From 26ee327775f7e3087179012d41bc519900af8167 Mon Sep 17 00:00:00 2001
From: Raine Virta <raine.virta@gmail.com>
Date: Sun, 20 Sep 2015 17:43:13 +0300
Subject: [PATCH] add an example of impurity

---
 readme.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/readme.md b/readme.md
index ac2451f..116e0e0 100644
--- a/readme.md
+++ b/readme.md
@@ -86,6 +86,17 @@ greet.toUpperCase(); // YO;
 
 greet // yo;
 ```
+
+As opposed to:
+
+```js
+let numbers = [1, 2, 3];
+
+numbers.splice(0); // [1, 2, 3]
+
+numbers // []
+```
+
 ---
 
 ## Side effects