Travis build: 1476

README.md

@@ -1723,8 +1723,8 @@ const join = (arr, separator = ',', end = separator) =>
       i === arr.length - 2
         ? acc + val + end
         : i === arr.length - 1
-        ? acc + val
-        : acc + val + separator,
+          ? acc + val
+          : acc + val + separator,
     ''
   );
 ```
@@ -4272,10 +4272,10 @@ const getMeridiemSuffixOfInteger = num =>
   num === 0 || num === 24
     ? 12 + 'am'
     : num === 12
-    ? 12 + 'pm'
-    : num < 12
-    ? (num % 12) + 'am'
-    : (num % 12) + 'pm';
+      ? 12 + 'pm'
+      : num < 12
+        ? (num % 12) + 'am'
+        : (num % 12) + 'pm';
 ```
 
 <details>
@@ -5487,11 +5487,11 @@ Throws an exception if `n` is a negative number.
 const factorial = n =>
   n < 0
     ? (() => {
-        throw new TypeError('Negative numbers are not allowed!');
-      })()
+      throw new TypeError('Negative numbers are not allowed!');
+    })()
     : n <= 1
-    ? 1
-    : n * factorial(n - 1);
+      ? 1
+      : n * factorial(n - 1);
 ```
 
 <details>
@@ -6688,11 +6688,13 @@ jQuery(element).on('click', view.click); // Logs 'clicked docs' when clicked.
 Creates a deep clone of an object.
 
 Use recursion.
+Check if the passed object is `null` and, if so, return `null`.
 Use `Object.assign()` and an empty object (`{}`) to create a shallow clone of the original.
 Use `Object.keys()` and `Array.prototype.forEach()` to determine which key-value pairs need to be deep cloned.
 
 ```js
 const deepClone = obj => {
+  if (obj === null) return null;
   let clone = Object.assign({}, obj);
   Object.keys(clone).forEach(
     key => (clone[key] = typeof obj[key] === 'object' ? deepClone(obj[key]) : obj[key])
@@ -6700,8 +6702,8 @@ const deepClone = obj => {
   return Array.isArray(obj) && obj.length
     ? (clone.length = obj.length) && Array.from(clone)
     : Array.isArray(obj)
-    ? Array.from(obj)
-    : clone;
+      ? Array.from(obj)
+      : clone;
 };
 ```
 
@@ -6789,13 +6791,13 @@ const deepMapKeys = (obj, f) =>
   Array.isArray(obj)
     ? obj.map(val => deepMapKeys(val, f))
     : typeof obj === 'object'
-    ? Object.keys(obj).reduce((acc, current) => {
+      ? Object.keys(obj).reduce((acc, current) => {
         const val = obj[current];
         acc[f(current)] =
           val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);
         return acc;
       }, {})
-    : obj;
+      : obj;
 ```
 
 <details>
@@ -6866,9 +6868,9 @@ const dig = (obj, target) =>
   target in obj
     ? obj[target]
     : Object.values(obj).reduce((acc, val) => {
-        if (acc !== undefined) return acc;
-        if (typeof val === 'object') return dig(val, target);
-      }, undefined);
+      if (acc !== undefined) return acc;
+      if (typeof val === 'object') return dig(val, target);
+    }, undefined);
 ```
 
 <details>