diff --git a/experiments/2024-12-09/src/ui.rs b/experiments/2024-12-09/src/ui.rs
index ea34e0696..6a14a94ef 100644
--- a/experiments/2024-12-09/src/ui.rs
+++ b/experiments/2024-12-09/src/ui.rs
@@ -23,7 +23,7 @@ impl OperationView {
     }
 
     pub fn select_last(&mut self) {
-        let last_index = self.operations().len().saturating_sub(1);
+        let last_index = self.last_index();
         self.selected = Some(last_index);
     }
 
@@ -49,4 +49,8 @@ impl OperationView {
             .nth(selected)
             .map(|(op, _)| op)
     }
+
+    fn last_index(&self) -> usize {
+        self.operations().len().saturating_sub(1)
+    }
 }