From 31d793fafb2a2540488cf9a717bceceaf837706a Mon Sep 17 00:00:00 2001
From: John Guo <john@johng.cn>
Date: Wed, 10 Nov 2021 00:20:00 +0800
Subject: [PATCH] improve example for package gqueue

---
 container/gqueue/gqueue.go                | 15 ++++++++-------
 container/gqueue/gqueue_z_example_test.go | 12 ++++++++----
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/container/gqueue/gqueue.go b/container/gqueue/gqueue.go
index de2a06504..a778709b3 100644
--- a/container/gqueue/gqueue.go
+++ b/container/gqueue/gqueue.go
@@ -59,7 +59,7 @@ func New(limit ...int) *Queue {
 }
 
 // asyncLoopFromListToChannel starts an asynchronous goroutine,
-// which handles the data synchronization from list <q.list> to channel <q.C>.
+// which handles the data synchronization from list `q.list` to channel `q.C`.
 func (q *Queue) asyncLoopFromListToChannel() {
 	defer func() {
 		if q.closed.Val() {
@@ -87,13 +87,13 @@ func (q *Queue) asyncLoopFromListToChannel() {
 			<-q.events
 		}
 	}
-	// It should be here to close q.C if `q` is unlimited size.
+	// It should be here to close `q.C` if `q` is unlimited size.
 	// It's the sender's responsibility to close channel when it should be closed.
 	close(q.C)
 }
 
 // Push pushes the data `v` into the queue.
-// Note that it would panics if Push is called after the queue is closed.
+// Note that it would panic if Push is called after the queue is closed.
 func (q *Queue) Push(v interface{}) {
 	if q.limit > 0 {
 		q.C <- v
@@ -121,14 +121,15 @@ func (q *Queue) Close() {
 	}
 	if q.limit > 0 {
 		close(q.C)
-	}
-	for i := 0; i < defaultBatchSize; i++ {
-		q.Pop()
+	} else {
+		for i := 0; i < defaultBatchSize; i++ {
+			q.Pop()
+		}
 	}
 }
 
 // Len returns the length of the queue.
-// Note that the result might not be accurate as there's a
+// Note that the result might not be accurate as there's an
 // asynchronous channel reading the list constantly.
 func (q *Queue) Len() (length int) {
 	if q.list != nil {
diff --git a/container/gqueue/gqueue_z_example_test.go b/container/gqueue/gqueue_z_example_test.go
index cb2b4696d..d561335ee 100644
--- a/container/gqueue/gqueue_z_example_test.go
+++ b/container/gqueue/gqueue_z_example_test.go
@@ -65,10 +65,14 @@ func ExampleQueue_Push() {
 		q.Push(i)
 	}
 
-	fmt.Println(q.Len())
+	fmt.Println(q.Pop())
+	fmt.Println(q.Pop())
+	fmt.Println(q.Pop())
 
 	// Output:
-	// 10
+	// 0
+	// 1
+	// 2
 }
 
 func ExampleQueue_Pop() {
@@ -113,7 +117,7 @@ func ExampleQueue_Len() {
 
 	fmt.Println(q.Len())
 
-	// Output:
+	// May Output:
 	// 2
 }
 
@@ -126,6 +130,6 @@ func ExampleQueue_Size() {
 	// Size is alias of Len.
 	fmt.Println(q.Size())
 
-	// Output:
+	// May Output:
 	// 2
 }