Semret Nicodimos - Edges - Binary to Decimal conversion method

lib/binary_to_decimal.rb

@@ -4,6 +4,29 @@
 # 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.
+
+# first way to do it taking out reverse
+# def binary_to_decimal(binary_array)
+#   decimal = 0
+#   count = 7
+#
+#   binary_array.each do |num|
+#     decimal += (num * (2**count))
+#     count -= 1
+#   end
+#
+#   return decimal
+# end
+
+# Using times loop and count
+
 def binary_to_decimal(binary_array)
-  raise NotImplementedError
+  decimal = 0
+  count = binary_array.length
+
+  count.times do |index|
+    decimal += (binary_array[index] * (2**(count-1-index)))
+  end
+
+  return decimal
 end

specs/binary_to_decimal_spec.rb

@@ -1,5 +1,6 @@
 require 'minitest/autorun'
 require 'minitest/reporters'
+require 'minitest/pride'
 require_relative '../lib/binary_to_decimal'
 
 describe "binary to decimal" do