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In this chapter we’re going to look at some advanced Ruby techniques that have not been covered in prior chapters. This chapter is the last instructional chapter in the second part of the book, and although we’ll be covering useful libraries, frameworks, and Ruby-related technologies in Part 3, this chapter rounds off the mandatory knowledge that any proficient Ruby programmer should have. This means that although this chapter will jump between several different topics, each is essential to becoming a professional Ruby developer.

In this chapter we’re going to step back from focusing on individual facets of Ruby and instead develop an entire program using the knowledge we’ve gained so far. We’re going to focus on the structural concerns of application development and look at how a flexible program structure can benefit you and other developers in the long run.

In this chapter we’re going to look at the framework, a cutting-edge Web application development framework. We’ll walk through developing a basic Rails application and getting it running with a database, before looking at a few more-advanced Web development topics.

In this chapter we’re going to look at how to use Ruby with the Internet and with the various services available on the Internet, from the Web to e-mail and file transfers.

In this chapter we’re going to look at how to use Ruby to perform network-related operations, how to create servers and network services, and how to create persistent processes that can respond to queries over a network.

This chapter is a basic reference to a collection of useful Ruby libraries and RubyGems that you might want to use in your programs. We’re going to look at libraries covering a vast array of functionality, from networking and Internet access to file parsing and compression. The libraries in this chapter are in alphabetical order, and each library starts on a new page with the name as the page header for easy browsing. Below each library’s title, several subsections follow: