Book Image

Mastering Swift 2

By : Jon Hoffman
Book Image

Mastering Swift 2

By: Jon Hoffman

Overview of this book

<p><span id="description" class="sugar_field">At their Worldwide Developer’s conference (WWDC) in 2015, Apple announced Swift 2, a major update to the innovative programming language they first unveiled to the world the year before. Swift 2 features exciting enhancements to the original iteration of Swift, acting, as Apple put it themselves as “a successor to the C and Objective-C languages.” – This book demonstrates how to get the most from these new features, and gives you the skills and knowledge you need to develop dynamic iOS and OS X applications.<br /> </span></p> <p><span id="description" class="sugar_field">Learn how to harness the newest features of Swift 2 todevelop advanced applications on a wide range of platforms with this cutting-edge development guide. Exploring and demonstrating how to tackle advanced topics such as Objective-C interoperability, ARC, closures, and concurrency, you’ll develop your Swift expertise and become even more fluent in this vital and innovative language. With examples that demonstrate how to put the concepts into practice, and design patterns and best practices, you’ll be writing better iOS and OSX applications in with a new level of sophistication and control.</span></p>
Table of Contents (24 chapters)
Mastering Swift 2
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
1
Taking the First Steps with Swift
2
Learning about Variables, Constants, Strings, and Operators
Index

Tuples


Tuples group multiple values into a single compound value. Unlike arrays and dictionaries, the values in a tuple do not have to be of the same type. The following example shows how to define a tuple:

var team = ("Boston", "Red Sox", 97, 65, 59.9)

In the preceding example, we created an unnamed tuple that contains two strings, two integers, and one double. We can decompose the values from this tuple into a set of variables, as shown in the following example:

var team = ("Boston", "Red Sox", 97, 65, 59.9)
var (city, name, wins, loses, percent) = team

In the preceding code, the city variable will contain Boston, the name variable will contain Red Sox, the wins variable will contain 97, the loses variable will contain 65, and, finally, the percent variable will contain 0.599.

We could also retrieve the values from a tuple by specifying the location of the value. The following example shows how we would retrieve the values by their location:

var team = ("Boston", "Red Sox", 97, 65, 59.9)
var...