Level 03
- Swift programming revision for Level 3
- Solution: Swift programming revision for Level 3
- Map, filter, and reduce
- Other functions with closures
- Introduction to object-oriented programming
- Methods: instance, static, and mutating
- Protocols
- OOP Challenge
- Introduction to GRDB.swift
- Reading and writing with GRDB
- Testing
- Cheat sheet
- Level 3 programming assessment 2026