From 88fc015288f6674eed785d1a0f22d36b0829dcc7 Mon Sep 17 00:00:00 2001
From: Nil Lin <nil@lin.am>
Date: Fri, 24 Apr 2020 13:48:20 +0800
Subject: [PATCH] fix: return traverse of Right in appendix

---
 appendix_b.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/appendix_b.md b/appendix_b.md
index b85bf86..5066f39 100644
--- a/appendix_b.md
+++ b/appendix_b.md
@@ -149,7 +149,7 @@ class Right extends Either {
   }
 
   traverse(of, fn) {
-    fn(this.$value).map(Either.of);
+    return fn(this.$value).map(Either.of);
   }
 }
 ```
-- 
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