The Road to Scala 3

Post by pkolaczk » Sun, Dec 22, 2019, 8:03 AM UTC

xvilka wrote: post #27

maxaf wrote: post #6

Earlier quoted context omitted.

I won’t even mention the anecdata from my own workplace. I’ll only say that within my extended network people are frantically rewriting Scala bits in other languages. Those who are stuck with it (because of, say, extensive prior investment into Spark) are scrambling to come up with alternate solutions. Put your ear to the ground, and you too will hear it.

There is an ongoing work on creating Spark alternative in Rust[1][2]. Hopefully, that could help. [1] https://github.com/rajasekarv/native_spark [2] https://medium.com/@rajasekar3eg/fastspark-a-new-fast-native...

Post by solicode » Sun, Dec 22, 2019, 8:21 AM UTC

cerved wrote: post #154

MrBuddyCasino wrote: post #144

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>With all that said, the church of FP and the hascalator community is a problem for Scala. Overly dogmatic & academic functional programming styles don't have a place in production systems. Isn't Scala minus the problems you mentioned just Kotlin?

Does Kotlin have the maybe monad?

Post by sorokod » Sun, Dec 22, 2019, 8:46 AM UTC

dxxvi wrote: post #162

apta wrote: post #161

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> Java 14 records, pattern matching and switch expressions are like a joke compared to Scala case class and pattern matching. What does Scala's pattern matching do that Java's (upcoming) doesn't? > For example, does Java 14 Stream have any method equivalent to `collect` in Scala, which is a combination of filter and map? Not that I'm aware, but then again, I don't see the large advantage compared to making two separa…

An example of Scala's pattern matching: case class Person(name: String, age: Int) // a collection of 3 people val c1 = Vector(Person("A", 5), Person("B", 6), Person("C", 4)) // now I want a collection of people who have age > 4 and then their ages are doubled val c2 = c1 collect { case Person(name, age) if age > 4 => Person(name, age*2) } How do you write it in Java 14? Want something lazy like Java streams? It's Laz…

    data class Person (val name: String, val age: Int)
    val c1 = listOf(Person("A", 5), Person("B", 6), Person("C", 4))
    val c2 = c1.filter{ it.age > 4 }.map{ it.copy(age = it.age*2) }

Post by Bahamut » Sun, Dec 22, 2019, 9:46 AM UTC

ccthr wrote: post #139

Bahamut wrote: post #109

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FWIW, I'm in a FAANG and finding Scala devs is even a problem within my own org and team. We've resorted to teaching largely Java devs Scala on the job with mixed results. A former senior manager who made the decision supposedly viewed going all in on Scala as a mistake in large part due to the huge time loss in ramping people up & problems hiring. I like what I've used of the language at work, although I tend to wri…

Hiring Java devs is the problem. It's a lowest common denominator language. Try looking for Ruby or JS devs. It's a lot easier to teach someone from a dynamic background how to leverage a type system than it is to teach an imperative developer to write side effect free code. State is a crutch.

Post by The_rationalist » Sun, Dec 22, 2019, 11:18 AM UTC

EdwardDiego wrote: post #147

dmit wrote: post #133

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Kotlin is not the future of anything. They got the Android boost and still, two years later, all they have to offer is a molasses-slow improvement pace and a shitty dev experience in their signature IDE (which also happens to be made by the same company). Last time I tried to create a Kotlin project in IDEA, it couldn't provide type information on hover. The Kotlin dialect of Gradle was barely supported enough to be…

We're writing new apps in Kotlin instead of Java, works fine for us. shrug Vert.x , Ktor apps, Kafka streaming apps. IDEA handles it absolutely fine these days, I suspect you last tried it sometime ago. Can't comment on the Gradle stuff though, I vastly prefer Maven.