From 6a79ada7f2afc668418c8fd15e2db622f3d833af Mon Sep 17 00:00:00 2001
From: mo8it <mo8it@proton.me>
Date: Fri, 21 Jun 2024 15:06:50 +0200
Subject: [PATCH] Add comment to vecs2

---
 solutions/05_vecs/vecs2.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/solutions/05_vecs/vecs2.rs b/solutions/05_vecs/vecs2.rs
index 32c1c0f..87f7625 100644
--- a/solutions/05_vecs/vecs2.rs
+++ b/solutions/05_vecs/vecs2.rs
@@ -16,6 +16,11 @@ fn vec_map_example(input: &[i32]) -> Vec<i32> {
 }
 
 fn vec_map(input: &[i32]) -> Vec<i32> {
+    // We will dive deeper into iterators, but for now, this is all what you
+    // had to do!
+    // Advanced note: This method is more efficient because it automatically
+    // preallocates enough capacity. This can be done manually in `vec_loop`
+    // using `Vec::with_capacity(input.len())` instead of `Vec::new()`.
     input.iter().map(|element| 2 * element).collect()
 }