From 2380c0ddb849c61d61db92331cc0255f2c68c02b Mon Sep 17 00:00:00 2001
From: Josh <thepeoplesbourgeois@users.noreply.github.com>
Date: Wed, 27 Sep 2017 12:51:40 -0700
Subject: [PATCH] [guide] Improve severity of warning comment

---
 README.md | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index ffa841039b..f0186becac 100644
--- a/README.md
+++ b/README.md
@@ -381,10 +381,10 @@ Other Style Guides
 
     ```javascript
     // bad
-    const bar = [...foo].map(bar);
+    const baz = [...foo].map(bar);
 
     // good
-    const bar = Array.from(foo, bar);
+    const baz = Array.from(foo, bar);
     ```
 
   <a name="arrays--callback-return"></a><a name="4.5"></a>
@@ -400,18 +400,18 @@ Other Style Guides
     // good
     [1, 2, 3].map(x => x + 1);
 
-    // bad
+    // bad - no returned value means `memo` becomes undefined after the first iteration
     const flat = {};
     [[0, 1], [2, 3], [4, 5]].reduce((memo, item, index) => {
       const flatten = memo.concat(item);
-      flat[index] = flatten;
+      memo[index] = flatten;
     });
 
     // good
     const flat = {};
     [[0, 1], [2, 3], [4, 5]].reduce((memo, item, index) => {
       const flatten = memo.concat(item);
-      flat[index] = flatten;
+      memo[index] = flatten;
       return flatten;
     });