Type Composition
Composition (π solution)
π¨βπΌ You've built a type hierarchy from simple building blocks!
π¦ This composition approach has benefits:
- Consistency - All IDs have the same type
- Flexibility - Change
IDfromstringtonumberin one place - Documentation - Types like
Emailcommunicate intent
In the next exercise on intersection types, you'll learn an even cleaner way to
compose types without repeating fields.