of this book. Looking forward to it!

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Marcelo Rezende Módolo

Direto e prático!

Reviewed in Brazil on December 13, 2021

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Estou gostando bastante da leitura! Ainda não apliquei todos os exemplos, vamos achei didático e consigo acompanhar sem problemas! Todos os exemplos que apliquei até agora foram em um ambiente Linux

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