Done all excercises

[belschan]

The only thing that I find difficult to explain to my students are the didSet, willSet of a computed properties, and the fact that oldValue and newVale are already available when we use this type of properties.

[mhanlon]

The only thing that I find difficult to explain to my students are the didSet, willSet of a computed properties, and the fact that oldValue and newVale are already available when we use this type of properties.

Those are a little bit "magical", those properties. For those I typically use a playground to show off how they work and when we might use them... But we can go over that, for sure.