pop-count

elixir/pop-count/lib/pop_count.ex

@@ -0,0 +1,51 @@
+defmodule PopCount do
+  @doc """
+  Given the number, count the number of eggs.
+  """
+  @spec egg_count(number :: integer()) :: non_neg_integer()
+  def egg_count(number) do
+    for(<<bit::1 <- :binary.encode_unsigned(number)>>, do: bit) |> Enum.sum
+  end
+
+  # @spec egg_count(number :: integer()) :: non_neg_integer()
+  # def egg_count(number) do
+  #   result =
+  #     number
+  #     |> Integer.digits(2)
+  #     |> Enum.reduce(%{binary: "", count: 0, coop: "|", length: 0}, &egg_counter/2)
+
+  #   """
+  #   Chicken Coop:
+  #   #{String.duplicate(" _", result.length)}
+  #   #{result.coop}
+
+  #   Resulting Binary:
+  #   #{result.binary}
+
+  #   Decimal number on the display:
+  #   #{number}
+
+  #   Actual eggs in the coop:
+  #   #{result.count}
+  #   """
+  #   |> IO.puts()
+
+
+  #   result.count
+  # end
+
+  # defp egg_counter(element, %{binary: binary, count: count, coop: coop, length: length} = _acc) do
+  #   char =
+  #     case element do
+  #       0 -> " "
+  #       1 -> "E"
+  #     end
+
+  #   %{
+  #     coop: coop <> char <> "|",
+  #     count: count + element,
+  #     length: length + 1,
+  #     binary: binary <> "#{element}"
+  #   }
+  # end
+end