Maybe
- Beginner crash course: Functor
- Featured function: mapMaybe
- Featured function: toIntegralSized
- Applicative, lesson 1: Mapping a Maybe function
- Functor and Bifunctor, lesson 4: Breaking the laws!
- Functor and Bifunctor, lesson 1: Introduction to mapping
- Operators in JavaScript and Haskell
- The Validation Course
- Validation, lesson 2: Case expressions practice
- Validation, lesson 3: Validation functions
- Validation, lesson 4: The Maybe Monad
- Validation, lesson 5: Refactoring with Either