ezhulenev

trait MyOption[A] {
  def fold[B](n: => B, s: A => B): B

  // Define the usual Option API.
  //
  // * Constructors (on the object)
  // some
  // none
  // * methods
  // map

ezhulenev

object DatomicPricing {
  object Schema extends VersionedSchemaComponent("0.0.1") {
    object ns {
      val pricing = new Namespace("Pricing")
    }

    val isIndexed = true
    val isComponent = true

    val quoteId    = Attribute(ns.pricing / "QuoteId",   SchemaType.string,  Cardinality.one).withUnique(Unique.identity)

ezhulenev

{-# LANGUAGE FlexibleContexts           #-}
{-# LANGUAGE PolyKinds                  #-}
{-# LANGUAGE RankNTypes                 #-}
{-# LANGUAGE ScopedTypeVariables        #-}
{-# LANGUAGE DataKinds                  #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE MultiParamTypeClasses      #-}
{-# LANGUAGE RoleAnnotations            #-}
{-# LANGUAGE TypeFamilies               #-}
{-# LANGUAGE TypeOperators              #-}

ezhulenev

# In case you had some strange python installation
# NOTE: .pydistutils.cfg seems to be not compatible with brew install python
# areas I needed to clean before installation
# clean up ~/Library/Python
# clean up .local

# preconditions:
# xcode with command line tools installed
xcode-select --install

ezhulenev

object ServerSparkContext {

  private[this] lazy val _sqlContext = {
    val conf = new SparkConf()
      .setAppName("....")
    val sc = new SparkContext(conf)

    // TODO: Bug in Spark: http://stackoverflow.com/questions/30323212
    val ctx = new HiveContext(sc)
    ctx.setConf("spark.sql.hive.convertMetastoreParquet", "false")

ezhulenev

object InstantInsanity extends App {

  type Cube = Seq[Char]

  val cubes: Seq[Cube] = Seq("BGWGBR", "WGBWRR", "GWRBRR", "BRGGWW").map(_.toSeq)

  // Rotate a cube 90 degrees over its Z-axis, leaving up and down in place.
  def rot: Cube => Cube = { case Seq(u, f, r, b, l, d) => Seq(u, r, b, l, f, d) }

  // Twist a cube around the axis running from the upper-front-right

ezhulenev

object InstantInsanity extends App {

  // scalastyle:off

  def undefined[T]: T = ???
  def ⊥[T]: T = undefined

  trait R
  trait G
  trait B