diff -r 820ee59121b4 -r 85c08391a090 src/array_list.c
--- a/src/array_list.c	Thu Nov 17 18:29:59 2022 +0100
+++ b/src/array_list.c	Thu Nov 17 18:32:59 2022 +0100
@@ -190,7 +190,29 @@
         struct cx_list_s *list,
         size_t index
 ) {
-    return 1;
+    /* out-of-bounds check */
+    if (index >= list->size) {
+        return 1;
+    }
+
+    cx_array_list *arl = (cx_array_list *) list;
+
+    /* just move the elements starting at index to the left */
+    int result = cx_array_copy(
+            &arl->data,
+            &list->size,
+            &list->capacity,
+            index,
+            ((char *) arl->data) + (index + 1) * list->itemsize,
+            list->itemsize,
+            list->size - index,
+            &arl->reallocator
+    );
+    if (result == 0) {
+        /* decrease the size */
+        list->size--;
+    }
+    return result;
 }
 
 static void *cx_arl_at(