From bbbf5cfc9dc46f58776954a18c0f60e342410a17 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pablo=20Jo=C3=A1n=20Iglesias?= <iglesias.pablo10@gmail.com>
Date: Tue, 26 Jul 2016 02:14:57 -0400
Subject: [PATCH] For each body should be wrapped in an if statement (#14)

unit test to go with commit
---
 src/Phpml/Math/Product.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Phpml/Math/Product.php b/src/Phpml/Math/Product.php
index 70accb9..678dd71 100644
--- a/src/Phpml/Math/Product.php
+++ b/src/Phpml/Math/Product.php
@@ -16,7 +16,9 @@ class Product
     {
         $product = 0;
         foreach ($a as $index => $value) {
-            $product += $value * $b[$index];
+            if (is_numeric($value) && is_numeric($b[$index])) {
+                $product += $value * $b[$index];
+            }
         }
 
         return $product;