A list is a monad
The term “monad” is often invoked when describing patterns in functional programming. Yet explanations typically swing between high-level metaphors and deep mathematical abstractions. Each approach offers part of the picture, intuition without precision, or rigor without intuition but seldom both. Monads can be idealized as a container (albeit is a flawed metaphor) or context holding a value (or multiple values, or no value), but in some cases we will get into later on it’s better to think of i