Scala 3 slowed us down?

Post by gedy » Sun, Dec 07, 2025, 4:59 PM UTC

pjmlp wrote: post #6

The only issue I have with Scala 3 is Python envy, they should not have come up with a second syntax, and pushing it as the future. If anything is slowly down Scala 3 is that, including the tooling ecosystem that needs to be updated to deal with it.

    val month = i match
        case 1  => "January"
        case 2  => "February"
        // more months here ...
        case 11 => "November"
        case 12 => "December"
        case _  => "Invalid month"  // the default, catch-all
    
    // used for a side effect:
    i match
        case 1 | 3 | 5 | 7 | 9  => println("odd")
        case 2 | 4 | 6 | 8 | 10 => println("even")
    
    // a function written with 'match':
    def isTrueInPerl(a: Matchable): Boolean = a match
        case false | 0 | "" => false
        case _ => true

Post by bdangubic » Sun, Dec 07, 2025, 5:06 PM UTC

gedy wrote: post #11

pjmlp wrote: post #6

The only issue I have with Scala 3 is Python envy, they should not have come up with a second syntax, and pushing it as the future. If anything is slowly down Scala 3 is that, including the tooling ecosystem that needs to be updated to deal with it.

As a former Scala fan, wow you aren't kidding, wth val month = i match case 1 => "January" case 2 => "February" // more months here ... case 11 => "November" case 12 => "December" case _ => "Invalid month" // the default, catch-all // used for a side effect: i match case 1 | 3 | 5 | 7 | 9 => println("odd") case 2 | 4 | 6 | 8 | 10 => println("even") // a function written with 'match': def isTrueInPerl(a: Matchable): B…

Post by a24j » Sun, Dec 07, 2025, 5:21 PM UTC

bdangubic wrote: post #13

gedy wrote: post #11

Earlier quoted context omitted.

As a former Scala fan, wow you aren't kidding, wth val month = i match case 1 => "January" case 2 => "February" // more months here ... case 11 => "November" case 12 => "December" case _ => "Invalid month" // the default, catch-all // used for a side effect: i match case 1 | 3 | 5 | 7 | 9 => println("odd") case 2 | 4 | 6 | 8 | 10 => println("even") // a function written with 'match': def isTrueInPerl(a: Matchable): B…

madness :)

Post by Kwpolska » Sun, Dec 07, 2025, 5:23 PM UTC

Post by aarroyoc » Sun, Dec 07, 2025, 5:29 PM UTC

hylaride wrote: post #14

derriz wrote: post #9

I was involved in a Scala point version migration (2.x) migration a few years ago. I remember it being painful. Although I recall most of the pain was around having lots of dependencies and waiting for libraries to become available. At the time Scala was on upswing because it had Spark as its killer app. It would have been a good time for the Scala maintainers to switch modes - from using Scala as a testbed for inter…

Outside of Android work, has Kotlin really taken over? My understanding is that Java added a lot of functional programming and that took a lot of wind out of Scala's sails (though Scala's poor tooling certainly never helped anything).