Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "You can add comments to your code, such as a TODO item or just a brief explanation of what something is doing."

A block of code is set as follows:

let arrOfInts:[Int] = []
let arrStrings = [String]()

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Once installed, launch Xcode, and you should see the following Welcome to Xcode screen."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.