Luxi Lindsey - Binary and Decimal - Octos

lib/binary_to_decimal.rb

@@ -4,6 +4,41 @@
 # 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 = Array.new(8) { rand(0..1)}
+
+# this method will take in the array of 8 bits randomly created
+# and output the decimal value.
+# def binary_to_decimal(binary_array)
+#   # raise NotImplementedError
+#   i = 0
+#   expected_decimal = []
+#   binary_array.reverse.each do |index|
+#     expected_decimal << index * 2 ** i
+#     i += 1
+#   end
+#   return expected_decimal.inject(:+)
+# end
+
+
+# a little unsure how to update the method to not use Ruby functions.
+# Shruti mentioned that times loop is okay. So I updated the above
+# method to be a times loop insted.
 def binary_to_decimal(binary_array)
-  raise NotImplementedError
+  # raise NotImplementedError
+  i = 0
+  expected_decimal = []
+  new_binary_array = Array.new(binary_array.reverse)
+
+  8.times do |index|
+    expected_decimal << new_binary_array[index] * 2 ** i
+    i += 1
+  end
+  return expected_decimal.inject(:+)
 end
+
+
+# # UI to test the above code
+# expected_decimal = binary_to_decimal([1, 0, 0, 0, 0, 0, 0, 0])
+# puts expected_decimal