finished ch16.4 and ch16

.obsidian/workspace.json

@@ -35,6 +35,20 @@
               "title": "Concurrency"
             }
           },
+          {
+            "id": "42d65c7d3f15198d",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
+              "state": {
+                "file": "Async, Await, Futures and Streams.md",
+                "mode": "source",
+                "source": false
+              },
+              "icon": "lucide-file",
+              "title": "Async, Await, Futures and Streams"
+            }
+          },
           {
             "id": "2a974ca5442d705f",
             "type": "leaf",
@@ -231,11 +245,12 @@
       "command-palette:Open command palette": false
     }
   },
-  "active": "2a974ca5442d705f",
+  "active": "42d65c7d3f15198d",
   "lastOpenFiles": [
     "Concurrency.md",
-    "Sync and Send.md",
+    "Async, Await, Futures and Streams.md",
     "Shared State Concurrency.md",
+    "Sync and Send.md",
     "().md",
     "Smart Pointers.md",
     "Simultaneous Code Running.md",
@@ -259,7 +274,6 @@
     "Generic Types Traits and Lifetimes.md",
     "Generics.md",
     "Lifetimes.md",
-    "2025-02-04.md",
     "does_not_compile.svg",
     "Untitled.canvas",
     "Good and Bad Code/Commenting Pratices",