From 4691a38d21955b644e59a116cfd07108169e3edf Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Fri, 21 Aug 2015 13:56:59 -0700
Subject: [PATCH] Add `baseKeys`.

---
 lodash.js | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/lodash.js b/lodash.js
index 103f7affc..c2d076906 100644
--- a/lodash.js
+++ b/lodash.js
@@ -2167,6 +2167,19 @@
       return property(func);
     }
 
+    /**
+     * The base implementation of `_.keys` which doesn't skip the constructor
+     * property of prototypes or treat sparse arrays as dense.
+     *
+     * @private
+     * @type Function
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of property names.
+     */
+    function baseKeys(object) {
+      return nativeKeys(Object(object));
+    }
+
     /**
      * The base implementation of `_.keysIn` which doesn't skip the constructor
      * property of prototypes or treat sparse arrays as dense.
@@ -9117,11 +9130,9 @@
      * // => ['0', '1']
      */
     function keys(object) {
-      object = Object(object);
-
       var isProto = isPrototype(object);
       if (!(isProto || isArrayLike(object))) {
-        return nativeKeys(object);
+        return baseKeys(object);
       }
       var result = initKeys(object),
           length = result.length,