From b34cc4c1b6655af3e40450edfb954b6e27aceda4 Mon Sep 17 00:00:00 2001
From: Love Billenius <lovebillenius@disroot.org>
Date: Tue, 7 Jan 2025 15:58:19 +0100
Subject: [PATCH] clarification

---
 src/main.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index de46799..1674290 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -22,6 +22,10 @@ fn filter_currencies(exchange_rate_results: &mut [ExchangeRateResult], currencie
             .keys()
             .filter(|x| !currencies.contains(x))
             .for_each(|key_to_remove| {
+                /* This is safe, since we:
+                 * 1. Already have a mutable reference.
+                 * 2. Don't run the code in paralell
+                 */
                 let rates = unsafe { (*rates_ptr).borrow_mut() };
                 rates.remove_entry(key_to_remove);
             });