scala - How to clone an iterator?

Question

Suppose I have an iterator:

val it = List("a","b","c").iterator

I want a copy of it; my code is:

val it2 = it.toList.iterator

It's correct, but seems not good. Is there any other API to do it?

Answer 1

The method you are looking for is duplicate.

scala> val it = List("a","b","c").iterator
it: Iterator[java.lang.String] = non-empty iterator

scala> val (it1,it2) = it.duplicate
it1: Iterator[java.lang.String] = non-empty iterator
it2: Iterator[java.lang.String] = non-empty iterator

scala> it1.length
res11: Int = 3

scala> it2.mkString
res12: String = abc