From 9b22766defaa5dab203c3bb5f7920a38d780f532 Mon Sep 17 00:00:00 2001
From: jbranchaud <jbranchaud@gmail.com>
Date: Fri, 6 Feb 2015 22:09:06 -0600
Subject: [PATCH] Update summing-collections with a link to my source.

---
 ruby/summing-collections.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ruby/summing-collections.md b/ruby/summing-collections.md
index 42d9c88..34d5faf 100644
--- a/ruby/summing-collections.md
+++ b/ruby/summing-collections.md
@@ -30,3 +30,5 @@ that is needed is
 my_hash.values.inject(:+)
 => 8
 ```
+
+[source](http://stackoverflow.com/questions/1538789/how-to-sum-array-of-numbers-in-ruby)