From 19d402ec8f827c81eab40785238d3c02616a9332 Mon Sep 17 00:00:00 2001
From: George Thomas <georgefsthomas@gmail.com>
Date: Tue, 13 Jan 2026 14:16:43 +0000
Subject: [PATCH] Refactor to use `filter_map`

---
 rust/puzzles/day7.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/rust/puzzles/day7.rs b/rust/puzzles/day7.rs
index a8a77a8..120f231 100644
--- a/rust/puzzles/day7.rs
+++ b/rust/puzzles/day7.rs
@@ -31,8 +31,7 @@ pub const PUZZLE: Puzzle<(usize, Vec<HashSet<usize>>), 2> = Puzzle {
                             .map(|row| {
                                 row.into_iter()
                                     .enumerate()
-                                    .filter(|(_, b)| *b)
-                                    .map(|(i, _)| i)
+                                    .filter_map(|(i, b)| if b { Some(i) } else { None })
                                     .collect()
                             })
                             .collect()