Github user jodersky commented on a diff in the pull request:
https://github.com/apache/spark/pull/11113#discussion_r52237857
--- Diff:
examples/src/main/scala/org/apache/spark/examples/streaming/ActorWordCount.scala
---
@@ -63,11 +63,11 @@ class FeederActor extends Actor {
def receive: Receive = {
case SubscribeReceiver(receiverActor: ActorRef) =>
println("received subscribe from %s".format(receiverActor.toString))
- receivers = LinkedList(receiverActor) ++ receivers
+ receiverActor +=: receivers
case UnsubscribeReceiver(receiverActor: ActorRef) =>
println("received unsubscribe from
%s".format(receiverActor.toString))
- receivers = receivers.dropWhile(x => x eq receiverActor)
+ receivers.dropWhile(x => x eq receiverActor)
--- End diff --
The difference between the two:
> The iterator and all traversal methods of this class visit elements in
the order they were inserted.
So it really depends if ordering is important or not
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