update

Author: LadyBluenotes

src/routes/reference/reactive-utilities/index-array.mdx

@@ -56,6 +56,7 @@ Mapping function for each index.
 - **Type:** `() => any`
 
 Fallback accessor used when the source array is empty or falsy.
+The mapped result becomes a single fallback entry.
 
 ## Return value
 
@@ -69,6 +70,7 @@ Returns an accessor for the mapped array.
 - The item argument is an accessor.
 - The index argument is a number.
 - Updating an item at the same index updates the corresponding mapped result.
+- Reordering the source array changes which item each index points to instead of moving mapped entries by identity.
 - This is the underlying helper for [`<Index>`](/reference/components/index-component).
 
 ## Examples
@@ -79,13 +81,13 @@ Returns an accessor for the mapped array.
 import { createSignal, indexArray } from "solid-js";
 
 const [source] = createSignal([
-	{ firstName: "Ada", lastName: "Lovelace" },
-	{ firstName: "Grace", lastName: "Hopper" },
+	{ status: "pending" },
+	{ status: "done" },
 ]);
 
 const mapped = indexArray(source, (item, index) => ({
 	index,
-	fullName: () => `${item().firstName} ${item().lastName}`,
+	status: () => item().status,
 }));
 ```