sortega

• Coursera's Learning how to Learn course is starting again. https://www.coursera.org/learn/learning-how-to-learn If you prefer the written version, take a look at Barbara Oakley book https://www.amazon.com/Mind-Numbers-Science-Flunked-Algebra-ebook/dp/B00G3L19ZU

• Take a look at how we think with Kahneman's Thinking Fast and Slow http://www.amazon.com/Thinking-Fast-Slow-Daniel-Kahneman/dp/0374533555

• Uncle Bob inspires you to keep learning as a professional. http://www.amazon.com/Clean-Coder-Conduct-Professional-Programmers/dp/0137081073

sortega

import scala.util.parsing.combinator.RegexParsers

sealed trait Command
case object FlushCommand extends Command
case class LookupKey(key: String) extends Command
case class SetKey(key: String, blob: String) extends Command

object Grammar extends RegexParsers {

  val id: Parser[String] = """[a-zA-Z][a-zA-Z0-9]*""".r

sortega

package sandbox;

import java.util.Arrays;
import java.util.Collections;
import java.util.EnumSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.function.BiConsumer;
import java.util.function.BinaryOperator;

sortega

scala> def yearlyImprove(dailyImprove: Double): Double =
     |   Seq.fill(365)(1 + dailyImprove).product - 1
yearlyImprove: (dailyImprove: Double)Double

scala> yearlyImprove(0.001)
res0: Double = 0.44025131342952095

sortega

package lines

import java.io.File
import scala.annotation.tailrec

object LineCount {

  def of(file: File): Int = {
    val source = scala.io.Source.fromFile(file)
    try of(source.toStream)

sortega

package distro

import scala.annotation.tailrec
import scala.util.Random

trait Distro[A] {
  def eventSet: Set[A]
  def probOf(event: A): BigDecimal
  def map[B](f: A => B): Distro[B]
  def flatMap[B](f: A => Distro[B]): Distro[B]

sortega

class Sieve(maxNumber: Int) {
  private val candidates = Array.fill(maxNumber + 1)(true)

  def run(): Unit = {
    for (index <- 2 to maxNumber) {
      if (candidates(index)) {
        crossOutMultiples(index)
      }
    }
  }

sortega

import akka.actor._

object BackPressureSieve extends App {

  val DefaultChunkSize = 1024
  val MinChunkSize = DefaultChunkSize * 3 / 4
  val MaxNumber = 500000

  case object GetCandidates
  case class Candidates(values: Vector[Int])

sortega

import akka.actor._

object SimpleSieve extends App {

  val MaxNumber = 500000

  case object NoMoreCandidates

  class Filter extends Actor {

sortega

package bowling

class Game {

  trait Line {
    def addRoll(pins: Int): Unit
    def score: Int
  }

  class Frame(next: Line) extends Line {