Book Image

Mastering Swift 3 - Linux

By : Jon Hoffman
Book Image

Mastering Swift 3 - Linux

By: Jon Hoffman

Overview of this book

Swift is a modern, fast, and safe programming language created by Apple. Writing Swift is interactive and fun, the syntax is concise yet expressive, and the code runs lightning-fast. Swift’s move to open source has been embraced with open arms and has seen increased adoption in the Linux platform. Our book will introduce you to the Swift language, further delving into all the key concepts you need to create applications for desktop, server, and embedded Linux platforms. We will teach you the best practices to design an application with Swift 3 via design patterns and Protocol-Oriented Programming. Further on, you will learn how to catch and respond to errors within your application. When you have gained a strong knowledge of using Swift in Linux, we’ll show you how to build IoT and robotic projects using Swift on single board computers. By the end of the book, you will have a solid understanding of the Swift Language with Linux and will be able to create your own applications with ease.
Table of Contents (24 chapters)
Mastering Swift 3 - Linux
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
2
Learning About Variables, Constants, Strings, and Operators

Linux man pages


In this chapter, we have made several reference to man pages. Man pages, which is short for manual pages, are how software is documented on Unix and Unix-like systems. You can find a wealth of information about applications, system calls, libraries, and even various abstract concepts. Understanding how to use man pages is an important concept for any Linux developer; therefore, let's look at how to use them by looking at the man page for the pcap_findalldevs() function. We will need to open a terminal prompt and use the following command:

man pcap_findalldevs

Once you run this command, you should see something similar to the following screenshot:

To scroll through the page, you will use the up and down arrow keys, and to exit the page, simply press the q key. If you need help, press the h key. There are a number of other commands, but that will be enough to get you started. A man page may contain several sections, but almost all of them start with the NAME, SYNOPSIS...