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: "The XCPlayground also helped us with the XCPCaptureValue function."

A block of code is set as follows:

protocol Queue {
    typealias ElementType
    func enqueue(element:ElementType)
    func dequeue() -> ElementType
    var size: Int{
        get
    }
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

override func viewDidLoad() {
    super.viewDidLoad()
    // Perform custom UI setup here
    var geekNib = UINib(nibName: "Geekboard", bundle: nil)
    self.view = geekNib.instantiateWithOwner(self, options: nil)[0] as UIView
    self.label.text = currentBinaryText
    self.nextKeyboardButton = UIButton.buttonWithType(.System) as UIButton

Any command-line input or output is written as follows:

xcode-select -p

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: "When the application appears, click on calculate, without adding any information into the text fields."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.