October 2017
Intermediate to advanced
210 pages
5h 32m
English
Content preview from Swift 4 Protocol-Oriented Programming - Third Edition
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Issues with the object-oriented design
Two of the issues that we saw with the object-oriented design were directly related to each other, and are the result of Swift being a single-inheritance language. Remember a single-inheritance language is a language that limits a class to having not more than one super-class.
An object-oriented design with a single-inheritance language, such as Swift, can lead to bloated superclasses because we may need to include functionality that is needed by only a few of the subclasses. This leads to the second issue related to Swift being a single-inheritance language, which is the inheritance of functionality that a type does not need.
In our design, we had to include the functionality for all three terrain types ...
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