From 0ea48f27e2a8b9dbe3c10ea2cffd06a33befc85c Mon Sep 17 00:00:00 2001
From: Deniz Susman <susmandeniz@gmail.com>
Date: Wed, 3 Apr 2019 18:45:07 +0300
Subject: [PATCH] deepEqual throws exception

If deepEqual is invoked with an empty object and null, it throws TypeError.
---
 utilities/javascript/deepEqual.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utilities/javascript/deepEqual.js b/utilities/javascript/deepEqual.js
index ec82255c..d2c9f649 100644
--- a/utilities/javascript/deepEqual.js
+++ b/utilities/javascript/deepEqual.js
@@ -17,7 +17,7 @@ function deepEqual(val1, val2) {
     }
 
     // Object comparison.
-    if (typeof val1 === 'object' && typeof val2 === 'object' && val1 !== null) {
+    if (typeof val1 === 'object' && typeof val2 === 'object' && val1 !== null && val2 !== null) {
         const keys1 = Object.keys(val1), keys2 = Object.keys(val2);
         if (keys1.length !== keys2.length) {
             return false;