From 7c6d9ae21db4f6342db6f30c8e6a56cbeebc971e Mon Sep 17 00:00:00 2001
From: Dmitriy Pleshevskiy <dmitriy@ideascup.me>
Date: Fri, 29 Oct 2021 11:12:45 +0300
Subject: [PATCH] refac(rust): use hashmap entry for in-place manipulation

---
 rust/tests/2_counting_duplicates.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/tests/2_counting_duplicates.rs b/rust/tests/2_counting_duplicates.rs
index 7dfa766..c36637e 100644
--- a/rust/tests/2_counting_duplicates.rs
+++ b/rust/tests/2_counting_duplicates.rs
@@ -4,7 +4,7 @@ fn count_duplicates(text: &str) -> u32 {
     text.to_lowercase()
         .chars()
         .fold(HashMap::<char, u32>::new(), |mut hm, c| {
-            hm.insert(c, hm.get(&c).copied().unwrap_or_default() + 1);
+            (*hm.entry(c).or_default()) += 1;
             hm
         })
         .values()