briandealwis

# turn a jar with a Main-Class into a stand alone executable

(echo '#!/usr/bin/env java -jar'; cat blahblah.jar) > blah

# turn a jar with a particular main clas into a stand alone executable

(echo '#!/usr/bin/env java -jar package.MainClass'; cat blahblah.jar) > blah

milessabin

object Tuples {
  import HLists._

  implicit def tuple1ToHList[A](t : Product1[A]) = new { def hlisted : A :: HNil = t._1 :: HNil }
  implicit def tuple2ToHList[A, B](t : Product2[A, B]) = new { def hlisted : A :: B :: HNil = t._1 :: t._2 :: HNil }
  implicit def tuple3ToHList[A, B, C](t : Product3[A, B, C]) = new { def hlisted : A :: B :: C :: HNil = t._1 :: t._2 :: t._3 :: HNil }

  implicit def hListToTuple1[A](h : A :: HNil) = new { def tupled : Tuple1[A] = Tuple1(h.head) }
  implicit def hListToTuple2[A, B](h : A :: B :: HNil) = new { def tupled : (A, B) = (h.head, h.tail.head) }
  implicit def hListToTuple3[A, B, C](h : A :: B :: C :: HNil) = new { def tupled : (A, B, C) = (h.head, h.tail.head, h.tail.tail.head) }

tabdulradi

Scala Script Runner

Make sure you have coursier installed

chmod +x test.scala
./test.scala

First time it will download scala-compiler (and depending on your config maybe GraalVM) then cache a bootstrap runner. Next time it will run much faster using the cached runner (depending on you config can be native program!).

carlosedp

// Run with scala-cli httpserver.scala
// Save logback.xml file into ./resources dir
// Before generating native image binary, run first as above and make a real access to the URL
// so the native-image-agent can generate the metadata in ./resources dir.
// Then generate native image binary with: scala-cli package --native-image httpserver.scala
//> using scala "3.3.0"
//> using lib "dev.zio::zio:2.0.15"
//> using lib "dev.zio::zio-http:3.0.0-RC2"
//> using lib "dev.zio::zio-logging-slf4j2::2.1.13"
//> using lib "ch.qos.logback:logback-classic:1.4.8"