notedeck

commit a90645d475bee11150f1ffa1fb53a1e04533a64b
parent 69e93b0ebfef424d9ad5ee91faadb59ef06c2585
Author: William Casarin <jb55@jb55.com>
Date:   Fri,  6 Dec 2024 09:43:09 -0800

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>

Diffstat:
M
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
@@ -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(