From f5bf6c88bb035b49f2207c48b27c535865bf4b71 Mon Sep 17 00:00:00 2001
From: Jian Han <jianhan@mail.com>
Date: Fri, 4 May 2018 19:38:39 +1000
Subject: [PATCH] example of confinement

---
 concurrency/confinement/adhoc/main.go       | 16 ++++++++++++++++
 concurrency/iterator_error_handling/main.go |  2 --
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/concurrency/confinement/adhoc/main.go b/concurrency/confinement/adhoc/main.go
index 8bb1ab6..e433578 100644
--- a/concurrency/confinement/adhoc/main.go
+++ b/concurrency/confinement/adhoc/main.go
@@ -24,4 +24,20 @@ func main() {
 	for num := range handleData {
 		fmt.Println(num)
 	}
+
+	doWork := func(strings <-chan string) <-chan interface{} {
+		completed := make(chan interface{})
+		go func() {
+			defer fmt.Println("doWork exited.")
+			defer close(completed)
+			for s := range strings {
+				// Do something interesting
+				fmt.Println(s, "TTT")
+			}
+		}()
+		return completed
+	}
+	doWork(nil)
+	// Perhaps more work is done here
+	fmt.Println("Done.")
 }
diff --git a/concurrency/iterator_error_handling/main.go b/concurrency/iterator_error_handling/main.go
index 32fc812..0057b06 100644
--- a/concurrency/iterator_error_handling/main.go
+++ b/concurrency/iterator_error_handling/main.go
@@ -107,8 +107,6 @@ func v2() {
 		"https://insights.stackoverflow.com/survey/2017",
 		"https://hackernoon.com/top-10-python-web-frameworks-to-learn-in-2018-b2ebab969d1a",
 		"https://blog.kowalczyk.info/article/1Bkr/3-ways-to-iterate-in-go.html",
-		"A",
-		"B",
 	}
 	for result := range checkStatus(done, urls...) {
 		if result.Error != nil {