Branches - Farah | Created program to convert binary number to decimal

lib/binary_to_decimal.rb

@@ -1,9 +1,19 @@
+# Author: Farah Davoodi (Branches)
+
 # A method named `binary_to_decimal` that receives as input an array of size 8.
 # The array is randomly filled with 0’s and 1’s.
 # The most significant bit is at index 0.
 # The least significant bit is at index 7.
 # 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
+  total = 0
+  i = binary_array.length
+
+  binary_array.each do |digit|
+    total += digit*(2**(i-1))
+    i -= 1
+  end
+
+  return total
 end

test/binary_to_decimal_test.rb

@@ -2,6 +2,8 @@
 require 'minitest/reporters'
 require_relative '../lib/binary_to_decimal'
 
+Minitest::Reporters.use!
+
 describe "binary to decimal" do
   it "From 10011001 to 153" do
     binary_array = [1, 0, 0, 1, 1, 0, 0, 1]