Branded types and nominal patterns
Comes up in: Coding, Low-level design
This concept is being written. It gets the full five steps — explanation, predict, interview angle, practice with tests, and review cards. Here is exactly what it will cover, so you can study it elsewhere in the meantime.
What it covers
- brands with unique symbols
UserIdvsOrderId- smart constructors with validation
- opaque types for money/units
Words you will know
What you will practise
- prevent mixing currency amounts
Interview questions this answers
- What is a branded type and why would you use one?