Update binary_to_decimal.rb

lib/binary_to_decimal.rb

@@ -4,6 +4,19 @@
 # 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.
+binary_array = []
+
+8.times {binary_array << rand(0..1)}
+
 def binary_to_decimal(binary_array)
-  raise NotImplementedError
+  sum = 0
+  binary_array.each_with_index do |binary, index|
+    exponent = binary_array.length - 1 - index
+    value = binary * 2 ** exponent
+    sum += value
+  end
+  # raise NotImplementedError
+  return sum
 end
+
+print binary_to_decimal(binary_array)