Make App Pie
Training and Instructional Design
Tag: optionals
A Swift Tutorial for Working with Classes Part 3: Abstract classes.
In the first tutorial in this series we introduced classes. In the second we did some more advanced manipulations of classes. In both, we discussed the idea of inheritance, which has one final possibility: a class whose only purpose is to define other classes….
The Swift Swift Tutorial: Ten Points for Using Optionals.
In the first month and a half of using Swift, I could argue the optional value is the most difficult new concept. It isn’t hard, just something different to wrap one’s head around. That Apple’s documentation peppers information about optionals in two different e-books…
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