From efce25dc536fbf57d12ae839d915fd5b6239cd9b Mon Sep 17 00:00:00 2001
From: Hannah Cameron <hannahiscoding@gmail.com>
Date: Sun, 25 Feb 2018 21:57:21 -0800
Subject: [PATCH] wrote method that passed all tests the first time around

---
 lib/binary_to_decimal.rb | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/binary_to_decimal.rb b/lib/binary_to_decimal.rb
index 439e8c6..52fffc1 100644
--- a/lib/binary_to_decimal.rb
+++ b/lib/binary_to_decimal.rb
@@ -5,5 +5,11 @@
 # Calculate  and return the decimal value for this binary number using
 # the algorithm you devised in class.
 def binary_to_decimal(binary_array)
-  raise NotImplementedError
+  i = 0
+  decimal = 0
+  binary_array.reverse.each do |num|
+    decimal += num * (2**i)
+    i += 1
+  end
+  return decimal
 end