Advantages of Monads
Explore the advantages of monads in functional programming with TypeScript. Understand how monads manage effects while preserving purity, enhance type safety by making function behavior explicit, support total functions, and improve function composition. This lesson helps you apply monads like IO, Option, Either, and Task to write more predictable and safer code.
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Combining effects and purity
Monads exist to handle effects. As discussed earlier, functional programming likes purity. However, effects such as writing to a database or calling some API ruin this purity. This is because the call might work one moment and fail the next, making our results unpredictable. This is where monads are helpful. Because they act as containers, they can store effective behavior. For example, we have monads just for storing effects, typically called IO monads.
Furthermore, with map, we can create functions that further transform the value saved in our container. Here comes the important thing, at least from a functional programming perspective. That is, the IO monad doesn’t create an effect until it’s called. This ...