jsuereth

<?xml version="1.0" encoding="UTF-8"?>
 
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
 
  <groupId>org.scala-tools.maven-scala-plugin</groupId>
  <artifactId>testJavaAndScala</artifactId>
  <version>1.0-SNAPSHOT</version>
  <name>Test for Java + Scala compilation</name>

jsuereth

Welcome to Scala version 2.8.0.r0-b20090301210344 (Java HotSpot(TM) Client VM, Java 1.6.0_10).
Type in expressions to have them evaluated.
Type :help for more information.

scala> trait ReponseHelper[A];  
defined trait ReponseHelper                            ^

scala> def doSomething[A](x : ReponseHelper[_ <: A]) : A = null.asInstanceOf[A] 
doSomething: [A](ReponseHelper[_ <: A])A                       ^

jsuereth

josh@suereth-desktop:~/projects/blog/s99$ scala
Welcome to Scala version 2.7.1.final (OpenJDK Client VM, Java 1.6.0_0).
Type in expressions to have them evaluated.
Type :help for more information.

scala> def x(one:Int, two:Int, three:Int, four:Int, five:Int, six:Int, seven:int, eight:int, nine:Int, ten:Int, eleven:Int, twelve:Int, thirteen:Int, fourteen:Int, fifteen:Int, sixteen:Int, seventeen:Int, eighteen:Int, nineteen:Int, twenty:Int, twentyone:Int, twentytwo:Int, twentythree:Int) = one + two
x: (Int,Int,Int,Int,Int,Int,int,int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int)Int

scala> x _
<console>:6: error: missing arguments for method x in object $iw;

jsuereth

Welcome to Scala version 2.8.0.r21454-b20100411185142 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_15).
Type in expressions to have them evaluated.
Type :help for more information.

scala> val x : Int => Unit = y => println(y)
x: (Int) => Unit = <function1>

scala> x(v1 = 2)
2

jsuereth

scala> class Foo {
     |   type T = this.type
     |   def cloneit : T = {
     |     val x = new Foo
     |     x match {
     |       case y : T => y
     |       case _ => error("ZOMG")
     |     }
     |   }
     | }

jsuereth

Index: src/library/scala/collection/TraversableLike.scala
===================================================================
--- src/library/scala/collection/TraversableLike.scala	(revision 22850)
+++ src/library/scala/collection/TraversableLike.scala	(working copy)
@@ -313,6 +313,19 @@
     for (x <- this) (if (p(x)) l else r) += x
     (l.result, r.result)
   }
+  /** Partitions this $coll in two ${colls} according to the 
+   * transformation to an Either.

jsuereth

scala> def data(block : Int => Unit) { for(i <- 0 to 10) block(i) }
data: (block: (Int) => Unit)Unit

scala> val x = new Traversable[Int] {                              
     |   def foreach[U](f : Int => U) = {                            
     |     data( f(_) : Unit)                                        
     |   }
     | }
x: java.lang.Object with Traversable[Int] = line15(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

jsuereth

import collection.generic.CanBuildFrom
import util.continuations._

class SuspendableProxy[+T, +Repr <: Iterable[T]](xs: Repr)(implicit cbf : CanBuildFrom[Repr, T, Repr]) {
  private[this] def newBuilder = cbf()

  def foreach[A](body: T => Unit @cps[A]): Unit @cps[A] = {
    val it = xs.iterator
    while (it.hasNext) {
      body(it.next)

jsuereth

scala> def replace(what: String)(rules: List[(String,String)]): String = 
     |     rules.foldLeft(what)((seed,tuple) => 
     |       seed.replaceAll(tuple._1,tuple._2))
replace: (what: String)(rules: List[(String, String)])String

scala> replace("Little Bunny Foo foo")(List("Foo" -> "Pancake", "Bunny" -> "Rabbit"))
res3: String = Little Rabbit Pancake foo


scala>  def recurse(times: Int)(what: => String): String = {

jsuereth

scala>  def recurse(times: Int)(what : String)(how: String => String): String = {
     |     def rpt(times: Int, previous: => String): String = {
     |       println("Agg: " + previous)
     |       times match {
     |         case 0 => println("Done"); previous
     |         case _ => println("Recursing"); rpt(times - 1, how(previous))
     |       }
     |     }
     |     rpt(times, what)
     |   }