Scala：Val顺序的随机列表

Question

我有一些 val 应该随机出现在结果列表中。这是代码：

def motivation(name:String, score:Int){
val quote1 = "You're not lost. You're locationally challenged." //score=10
val quote2 = "Time is the most valuable thing a man can spend." //score=20
val quote3 = "At times one remains faithful to a cause." //score=10
val quote4 = "Only because its opponents do not cease to be insipid." //score=10
val quote5 = "Life can be complicated." //score=20

case Some(score) => val quoteRes = shufle(????)
}

如何标记每个引述的分数以便计算。
我如何根据姓名 score 随机选择引号并按 shuffle 顺序排列？

例如，如果约翰（名字）有 40（分数），结果可能是 quotes2+quotes3+quotes4 或 quotes4+quotes5 或 quotes1+quotes2+quotes5

Answer 1

我想我可能会从所有引语和它们各自的分数开始。

val quotes = Map( "quote this" -> 10
                , "no quote" -> 20
                , "quoteless" -> 10
                )

然后尽可能多地组合它们。

// all possible quote combinations
val qCombos = (1 to quotes.size).flatMap(quotes.keys.toList.combinations)

将其转换为 Map 由他们各自的总分作为键控。

// associate all quote combinations with their score total
val scoreSum = qCombos.groupBy(_.map(quotes).sum)

现在您调用查找所有报价，这些报价合并后总和为给定金额。

// get all the quote combinations that have this score total
scoreSum(20) 
//res0: IndexedSeq[List[String]] = Vector(List(no quote), List(quote this, quoteless))

至于以随机顺序呈现结果，既然你已经问过这个问题，并且得到了很好的答案，我认为这不会成为问题。

Scala：Val顺序的随机列表

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