From 520f7c68128bfac7ef827aa70eaa00902a1b4af2 Mon Sep 17 00:00:00 2001
From: jdalton <john.david.dalton@gmail.com>
Date: Mon, 13 Apr 2015 09:30:01 -0700
Subject: [PATCH] Ensure `index` in `baseSortByOrder` is an integer.

---
 lodash.src.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/lodash.src.js b/lodash.src.js
index 149b8c854..80ddc321e 100644
--- a/lodash.src.js
+++ b/lodash.src.js
@@ -2846,12 +2846,14 @@
      * @returns {Array} Returns the new sorted array.
      */
     function baseSortByOrder(collection, iteratees, orders) {
-      var callback = getCallback();
+      var callback = getCallback(),
+          index = -1;
+
       iteratees = arrayMap(iteratees, function(iteratee) { return callback(iteratee); });
 
-      var result = baseMap(collection, function(value, index) {
+      var result = baseMap(collection, function(value) {
         var criteria = arrayMap(iteratees, function(iteratee) { return iteratee(value); });
-        return { 'criteria': criteria, 'index': index, 'value': value };
+        return { 'criteria': criteria, 'index': ++index, 'value': value };
       });
 
       return baseSortBy(result, function(object, other) {