Learning Swift 2 Programming, 2nd Edition by Jacob Schatz

By Jacob Schatz

Studying speedy 2 Programming is a fast paced, hands-on creation to writing production-quality iOS and OS X apps with Apple's programming language. Written for builders with adventure in any smooth language, this publication explains speedy easily and obviously, utilizing suitable examples that resolve practical difficulties. writer Jacob Schatz's well known YouTube video tutorials have already helped hundreds of thousands of Apple builders start with fast. Now, he is helping you are taking complete good thing about Swift's complicated layout, notable functionality, and streamlined improvement suggestions. step-by-step, you will circulation from uncomplicated syntax via complicated gains similar to closures and generics–discovering beneficial tips and tips alongside the best way. After you might have mastered Swift's development blocks and realized approximately its key concepts, an entire element of case reports walks you thru construction whole apps from scratch.

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Additional resources for Learning Swift 2 Programming, 2nd Edition

Example text

This makes it easy to pass parameters around to different contexts. ” Closures and functions go hand in hand. You don’t necessarily have to know how it works; you just know that pressing the button will make it work. You just know that when you call it, it will work. After you’ve written jump(), you can call it to have your character jump. You will find that although the structure of functions is different, there are parts that make it compatible with Objective-C. You use () to house parameters when you need them; for now, you can leave these parentheses empty.

The element you append will always become the last element. You start with an array of two elements. You insert an element at index 1. Then you just remove the same item you added at index 1. The second card does stay in the second position. You can create and prepopulate an array by using the extra parameters extra: and repeatedValue:. Notice that it does so without making a nested for loop. This technique is used in other languages as well. You can write a dictionary in verbose form or shorthand.

The possibilities are endless. It also has optionals, which are Swift’s own invention. Chapter 2, “Collecting Your Data: Arrays and Dictionaries,” covers arrays and dictionaries in detail. You’ll see how Swift’s strong typing and optionals come into play. In addition, you’ll have Swift’s native arrays and dictionaries available. This chapter describes arrays and dictionaries and the different tools available in each. You will learn when to use NSArrays and when to use Swift’s own arrays. We will learn more about that through this chapter.

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