Two class instances reference each other and are not deallocated after use. *Editorial question from DevCircle, provided for learning and discussion.*

I want to validate an optional early and use its value throughout the rest of the function. *Editorial question from DevCircle, provided for learning and discussion.*

When should a local variable be a constant, and can a constant class instance still change? *Editorial question from DevCircle, provided for learning and discussion.*

How does assigning an instance to another variable affect later changes? *Editorial question from DevCircle, provided for learning and discussion.*

A value may be missing. How can the type represent that explicitly? *Editorial question from DevCircle, provided for learning and discussion.*