小编yu.*_*sun的帖子

val signList1 = Set("(", "[", " VIA ")
val signList2 = Set('(', '[', " VIA ")
val returnStr2 = "xx VIA yy" 
var returnStr3 = returnStr2  
signList2.foreach(e => {
   val pos = returnStr2.indexOf(e)
   if (pos == 0) {
     returnStr3 = returnStr2.substring(pos + 1).trim
   }
   else if (pos > 0) {
     returnStr3 = returnStr2.substring(0, pos).trim
   }
}) 
println(returnStr3)

returnStr3应该是xx,而它被赋予xx VIA yy如果我使用signList2同时给予xx当我使用signList1.这是为什么现象呢？欣赏它.

implicit val ord:Ordering[String] = Ordering.by(_.length)
var nameQueue = new PriorityQueue[String]()
nameQueue.+=("SINES","YINE","WIRAEUS")
nameQueue.foreach(println)

输出是:

WIRAEUS
YINE
SINES

这看起来令人困惑.任何人都可以帮助解释订购的机制吗？