HXT Arrow Lesson 0: ArrowsWhat Are Arrows? Many Haskellers begin by asking "what are arrows?" I won't answer this question. It distracts from the theory and practice. First Arrow Program Take a deep breath. Now we plunge right into our first program using arrows. Don't panic! It is short, and I will explain what it does and why. So, take a deep breath again, and here we go! You can also download it as lesson-0.hs. import T
