agolovenko

object Ema {
  def apply(period: Int)(data: Vector[Double]): Vector[Double] = {
    if (period < 1) throw new IllegalArgumentException(s"Period ($period) is smaller than 1")
    if (period > data.size) throw new IllegalArgumentException(s"Period ($period) is bigger than data size (${data.size})")

    val factor = 2d / (period + 1)

    data.iterator
      .drop(1)
      .scanLeft(data.head) { (prevEma, value) => value * factor + (1d - factor) * prevEma }

agolovenko

import akka.actor.Scheduler

import scala.concurrent.duration.FiniteDuration
import scala.concurrent.{ExecutionContext, Future, Promise}

object DelayedFuture {
  def apply[T](scheduler: Scheduler, delay: FiniteDuration)(body: => T)(implicit ec: ExecutionContext): Future[T] = {
    val delayPromise = Promise[Unit]()
    scheduler.scheduleOnce(delay)(delayPromise.success(()))

agolovenko

import akka.actor.Scheduler

import scala.concurrent.duration.FiniteDuration
import scala.concurrent.{ExecutionContext, Future, Promise}

object TimeoutFuture {
    private class CancellableExecution[T](body: => T) extends Function[Unit, T] {
      private val runningThread = new AtomicReference[Thread](null)
      private val isCancelled   = new AtomicBoolean(false)

agolovenko

final case class InformationSize(size: Double, unit: InformationUnit) extends Ordered[InformationSize] {
  import InformationSize.{safeAdd, safeDivide, safeMultiply}
  import InformationUnit._

  if (size < 0d) throw new IllegalArgumentException(s"Unsupported negative size: $size")

  def toBits: Double      = to(Bit)
  def toKiloBits: Double  = to(KiloBit)
  def toMegaBits: Double  = to(MegaBit)
  def toBytes: Double     = to(Byte)