From 60023a23dfa09d2c6699a9dcbc278fa3d9c76769 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Sat, 27 Aug 2016 10:43:51 -0700
Subject: [PATCH] Exit `concat` early if no arguments are provided.

---
 lodash.js | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/lodash.js b/lodash.js
index 8d8c6d1f7..626e59df2 100644
--- a/lodash.js
+++ b/lodash.js
@@ -6588,17 +6588,18 @@
      * // => [1]
      */
     function concat() {
-      var length = arguments.length,
-          args = Array(length ? length - 1 : 0),
+      var length = arguments.length;
+      if (!length) {
+        return [];
+      }
+      var args = Array(length - 1),
           array = arguments[0],
           index = length;
 
       while (index--) {
         args[index - 1] = arguments[index];
       }
-      return length
-        ? arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1))
-        : [];
+      return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
     }
 
     /**