klaeufer

var shared = 0
val lock = new java.lang.Object

def unsafe =
  val local = shared
  Thread.sleep(0)
  shared = local + 1

def safe =
  lock.synchronized:

klaeufer

import scalaz._            // general scalaz support
import syntax.monoid._     // monoid syntax as used below
import std.anyVal._        // some instances to work with
import std.list._          // some more instances
import std.option._        // some more instances
import syntax.std.option._ // postfix methods for options

object monoidExample {
  val res0 = ∅[Int]        // or: mzero[Int]
  val res1 = 3 |+| 4       // or: 3 `mappend` 4

klaeufer

import org.scalacheck.Properties
import org.scalacheck.Prop.forAll

object IntAbelianGroup extends Properties("Int") {

  property("Associativity") = forAll { (a: Int, b: Int, c: Int) =>
    (a + b) + c == a + (b + c)
  }
}
// Closure

klaeufer

*.suo
*.obj
*.pdb
*.user
*.vspscc
*.bak
*.cache
*.log
*.lib
[Bb]in

klaeufer

a.out
*.swp
*.o
*.orig
*.hi
*.lkshs
*.iml
.idea/
dist/
out/

klaeufer

#!/bin/bash

# put in ~/.curlrc: user=BintrayUser:BintrayAPIKey

ORG=$1
PACKAGE=$2

curl -i -H "Content-Type: application/json" -d "{ \"name\":\"${PACKAGE}\",\"labels\":[\"android\",\"scala\",\"cse\",\"mobile\",\"oop\",\"designpatterns\"],\"website_url\":\"http://lucoodevcourse.github.io\",\"issue_tracker_url\":\"https://github.com/${ORG}/${PACKAGE}/issues\",\"github_repo\":\"${ORG}/${PACKAGE}\",\"github_release_notes_file\":\"README.md\",\"public_download_numbers\":true,\"public_stats\":true,\"vcs_url\":\"https://github.com/${ORG}/${PACAKGE}\",\"licenses\":[\"MIT\"] }" https://bintray.com/api/v1/packages/${ORG}/generic

klaeufer

def pi(n: Long): Double = {
  var i = 0L
  var c = 0L
  while (i < n) {
    val x = math.random
    val y = math.random
    if (x * x + y * y <= 1) c += 1
    i += 1
  }
  4.0 * c / n

klaeufer

#!/bin/bash

# Download and run this script in a Codio terminal.
# (Workaround for Codio included at the bottom.)
#
# You should set these variables in /home/codio/.bashrc:
#
# export ANDROID_HOME=$HOME/android-sdk-linux
# export LD_LIBRARY_PATH=$HOME/lib32:$LD_LIBRARY_PATH                                                                              
#

klaeufer

val lines = scala.io.Source.stdin.getLines

var count = 0

for (l <- lines) {
  println(l)
  count += 1
}

println("count = " + count)

klaeufer

scala> def f(i: Int) = i * i
f: (i: Int)Int

scala> Iterator.iterate(2)(f)
res11: Iterator[Int] = non-empty iterator

scala> res11 takeWhile { _ < 10 } foreach { println }
2
4