From 0a9dd33e584f40b61b267e8e425e4a938f42e6d9 Mon Sep 17 00:00:00 2001
From: Marshall Pierce <575695+marshallpierce@users.noreply.github.com>
Date: Fri, 6 Jan 2023 09:47:42 -0700
Subject: [PATCH] Create an empty rather than pre-allocating

It might give the impression that you can only write to a Vec that has capacity, when in fact Vec's Write impl will grow the storage as needed. While pre-allocating is probably a good efficiency win in many circumstances, I think it's probably worth minimizing the number of concepts in play in this example.
---
 src/traits/read-write.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/traits/read-write.md b/src/traits/read-write.md
index 59303408..c363fc36 100644
--- a/src/traits/read-write.md
+++ b/src/traits/read-write.md
@@ -31,7 +31,7 @@ fn log<W: Write>(writer: &mut W, msg: &str) -> Result<()> {
 }
 
 fn main() -> Result<()> {
-    let mut buffer = Vec::with_capacity(1024);
+    let mut buffer = Vec::new();
     log(&mut buffer, "Hello")?;
     log(&mut buffer, "World")?;
     println!("Logged: {:?}", buffer);