From ae6e14bc62eedf690244056370ba967b401ebbd6 Mon Sep 17 00:00:00 2001
From: Francesc Verdugo <f.verdugo.rojano@vu.nl>
Date: Mon, 8 Sep 2025 11:30:14 +0200
Subject: [PATCH] Enhancing solutions for julia_distributed notebook.

---
 docs/src/solutions_for_all_notebooks.md | 26 ++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/docs/src/solutions_for_all_notebooks.md b/docs/src/solutions_for_all_notebooks.md
index b7355a3..5047492 100644
--- a/docs/src/solutions_for_all_notebooks.md
+++ b/docs/src/solutions_for_all_notebooks.md
@@ -48,11 +48,12 @@ heatmap(x,y,values)
 
 ```julia
 f = () -> Channel{Int}(1)
-chnls = [ RemoteChannel(f,w) for w in workers() ]
-@sync for (iw,w) in enumerate(workers())
+worker_ids = workers()
+chnls = [ RemoteChannel(f,w) for w in worker_ids ]
+@sync for (iw,w) in enumerate(worker_ids)
     @spawnat w begin
         chnl_snd = chnls[iw]
-        if w == 2
+        if iw == 1
             chnl_rcv = chnls[end]
             msg = 2
             println("msg = $msg")
@@ -70,23 +71,26 @@ chnls = [ RemoteChannel(f,w) for w in workers() ]
 end
 ```
 
-This is another possible solution.
+This is another possible solution that does not use remote channels.
 
 ```julia
-@everywhere function work(msg)
+@everywhere function work(msg,iw,worker_ids)
     println("msg = $msg")
-    if myid() != nprocs()
-        next = myid() + 1
-        @fetchfrom next work(msg+1)
+    if iw < length(worker_ids)
+        inext = iw+1
+        next = worker_ids[iw+1]
+        @fetchfrom next work(msg+1,inext,worker_ids)
     else
-        @fetchfrom 2 println("msg = $msg")
+        @fetchfrom worker_ids[1] println("msg = $msg")
     end
+    return nothing
 end
 msg = 2
-@fetchfrom 2 work(msg)
+iw = 1
+worker_ids = workers()
+@fetchfrom worker_ids[iw] work(msg,iw,worker_ids)
 ```
 
-
 ## Matrix-matrix multiplication
 
 ### Exercise 1