Download The Well-Grounded Rubyist by David A. Black PDF

By David A. Black

The Well-Grounded Rubyist takes you from beginner to trained practitioner. It's a fantastically written educational that starts off with the elemental steps to get your first Ruby application up and operating and is going directly to discover refined themes like callable items, mirrored image, and threading. no matter if the subject is easy or difficult, the book's easy-to-follow examples and reasons provides you with speedy self assurance as you construct your Ruby programming abilities.

The Well-Grounded Rubyist is a completely revised and up-to-date variation of the best-selling Ruby for Rails. during this new ebook, specialist writer David A. Black strikes past Rails and provides a broader view of Ruby. It covers Ruby 1.9, and retains an identical sharp concentration and transparent writing that made Ruby for Rails stand out.

beginning with the fundamentals, The Well-Grounded Rubyist explains Ruby items and their interactions from the floor up. within the center chapters, the publication turns to an exam of Ruby's integrated, center periods, displaying the reader how you can manage strings, numbers, arrays, levels, hashes, units, and extra. general expressions get cognizance, as do dossier and different I/O operations.

alongside the way in which, the reader is brought to various instruments integrated within the normal Ruby distribution--tools just like the job supervisor Rake and the interactive Ruby console-based interpreter Irb--that facilitate Ruby improvement and make it an built-in and delightful adventure.

The e-book encompasses complex subject matters, just like the layout of Ruby's classification and module method, and using Ruby threads, taking even the hot Rubyist deep into the language and giving each reader the rules essential to use, discover, and luxuriate in this surprisingly well known and flexible language.

It's no ask yourself one reader commented: "The technical intensity is simply correct not to distract rookies, but targeted sufficient for extra complex readers."

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Self is a role that different objects play, depending on the execution context. Method calls that don’t specify a calling object are called on self. Put comments in code files # A comment x = 1 # A comment Comments are ignored by the interpreter. " end extra information about what it’s printing. A few fundamental aspects of Ruby and Ruby syntax are too involved for summary in a table. You need to be able to recognize a small handful of different Ruby identifiers and, above all, you need a sense of what an object is in Ruby and what a method call looks like.

Ruby keeps track of which files you’ve required and doesn’t duplicate the effort. require is a little more abstract than load. Strictly speaking, you don’t require a file; you require a feature. And typically, you do so without even specifying the extension on the filename. rb, you get the same result as before, even though you haven’t supplied the full name of the file you want loaded. bundle. You can also feed a fully qualified path to require, as you can to load, and it will pull in the file/feature.

You can even modify existing Ruby classes; if you don’t like the behavior of strings or arrays, you can change it. It’s almost always a bad idea to do so, but Ruby does allow it. ) Although every Ruby object is an instance of a class, the concept of class is less important than the concept of object. That’s because objects can change, acquiring methods and behaviors that were not defined in their class. The class is responsible for launching the object; but the object, thereafter, has a life of its own.

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