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._

davegurnell

{
  "shell_cmd": "highlight -O rtf -t 2 -K 32 -k 'PragmataPro' --syntax scala --style slides $file_path/$file_name | pbcopy"
}

davegurnell

# Switch to the "user package" directory on your hard drive:
cd 'Library/Application Support/Sublime Text 3/Packages/User/'

# Create a .sublime-keymap file containing the desired keyboard shortcut:
echo '[{ "keys": ["ctrl+super+r"], "command": "reveal_in_side_bar" }]' > 'Custom Keys.sublime-keymap'

davegurnell

Shapeless Gitter

Keep in touch and up-to-date with the latest shapeless news here:

https://gitter.im/milessabin/shapeless

Shapeless Code and Material

The shapeless codebase is on Miles' Github:

davegurnell

trait FooPlugin {
  def name: String =
    // Get rid of synthetic '$'s in generated class names for singleton objects:
    getClass.getSimpleName.filterNot(_ == '$')

  // TODO: Insert Plugin Methods  
}

object FooPlugin1 extends FooPlugin
object FooPlugin2 extends FooPlugin

davegurnell

  case class Director(firstName: String, lastName: String, yearOfBirth: Int)

  case class Film(title: String, yearOfRelease: Int, imdbRating: Double, director: Director)

  val eastwood = new Director("Clint", "Eastwood", 1930)
  val mcTiernan = new Director("John", "McTiernan", 1951)
  val nolan = new Director("Christopher", "Nolan", 1970)
  val someBody = new Director("Just", "Some Body", 1990)

  val memento = new Film("Memento", 2000, 8.5, nolan)

davegurnell

object TypeclasseDemo {

  // The parts of the type class pattern are:
  //
  //   1. the "type class" itself -- a trait with a single type parameter;
  //
  //   2. type class "instances" for each type we care about,
  //      each marked with the `implicit` keyword;
  //
  //   3. an "interface" to the type class -- one or more methods

davegurnell

Introduction / Motivation
Curriculum---what you teach
 - How to present Scala (OO, functional)
 - Design patterns
Pedagogy---how you teach it
Technology to support teaching
Examples to motivate different students
Who Can Support It / Develop It
Why Invest in Learning Scala?

davegurnell

import shapeless._
import slick.ast.TypedType
import scala.reflect.ClassTag

trait GenericColumnTypeImplicits {
  // This definition summons a column type for a type Pk provided:
  //  - Pk is a case class with a single field of type Underlying;
  //  - Slick can summon a column type for Underlying.
  //
  // It conflicts with MappedTo,