Adzz · June 16, 2019 15:00
diff --git a/zip_blog_post_4.ex b/zip_blog_post_4.ex
 defimpl Zip, for: List do
  def apply(a, b, operation) do
    Enum.zip(a, b)
    |> Enum.map(fn {a, b} -> operation.calculate(a, b) end)
  end
 end

 # Now we can call it like this:
 Zip.apply([1, 2], [3, 4], Add) #=> [4, 6]
	defimpl Zip, for: List do
	def apply(a, b, operation) do
	Enum.zip(a, b)
	\|> Enum.map(fn {a, b} -> operation.calculate(a, b) end)
	end
	end

	# Now we can call it like this:
	Zip.apply([1, 2], [3, 4], Add) #=> [4, 6]