Arrow types

Arrow types in programming (like Haskell or TypeScript) are a way to describe functions that process data in a structured way, similar to how a machine part might take in an input, perform a task, and produce an output. Think of arrows as customizable pipelines or workflows that can handle complex data transformations, side effects, or interaction sequences. They help programmers organize and connect functions more flexibly, making code easier to read, maintain, and reason about, especially when dealing with complex data flows or operations that involve multiple steps or effects.