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//> using dep "com.lihaoyi::os-lib:0.9.3"

import os._

object Tree extends App {

  def listFiles(path: os.Path, depth: Int = 0): Unit = {
    if (os.isDir(path)) {
      for (subPath <- os.list(path)) {
        println("  " * depth + subPath.last)

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case class BinaryTree(info: String, left: Option[BinaryTree], right: Option[BinaryTree])

object Application extends App {

  val firstLeftFirstLeft = BinaryTree("firstLeftFirstLeft", None, None)
  val firstLeftFirstRight = BinaryTree("firstLeftFirstRight", None, None)

  val firstRightFirstLeft = BinaryTree("firstRightFirstLeft", None, None)

  val firstLeft = BinaryTree("firstLeft", Some(firstLeftFirstLeft), Some(firstLeftFirstRight))

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---
- hosts: webservers
  vars:
    http_port: 80
    max_clients: 200
  remote_user: root
  tasks:
  - name: ensure apache is at the latest version
    yum: name=httpd state=latest
  - name: write the apache config file

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[india]
host1
host2

[japan]
host3
host4

[asia:children]
India

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all:
  hosts:
    mail.example.com
  children:
    webservers:
      hosts:
        foo.example.com:
        bar.example.com:
    dbservers:
      hosts:

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[mailservers]
mail.example.com

[webservers]
foo.example.com
bar.example.com

[dbservers]
one.example.com
two.example.com

PKOfficial

blockchain0 -- bd4824d8ee63fc82392a6441444166d22ed84eaa6dab11d4923075975acab938

blockchain1 -- db0b9c1cb5e9c680dfff7482f1a8efad0e786f41b6b89a758fb26d9e223e0a10

blockchain2 -- 8f0532cd22055fb7599aa48f38501dcd46e61712ab49a02f840f5545830e9260

blockchain3 -- eb61c3724d6da33605084d2d232bba0563cb82f4ad82c101b42f23c2e86277ef

blockchain4 -- 1af101f70897bf501779b7b2e413ae7144aba5b97e24890c71ba2a1d9c518d20

PKOfficial

import scala.concurrent._
import scala.concurrent.duration._

import akka.actor.{Actor, ActorRef, ActorSystem, Props}
import akka.pattern.ask
import akka.util.Timeout

// KillMe case object to stop an actor
case object KillMe