davegurnell

import akka.actor._
import akka.pattern.ask
import akka.routing._
import akka.util.Timeout
import scala.concurrent._
import scala.concurrent.duration._
import scala.concurrent.ExecutionContext.Implicits.global

object Speaker {
  case class EventuallySay(phrase: String)

davegurnell

import scala.language.experimental.macros
import scala.reflect.macros.blackbox.Context

object PrintForMacros {
  def printFor[A](expr: A): A =
    macro PrintForMacros.printForMacro[A]
}

class PrintForMacros(val c: Context) {
  import c.universe._

davegurnell

macro di {
  case {
    _(function ($args (,) ...) {
      $body...
    })
  } => {
    letstx $names... = _.map(
      #{ $args... },
      function(ident) {
        return makeValue(ident.token.value, ident);

davegurnell

trait DatabaseLayer {
  def dependency: Int
}

trait ConcreteDatabaseLayer extends DatabaseLayer {
  def dependency: Int = 100
}

trait DatabaseResource1 {
  this: DatabaseLayer =>

davegurnell

sealed trait PhpValue {
  def \(field: PhpValue): Seq[PhpValue] = Seq.empty[PhpValue]
  def \\(field: PhpValue): Seq[PhpValue] = Seq.empty[PhpValue]
}

sealed trait PhpArrayLike extends PhpValue {
  def fields: Map[PhpValue, PhpValue]

  override def \(field: PhpValue): Seq[PhpValue] =
    fields.toSeq.collect {

davegurnell

#!/usr/bin/env bash

git checkout master
git branch -D nohistory

for branch in `git branch | cut -c2-`
do
  echo "========== $branch =========="
  git checkout $branch
  git branch -D nohistory

davegurnell

lazy val chat = project.in(file(".")).enablePlugins(PlayScala)

scalaVersion in chat := "2.11.4"

libraryDependencies in chat ++= Seq(
  jdbc,
  anorm,
  "org.postgresql"    %  "postgresql" % "9.3-1101-jdbc4",
  "org.webjars"       %  "bootstrap"  % "3.0.2",
  "org.scalatestplus" %% "play"       % "1.2.0"           % "test"

davegurnell

def userId(username: String): Option[Int] =
  Some(1)

def mostRecentOrderId(userId: Int): Option[Int] =
  Some(2)

def orderCost(orderId: Int): Option[Int] =
  Some(3)

def mostRecentOrderCost(username: String): Option[Int] =

davegurnell

Spark

Group leader:

• Building Spark app.
• Not in production.
• Wants to know more about how people are building apps.
• Currently runs jobs by hand using Spark EC2 scripts. What else is available?

davegurnell

scalaVersion := "2.11.2"

resolvers += "Underscore Training" at "https://dl.bintray.com/underscoreio/training"

libraryDependencies += "underscoreio" %% "doodle" % "0.1.0"

initialCommands in console := """
  |import doodle.core._
  |import doodle.syntax._
  |import doodle.jvm._