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Basic features absent in Java

• First-class functions
• Implicit parameters / conversions
• Pattern matching, case classes
• Type inference
• Higher-kinded types (abstraction over type constructors)
• Monadic for comprehensions
• Variance annotations
• Interfaces with behavior (traits)

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  // ...
    val connection = factory.newConnection()
    changeInnerPriority(connection,
      config.get[Int]("tq.connectionPriority").getOrElse(Thread.NORM_PRIORITY))
  // ...

  def changeInnerPriority(connection: com.rabbitmq.client.Connection,
                     priority: Int): Unit = {
    def getHostAddressAsString: String = {
      connection.getAddress.getHostAddress

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<?php

/* Pass in by reference! */
function graph_amo_rabbit_prod_report ( &$rrdtool_graph ) {

    global $context,
           $hostname,
           $mem_shared_color,
           $mem_cached_color,
           $mem_buffered_color,

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  config.vm.define :puppet do |app_config|
    app_config.vm.customize ["modifyvm", :id, "--name", "puppet", "--memory", "512"]
    app_config.vm.box = "precise_with_puppet" 
    app_config.hosts.name = 'puppet'
    app_config.vm.host_name = 'puppet'
    app_config.vm.forward_port 22, 2222, :auto => true
    app_config.vm.forward_port 80, 4561
    app_config.vm.network :hostonly, "33.13.13.01"
    app_config.vm.provision :shell do |shell|
      shell.path = "../puppet_master_setup.sh"

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abstract class Cake {
  def top: String
  def middle: String
  def bottom: String
  override def toString = top
}
 
trait Cherry { this: Cake =>
  def top = "cherry on top of " + middle
}

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# make sure this mode is enabled under administrator: Set-ExecutionPolicy RemoteSigned
# use a batch file like this:
# C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Vbox\rabbits-headless.ps1


$items = @( 'vagrant-rabbitmq-cluster_1351840619', 'vagrant-rabbitmq-cluster_1351840685', 'vagrant-rabbitmq-cluster_1351840745', 'vagrant-rabbitmq-cluster_1351840804' )

Foreach ($item in $items) {
	$p = '-s ' + $item
	start-process 'C:\ProgramsX\Oracle\VirtualBox\VBoxHeadless.exe' $p -WindowStyle Hidden

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//From what I can tell the main things to tools to use are map, fold and lift.

//When you want to get something out of a validation regardless of
//whether it is a success or a failure
//(analogous to option's 'getOrElse') use fold:

class Example {

val s = 1.success[String]
// s: scalaz.Validation[String,Int] = Success(1)

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Is socket.push(bytes) all you need to program Realtime Web apps?

One of the goals of Play2 architecture is to provide a programming model for what is called Realtime Web Applications.

Realtime Web Applications

Realtime Web Applications are applications that make use of Websockets, Server Sent Events, Comet or other protocols offering/simulating an open socket between the browser and the server for continuous communication. Basically, these applications let users work with information as it is published - without having to periodically ping the service.

There are quite a few web frameworks that target the development of this type of application: but usually the solution is to simply provide an API that allows developers to push/receive messages from/to an open channel, something like:

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using Umbraco.Core;
using Umbraco.Core.Services;
using Umbraco.Web.Mvc;
using Umbraco.Web.Routing;

namespace Our.Umbraco
{
	public class MyApplication : ApplicationEventHandler
	{
		protected override void ApplicationStarting(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)

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package org.apache.hadoop.examples;

import java.io.IOException;
import java.util.StringTokenizer;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;