Scala-将迭代器转换为地图

Question

How to get from an Iterator like this

val it = Iterator("one","two","three","four","five")

a map like

Map(four -> 4, three -> 5, two -> 3, five -> 4, one -> 3)

 var m = Map[String, Int]()
      while (it.hasNext) {
        val cell = it.next()
        m += (cell -> cell.length())
      }

this is a solution using var but I'd like to use just Immutable and val variable.

If I use the for yield statement the returning object would be a Iterator[Map] and I do not want that:

val m = for(i<- it if it.hasNext) yield Map(i->i.length())

Answer 1

您可以只使用地图：

val m = it.map(c => c -> c.length).toMap