Codes

Scala

Scala

Installation

Arch Linux

pacman -S scala

SDKMAN!

sdk install scala

Binary

# Download scala-{version}.tar.gz from https://github.com/lampepfl/dotty/
tar xzf scala-{version}.tar.gz
mv scala-{version} /usr/local
export PATH=/usr/local/scala-{version}:$PATH

Examples

Fibonacci Numbers

// Fibonacci Numbers
object fib_scala {
    def fib(n: Int): Int =
        if (n < 2)
            n
        else
            fib(n - 2) + fib(n - 1)

    /* slower
    def fib(n: Int): Int = n match {
        case 0 => 0
        case 1 => 1
        case _ => fib(n - 2) + fib(n - 1)
    }
    */

    def main(args: Array[String]) = {
        // run as script
        var n = Integer.parseInt(args(0))
        // run as byte code
        //var n = Integer.parseInt(args(1))
        println(fib(n))
    }
}

/*
example
    run as script:
        scala fib.scala 39
    compile:
        scalac fib.scala
    run as byte code:
        scala fib_scala 39
*/