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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ScalaSbtSettings">
    <option name="linkedExternalProjectsSettings">
      <SbtProjectSettings>
        <option name="externalProjectPath" value="$PROJECT_DIR$" />
        <option name="useAutoImport" value="true" />
      </SbtProjectSettings>
    </option>
  </component>

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Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

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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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import Stream._

  /** A possibly finite stream that repeatedly applies a given function to a start value.
   *
   *  @param start the start value of the stream
   *  @param f     the function that's repeatedly applied
   *  @return      the stream returning the possibly finite sequence of values `start, f(start), f(f(start)), ...`
   */

  def iterate[A](f: A => A, a: A): Stream[A] = unfold((x: A) => Some((x, f(x))), a)

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/*
 * OpenSimplex (Simplectic) Noise in Java.
 * (v1.0.1 With new gradient set and corresponding normalization factor, 9/19/14)
 */

public class OpenSimplexNoise {

	private static final double STRETCH_CONSTANT_3D = -1.0 / 6;
	private static final double SQUISH_CONSTANT_3D = 1.0 / 3;
	

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#![feature(phase)]
#[phase(plugin, link)] extern crate log;
extern crate green;
extern crate rustuv;

use std::io;
use std::os;
use std::io::{Listener,Acceptor,TcpStream};

#[start]

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trait Isomorphism[A, B] {
  def fw: A => B
  def bw: B => A
}
 
object Isomorphism {
  implicit def anyIso[A](a: A) = new {
    def as[B](implicit ev: Isomorphism[A, B]) = ev fw a
  }
 

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import scala.language.implicitConversions

/**
 * @author gwenzek
 *
 */

class ArgsOps(ops: Map[String, OptionalParam], val args: Array[String]){
    def apply(op: String) = ops(op)
}

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How to install latest GHC 7.10.1 + cabal 1.22.3.0 from source on ubuntu

for your convinience these instuction is available as:
gist
git repo

ghc

ubuntu prerequisites

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# Installing graphite dependencies
apt-get install -y python2.6 python-pip python-cairo python-django python-django-tagging
apt-get install -y libapache2-mod-wsgi python-twisted python-memcache python-pysqlite2 python-simplejson 
pip install whisper
pip install carbon
pip install graphite-web

# Setup a vhost by grabbing the example the graphite team released on their repo.
# In this file, you'll provide the url used to access to your Graphite dashboard
wget https://raw.github.com/tmm1/graphite/master/examples/example-graphite-vhost.conf -O /etc/apache2/sites-available/graphite