Monads: A New Insight Into What They Are

Most of our functions historically have just returned some value. And so if anything goes wrong or if we want to do anything extra, we're sort of forced to do it using side effects. In go, every time you call a function, you get this box back and you got to unpack it. Scala has the mechanism built into the four comprehension to automatically unpack that result. If there's a failure, it short circuits to the end. The monad is the box and the associated mechanisms to make the programming with the box easier.