Yes, I know that. There's a long and interesting history on the "round hole, square peg" problem of I/O, side effects and functional programming. My sole inten

Yes, I know that. There's a long and interesting history on the "round hole, square peg" problem of I/O, side effects and functional programming. My sole intent was to emphasize, using a practical example, how neat and elegant monads can be at best.