有一个更好的方法吗？

Question

所以我有这段 xml 代码

<schedule>
  <teacher name="Charles Xavier">
    <activities>
      <activity init="7:00" end="7:50" alias="1st period">
        <days>
          <monday></monday>
          <tuesday>room 102</tuesday>
          <wednesday></wednesday>
          <thursday></thursday>
          <friday>room 101</friday>
        </days>
      </activity>
      <activity init="8:00" end="8:50" alias="2nd period">
        <days>
          <monday></monday>
          <tuesday></tuesday>
          <wednesday>room 101</wednesday>
          <thursday></thursday>
          <friday>room 103</friday>
        </days>
      </activity>
    </activities>
  </teacher>
  <teacher name="Moira McTaggert">
    <activities>
      <activity init="7:00" end="7:50" alias="1st period">
        <days>
          <monday></monday>
          <tuesday>room 102</tuesday>
          <wednesday>room 102</wednesday>
          <thursday>room 104</thursday>
          <friday>room 101</friday>
        </days>
      </activity>
      <activity init="8:00" end="8:50" alias="2nd period">
        <days>
          <monday>room 102</monday>
          <tuesday>room 102</tuesday>
          <wednesday>room 103</wednesday>
          <thursday>room 104</thursday>
          <friday>room 103</friday>
        </days>
      </activity>
    </activities>
  </teacher>
</schedule>

到目前为止，scala 代码是

object WeekDay extends Enumeration("Monday", "Tuesday", "Wednesday", "Thursday", "Friday") {
  type WeekDay = Value
  val Monday, Tuesday, Wednesday, Thursday, Friday = Value
}

class Teacher {
  var name: String = _
  var activities: ListBuffer[Activity] = _
}

class Activity {
  var init: String = _
  var end: String = _
  var alias: String = _
  var days: List[Day] = List(new Day(WeekDay.Monday), new Day(WeekDay.Tuesday), new Day(WeekDay.Wednesday),
    new Day(WeekDay.Thursday), new Day(WeekDay.Friday))
}

class Day(val day: WeekDay) {
  var room: String = _     
}

我认为这种方式感觉非常“势在必行”，可以更多的 scala 代码吗？

最后我试图完成的是这样的方法（见下文），所以任何关于解决这个问题的最佳方法的提示都将不胜感激。

var overlappedRooms = teachers.getOverlappedRooms("7:00", WeekDay.Tuesday)

这应该给我们一些信息，说明 Charles xavier 的 102 房间与 Moira 的 102 房间重叠

注意。这只是一个学习目的项目。 :)

Answer 1

许多 Scala 支持者试图避免可变对象，尽管有些人过分恕我直言。你可以试试这样的事情：

class Teacher(val name:String)

class Activity(
  val init:String,
  val end:String,
  val alias:String,
  val days:List[Day])

type Roster: Map[Teacher, List[Activity]]

请注意，我已将排班从教师中移出，因为它实际上并不是教师的财产。您可能会考虑为它开设一个新课程。可能活动也需要与它所在的日子分开考虑。我不确定为什么您的 Day 课程中有“空间”。我怀疑您的对象建模在这里需要一些帮助。