From f53f1e4a5247d2d14f04a8e632fdfccc097cf598 Mon Sep 17 00:00:00 2001
From: Hendra Susanto <benhanks040888@gmail.com>
Date: Wed, 13 Dec 2017 16:37:41 +0700
Subject: [PATCH] Check for array length in tail function to return the correct
 value for single-value arrays.

---
 README.md                | 3 ++-
 snippets/tail-of-list.md | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 7b4bb82ee..6ea3b089c 100644
--- a/README.md
+++ b/README.md
@@ -503,8 +503,9 @@ Use array destructuring to swap values between two variables.
 Return `arr.slice(1)`.
 
 ```js
-const tail = arr => arr.slice(1);
+const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
 // tail([1,2,3]) -> [2,3]
+// tail([1]) -> [1]
 ```
 
 ### Unique values of array
diff --git a/snippets/tail-of-list.md b/snippets/tail-of-list.md
index 9a9513262..cecca8e8e 100644
--- a/snippets/tail-of-list.md
+++ b/snippets/tail-of-list.md
@@ -3,6 +3,7 @@
 Return `arr.slice(1)`.
 
 ```js
-const tail = arr => arr.slice(1);
+const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
 // tail([1,2,3]) -> [2,3]
+// tail([1]) -> [1]
 ```