One of my methods return a List[(String,Option[Int])]. I convert it into a Set calling toSet[(String,Option[Int])] method of List
question 1 - would this give me a Set[(String,Option[Int])]?
then I have a case class which can map the data of the Tuple(String,Option[Int])
case class TagCount
case class TagCount (tag:String,count:Int)
Is it possible that using the toSet method of the List, I actually get a Set[TagCount] instead of `Set[(String,Option[Int])]
I notice that toSet can accept type argument B >: (String,Option[Int]) but I can't figure out how to make TagCount >: (String,Option[Int])
def toSet[B >: A]: Set[B]
You can try:
def foo(in: List[(String, Option[Int])]): Set[TagCount] =
in.toSet.collect {
case (key, Some(c)) => TagCount(key, c)
}
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