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Discussion and and code examples for the book Hands-on Scala Programming

Home Page: https://www.handsonscala.com/

License: Other

HTML 15.42% TSQL 53.35% Scala 24.28% Shell 0.92% Jsonnet 0.12% Java 0.04% JavaScript 0.04% CSS 5.82%

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handsonscala's Issues

Chapter 2 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 2. Important topics will be folded into the issue description.

Chapter 10 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 10. Important topics will be folded into the issue description.

printing the values of an array string

how scala handles printing of the contents of an array is like doing assembly language. i found two ways to do it:

val X = new ArrayString
X(0)="Hello"
X(1)=", "
X(2)="world!"

X.foreach(println) will print:
Hello
,
world!

in that order or format.

another way is:
println(X.mkString("")) will print:
Hello, world!

but why so primitive!?

can't we just say:
println(&X) OR
println($X)

and be done with it? far easier to read too.

Chapter 5 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 5. Important topics will be folded into the issue description.

Chapter 6 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 6. Important topics will be folded into the issue description.

Chapter 20 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 20. Important topics will be folded into the issue description.

Chapter 4 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 4. Important topics will be folded into the issue description.

Chapter 7 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 7. Important topics will be folded into the issue description.

PDF downloads as HTML file containing raw postscript

I just bought your book as PDF, but unfortunately it downloads with an ".html" extension and/or mime type so it opens to a page of raw postscript code on my iPad, which is really not very useful. By downloading on a computer, and changing the extension manually, I could open the file and load it in to books. But really it would make life a lot easier if you could change this.

Thanks!

Chapter 8 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 8. Important topics will be folded into the issue description.

Chapter 19 Notes, Errata, and Discussion

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Chapter 17 Notes, Errata, and Discussion

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Chapter 3 Notes, Errata, and Discussion

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Chapter 15 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 15. Important topics will be folded into the issue description.

Installing Mill issue

Hello - i am @ section 2.4 "Installing Mill". I have downloaded the example-3.zip package and unzipped it.

Chapter 11 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 11. Important topics will be folded into the issue description.

Chapter 14 Notes, Errata, and Discussion

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Chapter 12 Notes, Errata, and Discussion

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testing with utest

I copied build.sc (2.18.scala) on page 31 of the book into a VSCode /mill setup. I keep getting:
compiling 1 Scala source to /.../.../WorkSpaces/ScalaWS/HOS/chap2/out/mill-build/compile.dest/classes ...
[error] /.../.../WorkSpaces/ScalaWS/HOS/chap2/build.sc:8:23: not found: type Tests
[error] object test extends Tests
[error] ^

Know what is wrong, everything works as long as I leave out the testing parts

Failed to resolve ivy dependencies:Boxed Exception

I am trying to import build with metals:

// build.sc
import mill._, scalalib._

object foo extends ScalaModule{
  def scalaVersion = "2.13.2"
  object test extends Tests{
    def ivyDeps = Agg(ivi"com.lihaoyi::utest:0.7.4")
    def testFrameworks = Seq("utest.runner.Framework")
  }
}

And I get
Failed to resolve ivy dependencies:Boxed Exception
I tried with both 0.8.0 and 0.9.9 Mill versions

Line 8 in e39750b

result

Chapter 16 Notes, Errata, and Discussion

Thread to discuss anything and everything about Chapter 16. Important topics will be folded into the issue description.