👥 Rust Monads §

(not an official identifier, used for simplification)

Types §

• 😶‍🌫️ Rust Options
• 🎭 Rust Results

Shared Functions §

Note: monad / Monad stands for Option or Result

Unwrap §

• monad.unwrap_or(fallback) → returns success value, fallback if it doesn’t exist
• monad.unwrap_or_else(fallback_fn) → returns success value, calls fallback fn / closure if it doesn’t exist
• monad.unwrap() → returns success value, panic if it doesn’t exist
• monad.expect(message) → like .unwrap(), also prints message

Map §

• monad.map(self, f: F) → Maps a Result<T, E> to Result<U, E> by applying a function/closure op to it, fail value untouched
• monad.map_err(self, op: F) → like map(), but for E
• monad.map_or(self, default,f: F) → Maps a Result<T, E> to Result<U, E> by applying a function/closure f to it, or returns default if E exists
• monad.map_or_else(self, default, op: F) → lazy call of map_or, use if passing function call as default

References §

• monad.as_ref() → Converts &Monad<T> to Monad<&T>
• monad.as_mut() → Converts &mut Monad<T> to Monad<&mut T>