Merge pull request #267 from sshanks-kx/zw

4.1 change to .z.W output

Author: JosieMD

docs/kb/deferred-response.md

@@ -18,8 +18,8 @@ You can use `-30!(::)` at any place in the execution path of [`.z.pg`](../ref/do
 Kdb+ tracks which handles are expecting a response. If you try to send a response to a handle that is not expecting one, you’ll see
 
 ```q
-q).z.W / list of socket handles being monitored by kdb+ main thread
-8i 
+q)key .z.W / list of socket handles being monitored by kdb+ main thread
+, 8i 
 q)-30!(8i;0b;`hello`world) / try to send a response of (0b;`hello`world)
 'Handle 8 was not expecting a response msg
   [0]  -30!(8i;0b;`hello`world)

docs/ref/dotz.md

@@ -876,9 +876,21 @@ q)h:hopen ...
 q)h
 3
 q)neg[h]({};til 1000000); neg[h]({};til 10); .z.W
-3| 4000030 70
-q)sum each .z.W
-3| 0
+3| 8000030 110
+q)neg[h]({};til 1000000); neg[h]({};til 10); sum each .z.W 
+3| 8000140
+```
+
+Since 4.1 2023.09.15, this returns `handles!bytes` as `I!J`, instead of the former `handles!list` of individual msg sizes. Use `sum each .z.W` if writing code targetting 4.0 and 4.1
+
+```q
+q)h:hopen ...
+q)h
+6i
+q)neg[h]({};til 1000000); neg[h]({};til 10); .z.W
+6| 8000140
+q)neg[h]({};til 1000000); neg[h]({};til 10); sum each .z.W
+6| 8000140
 ```
 
 

docs/releases/ChangesIn4.1.md

@@ -290,3 +290,7 @@ q)H:hopen each 4#4000;{x""}peach H
 q))
 ```
 [One-shot IPC requests](../ref/hopen.md#one-shot-request) can be used within peach instead.
+
+### .z.W
+
+[.z.W](../ref/dotz.md#zw-handles) now returns `handles!bytes` as `I!J`, instead of the former `handles!list` of individual msg sizes. Use `sum each .z.W` if writing code targetting 4.0 and 4.1.