From a90645d475bee11150f1ffa1fb53a1e04533a64b Mon Sep 17 00:00:00 2001
From: William Casarin <jb55@jb55.com>
Date: Fri, 6 Dec 2024 09:43:09 -0800
Subject: [PATCH] simplify `prev` function

Thanks chatgpt, I thought this was more verbose than it could have been.

Changelog-None:
Signed-off-by: William Casarin <jb55@jb55.com>
---
 src/ui/column/header.rs | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/src/ui/column/header.rs b/src/ui/column/header.rs
index c1cf742..e8442a9 100644
--- a/src/ui/column/header.rs
+++ b/src/ui/column/header.rs
@@ -240,13 +240,7 @@ impl<'a> NavTitle<'a> {
 }
 
 fn prev<R>(xs: &[R]) -> Option<&R> {
-    let len = xs.len() as i32;
-    let ind = len - 2;
-    if ind < 0 {
-        None
-    } else {
-        Some(&xs[ind as usize])
-    }
+    xs.get(xs.len().checked_sub(2)?)
 }
 
 fn chevron(