malcolmgreaves

language: scala
scala:
- 2.10.4
jdk:
- oraclejdk8
- oraclejdk7
services: mongodb
script:
- sbt scoverage:test
- sbt coveralls

malcolmgreaves

object DiffieHellmanMerkle {

  import java.math.BigInteger
  import scala.language.implicitConversions
  import scala.util.Random

  def main(args: Array[String]): Unit =
    println(
      diffieHellmanMerkle(generator = 3, modulus = 17, alicePrivateKey = 54, bobPrivateKey = 24)
    )

malcolmgreaves

#Scala for comprehension translation helper

"For comprehension" is a another syntaxe to use map, flatMap and withFilter (or filter) methods.

yield keyword is used to aggregate values in the resulting structure.

This composition can be used on any type implementing this methods, like List, Option, Future...

malcolmgreaves

// create file:
sudo vim /usr/share/applications/intellij.desktop

// add the following
[Desktop Entry]
Version=13.0
Type=Application
Terminal=false
Icon[en_US]=/home/rob/.intellij-13/bin/idea.png
Name[en_US]=IntelliJ

malcolmgreaves

#!/usr/bin/env bash

# Quinn Comendant <quinn@strangecode.com>
# https://gist.github.com/quinncomendant/3be731567e529415d5ee
# Since 25 Jan 2015
# Version 1.1

CMD=$1;

if [[ `id -u` = 0 ]]; then

malcolmgreaves

// Implementing the publishing Pusher REST API
// @see http://pusher.com/docs/rest_api
// with Play (scala) Framework 
// @see http://scala.playframework.org/

class Pusher {
  val appId = Play.configuration.getProperty("pusher.appId")
  val key = Play.configuration.getProperty("pusher.key")
  val secret = Play.configuration.getProperty("pusher.secret")
  

malcolmgreaves

//send messages via Pusher API in play 2.4
import play.api.libs.json.{ Writes, Json }
import play.api.libs.ws.{ WSResponse, WSClient }
import play.api.libs.ws.ning.NingWSClient
import java.security.MessageDigest
import java.math.BigInteger
import javax.crypto.Mac
import javax.crypto.spec.SecretKeySpec
import scala.concurrent.{ ExecutionContext, Future }

malcolmgreaves

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

malcolmgreaves

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

malcolmgreaves

import akka.actor.IO._
import akka.actor.{Props, IO, IOManager, Actor, ActorSystem}
import akka.event.Logging
import akka.util.ByteString
import java.net.InetSocketAddress

class TCPEchoServer(port: Int) extends Actor {
  val log = Logging(context.system, this)

  val state = IterateeRef.Map.async[IO.Handle]()(context.dispatcher)