Optionals

A Practical Guide For Handling Optionals – Andreas Lüdemann

2020) Swift Tutorial for Beginners: Lesson 13 Optionals

std::optional or sentinel? - by Taras Tsugrii

Optional Class in Java 8. Let's learn how to deal with NPEs using…, by Salitha Chathuranga

Properly Handling Optional Variables in Swift 5, by Lahiru chathuranga

3 mistakes to avoid with Optionals — Swift with Vincent

Optionals - a free Hacking with Swift tutorial

Optional Types in Swift – How to Use and Unwrap Optionals

Optional Competitions

Swift Optionals Explained: How to use them and what are they (iOS for Beginners)

How to Unit Test Optionals in Swift

OPTIONALS 360 Gymnastics

Summary: Optionals – Swift for Complete Beginners

Optionals – Flip For Me Gymnastics

Optionals - a free Hacking with Swift tutorial