API Design Guide
Apple has released API Design Guidelines for Swift. This defines how APIs should be designed and is different from a language style guide. A language style guide defines how code should be written for a particular language; an API design guide defines how APIs should be designed. If you are creating an API that will be used by other Swift developers, you should become familiar with Apple's API Design Guidelines, which can be found here: https://swift.org/documentation/api-design-guidelines/.
Your style guide
The style guide that we define in this book is just a guide. It reflects the author's opinion on how Swift code should be written and is meant to be a good starting point for creating your own style guide. If you really like this guide and adopt it as it is, great. If there are parts that you do not agree with and you change them within your guide, that is great as well.
The appropriate style for you and your team is the one that you and...
