Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20016#discussion_r157925457
--- Diff: examples/src/main/scala/org/apache/spark/examples/HdfsTest.scala
---
@@ -39,7 +39,7 @@ object HdfsTest {
val start = System.currentTimeMillis()
for (x <- mapped) { x + 2 }
val end = System.currentTimeMillis()
- println("Iteration " + iter + " took " + (end-start) + " ms")
+ println(s"Iteration ${iter} took ${(end-start)} ms")
--- End diff --
Let's just write as `$iter` and `$end-start`
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