chan update

Author: 刘建秋

EN/channel/channel-1.md

@@ -53,11 +53,11 @@ The results and meaning of ok:
 -`true`: read the channel data, not sure if it is closed, maybe the channel has saved data, but the channel is closed
 -`false`: The channel is closed and no data is read.
 
-* 3. Use select to handle multiple channels
+* 3. Use select to handle multiple channel
 Scenes
-When multiple channels need to be processed simultaneously, but only the channel that occurs first is processed
+When multiple channel need to be processed simultaneously, but only the channel that occurs first is processed
 
-Select can monitor the situation of multiple channels at the same time, and only handle unblocked cases. When the channel is nil, the corresponding case is always blocked, regardless of reading or writing. Special attention: Under normal circumstances, writing to the nil channel is panic.
+Select can monitor the situation of multiple channel at the same time, and only handle unblocked cases. When the channel is nil, the corresponding case is always blocked, regardless of reading or writing. Special attention: Under normal circumstances, writing to the nil channel is panic.
 
 
 * 4. Use the channel statement to control read and write permissions
@@ -95,11 +95,11 @@ func consumer (inCh <-chan int) {
 }
 ```
 
-* 5. Use buffered channels to enhance concurrency
+* 5. Use buffered channel to enhance concurrency
 Scenes
 asynchronous
 
-There are buffer channels for multiple coroutines to process at the same time, which can improve concurrency to a certain extent.
+There are buffer channel for multiple coroutines to process at the same time, which can improve concurrency to a certain extent.
 usage
 ```
 // no buffer
@@ -149,7 +149,7 @@ All coroutines that read ch will receive the close (ch) signal
 
 * 9. Use chan struct {} as signal channel
 Scenes
-Use channels to pass signals instead of data
+Use channel to pass signals instead of data
 
 When there is no data to pass, pass an empty struct
 

EN/channel/channel.md

@@ -5,7 +5,12 @@
 
 * Channle essential data structure pipeline queue, data is first-in first-out.
 * With ** thread safety mechanism **, when multiple go programs are accessed, no shackles are needed, which means that the channel itself is thread safe.
-* Channels are typed.
+* channel are typed.
+* Notes for closed channel:
+  - 1. Sending another value on a closed channel causes a panic.
+  - 2. Receiving a closed channel will get the value until the channel is empty.
+  - 3. Performing a receive operation on a closed channel with no value will result in a zero value of the corresponding type.
+  - 4. Closing a closed ** channel causes panic.
 
 ### channel traversal mode
 
@@ -68,7 +73,7 @@ break
 Notes on traversal method:
 Summary: Through the above verification, in order to ensure the robustness of the program, when designing the program, it is best to read and write the channel separately in the sub-go process. After writing the data, remember to close the channel, so as to avoid blocking and cause the main program to crash, and at the same time capture the subroutine error information.
 
-* Channels do not need to be closed as often as files. Only when you do not have any data to send, or you want to explicitly end the range loop, etc., do you close the channel;
+* channel do not need to be closed as often as files. Only when you do not have any data to send, or you want to explicitly end the range loop, etc., do you close the channel;
 * After closing the channel, it is impossible to send data to the channel again (after a panic error is caused, the receiver immediately returns zero);
 * After closing the channel, you can continue to receive data from the channel;
 * For nil channel, no matter sending or receiving, it will be blocked.

zh_CN/channel/channel.md

@@ -6,6 +6,11 @@
 * channle 本质数据结构管道队列，数据是先进先出。
 * 具有**线程安全机制**，多个go程访问时，不需要枷锁，也就是说channel本身是线程安全的。
 * channel是有类型的。
+* 已关闭通道注意事项：
+ - 1.对一个关闭的通道再发送值就会导致panic。
+ - 2.对一个关闭的通道进行接收会一直获取值直到通道为空。
+ - 3.对一个关闭的并且没有值的通道执行接收操作会得到对应类型的零值。
+ - 4.关闭一个**已经关闭**的通道会导致panic。
 
 ### channel 遍历模式