Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/3869#discussion_r22490186
--- Diff:
mllib/src/test/scala/org/apache/spark/mllib/linalg/VectorsSuite.scala ---
@@ -175,6 +177,33 @@ class VectorsSuite extends FunSuite {
assert(v.size === x.rows)
}
+ test("sqdist") {
+ val random = new Random(System.nanoTime())
+ for (m <- 1 until 1000 by 10) {
+ val nnz = random.nextInt(m) + 1
+
+ val indices1 = random.shuffle(0 to m - 1).toArray.slice(0,
nnz).sorted
--- End diff --
`0 until m` should be the same as `0 to m - 1`. However, `shuffle` doesn't
recognize `... until ..`. Searched on Google and found
https://issues.scala-lang.org/browse/SI-6948
~~~scala
scala> import scala.util.Random
import scala.util.Random
scala> val random = new Random
random: scala.util.Random = scala.util.Random@1e16c33f
scala> random.shuffle(0 until 10)
<console>:10: error: Cannot construct a collection of type
scala.collection.AbstractSeq[Int] with elements of type Int based on a
collection of type scala.collection.AbstractSeq[Int].
random.shuffle(0 until 10)
^
scala> random.shuffle(0 to 10 - 1)
res1: scala.collection.immutable.IndexedSeq[Int] = Vector(0, 1, 3, 9, 7, 4,
2, 8, 6, 10, 5)
~~~
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