Algebraic Data Types
summary
Claims that algebraic data types are just product type = multiply and sum type = add and shows concrete JavaScript counts: a product example yields 12 combinations (3 × 2 × 2) and a sum example yields 7 options (3 + 2 + 2). Demonstrates a real bug class—mixing string and undefined—resolved by explicitly handling the string | undefined cases. Uses plain code-level reasoning and counting rather than abstract theory, so usefulness is demonstrated with numbers and a fix that actually works.
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chapters (7)
- 0:00Start
- 1:06Algebraic Data Types
- 1:21Primitive types
- 1:36Fruit Salad - a Product type
- 2:21Persona Product type
- 2:36Fruit Snack -a Sum type
- 3:52Matching Types
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