Human readable duration format

object HumanTime {

    def formatDuration(seconds: Int): String = {
    var num = Array[Int](0,0,0,0,0)
    var names = Array[String]( "second", "minute", "hour", "day", "year")
    var countNotNull = 0

    if(seconds==0) return "now"

    num(1) = seconds/60
    num(0) =seconds%60
    if(num(0)!=0) countNotNull+=1
    if(num(1)%60>0) countNotNull+=1
    if(num(1)>=60){
      num(2) =num(1)/60
      num(1) %=60
      if(num(2)%24>0) countNotNull+=1
      if(num(2)>=24){
        num(3) =num(2)/24
        num(2) %=24
        if(num(3)%365>0) countNotNull+=1
        if(num(3)>=365){
          num(4) = num(3)/365
          num(3) %= 365
          if(num(4)!=0) countNotNull+=1
        }
      }
    }
    var str =""
    for(i <- 4 to 0 by -1) {
      if(num(i)==0) {
      }
      else{
        if(num(i)>1)
          str+= num(i) + " " + names(i) + "s"
        else if(num(i) == 1)
          str += num(i) + " " + names(i)
        if(countNotNull>2){
          str+= ", "
          countNotNull-=1
        }
        else if (countNotNull==2){
          str+=" and "
          countNotNull-=1
        }
      }
    }
    return str
  }

}

------------------------------------------------------------------------

object HumanTime {

  def formatDuration(seconds: Int): String =
    (List(("year", 31536000, 100000), ("day", 86400, 365), ("hour", 3600, 24), ("minute", 60, 60), ("second", 1, 60))
      .map {
        case (unit, duration, modulo) => (seconds / duration % modulo, unit)
      }
      .collect {
        case (duration, unit) if duration == 1 => s"$duration $unit"
        case (duration, unit) if duration != 0 => s"$duration ${unit}s"
      })
      match {
        case Nil => "now"
        case List(single) => single
        case list => s"${list.init.mkString(", ")} and ${list.last}"
      }
}