hochgi

object Puzzles {
  
  /**
   * 8 queens
   * https://en.wikipedia.org/wiki/Eight_queens_puzzle
   * generalized to any N
   */
  object Queens {
    
    /**

hochgi

slides for a talk

hochgi

implicit val decodeResultMonad: Monad[DR] = new Monad[DR] {
  override def flatMap[A, B](fa: DR[A])(f: A => DR[B]): DR[B] = fa.flatMap(f)
  override def tailRecM[A, B](a: A)(f: A => DR[Either[A, B]]): DR[B] = f(a) match {
    case DR.Value(Left(aa)) => tailRecM(aa)(f)
    case DR.Value(Right(b)) => DR.Value(b)
    case failedDecodeResult =>
      // scalastyle:off null
      failedDecodeResult.map(_.getOrElse(null.asInstanceOf[B])) // stays DR.failure - map is not applied
      // scalastyle:on null
  }

hochgi

package com.hochgi

package object util {

  sealed trait Value
  case class Attribute(k: String, v: String) extends Value
  case class Content(s: String) extends Value

  case class Tree(label: String, values: List[Value], children: List[Tree])

hochgi

import akka.stream.{Attributes, FlowShape, Inlet, Outlet}
import akka.stream.stage.{GraphStage, GraphStageLogic, InHandler, OutHandler}
import com.typesafe.scalalogging.Logger

object StreamEventInspector {
  def default[T](logger: Logger, context: String, printElem: T => String): StreamEventInspector[T] = {
    val ctx = "[" + context + "] "
    new StreamEventInspector[T](
      () => logger.info(ctx + "upstream completed"),
      ex => logger.error(ctx + "upstream failure", ex),

hochgi

from typing import Optional

class Tree:
    def __init__(self, value: int, children: list):
        self.value = value
        self.children = children # list of Tree

def format_tree(t: Tree) -> str:
    pass

hochgi

package scratch.example;

import java.util.List;

public class Tree {

    int value;
    List<Tree> children;

    public Tree(int value, List<Tree> children) {

hochgi

hochgi

package com.sparkbeyond.engine.util.logging.eventslogger

import java.nio.charset.StandardCharsets

import akka.Done
import ch.qos.logback.core.rolling.{
  FixedWindowRollingPolicy, 
  RollingFileAppender,
  SizeBasedTriggeringPolicy
}

hochgi