Scala: Val顺序的随机列表

Question

我有一些val应该随机来到结果列表。下面是代码:

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(????)
}

1. 我如何标记每个报价的分数，以便能够计算。
2. 我如何根据名称的score随机选择报价，并且shuffle也做订单?

例如，如果John(name)有40(分数)，结果可以是quotes2+quotes3+quotes4或quotes4+quotes5或quotes1+quotes2+quotes5

Answer 1

我想我可能会从所有的引号和它们各自的分数开始。

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

然后以尽可能多的方式组合它们。

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

将其转换为由各自的分数和键合的Map。

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

现在你调用查找所有的引号，当组合时，总和为给定的金额。

// 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，既然你已经问过两次了，并且得到了很好的答案，我认为这不会是一个问题。