From 42e01cee62409c2fb963e5efdca65bcb257addf4 Mon Sep 17 00:00:00 2001
From: Hector Remedios <hectoremedio90@gmail.com>
Date: Thu, 23 Jul 2020 01:38:41 -0500
Subject: [PATCH] Function to calculate the difference between two chains

---
 src/index.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/index.js b/src/index.js
index 243d154..068873d 100644
--- a/src/index.js
+++ b/src/index.js
@@ -6,6 +6,14 @@
 
 const hammingDistance = (a, b) => {
     
+    if (a.length === b.length) {
+      const aArray = a.split('');
+      const bArray = b.split('');
+      return bArray.filter((letter, index) => aArray[index] !== letter).length
+    } else {
+      throw new Error("You must enter strings with the same length");
+    }
+    
   }
   
   module.exports = hammingDistance;
\ No newline at end of file