Scala, Java, Unix, MacOS tutorials (page 49)

Inspired by a conversation with a friend recently about “trying to love everyone,” I dug into things a little more and found the following information from Ram Dass, Zen masters, the Maharaj-ji (Neem Karoli Baba), and Yoda.

As I keep trying to figure out what Ram Dass means when he says, “love everyone,” I dug through his book, be love now and found these two quotes:

Here’s a quick example of how to use Scala 3 (Dotty) enums, including using them as constructor and method parameters, and in a match expression. First, some Scala 3 enums for a pizza store application:

As a brief note, if you want to use the Scala 3 nightly build as your REPL, one way to do that is with this project I just put on Github. Just:

1. Clone that project
2. cd into its directory
3. Type sbt to start sbt
4. Type console to start a Scala 3 REPL inside sbt
5. Use the latest, greatest Scala syntax, as shown in this image:

The hack that makes this work is in the build.sbt file, and shown here in bold:

lazy val root = project
  .in(file("."))
  .settings(
    name := "Scala3Nightly",
    description := "Lets me use the Scala 3 nightly build",
    version := "0.1.0",
    scalaVersion := dottyLatestNightlyBuild.get,
    useScala3doc := true,
  )

As shown in the build.sbt file, I found that scalaVersion hack on this page: github.com/scala/scala3-example-project.

Sorry, I have to run off to a meeting now, but if you want to use the latest Scala 3 nightly build as your REPL, I hope this is helpful.

(Also, as shown in this gitter.im/dotty link, you can use Coursier for this purpose, but in this case it’s much easier to use this sbt hack to create a Scala 3 REPL with the latest nightly build, imho.)

In a lucid dream this morning a bunch of people came into my apartment uninvited. All but one of them were maintenance people, and they immediately started renovating my apartment. I argued with them that a little notice would have been nice.

While that was going on, I saw that the other person was a Tibetan monk. While the maintenance people started drilling and cutting in various locations, the monk walked around the apartment breaking all of my things. He’d pick up a glass and let it drop to the floor and break, or work harder to break other things, slamming them to the ground. I ran over to him and asked, “Why are you breaking all of my things?”

He didn’t reply, but broke some DVDs in his hands. For some reason this made me more lucid in the dream, so I stepped on some of the DVDs he had dropped to the floor so I could crunch them more. “I get it,” I said, “it’s the whole ‘impermanence’ thing, right?” Then I thought of something and said, “Stay right here for a moment. Break something if you need to, but I’ll be right back.”

Then I went over to my DVD collection and grabbed my Dalai Lama video collection. I went back to the monk, handed him the DVDs, and said, “Here, you can break these, too. Or watch them. I don’t care.”

Then I remembered that my tv had just started on fire when the maintenance people did something, but it didn’t matter, the monk took the DVDs and sat down silently.

(January 28, 2020)