Ebook Free Design Patterns in Ruby

Ebook Free Design Patterns in Ruby

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Design Patterns in Ruby

Ebook Free Design Patterns in Ruby

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From the Back Cover

Praise for "Design Patterns in Ruby"""Design Patterns in Ruby" documents smart ways to resolve many problems that Ruby developers commonly encounter. Russ Olsen has done a great job of selecting classic patterns and augmenting these with newer patterns that have special relevance for Ruby. He clearly explains each idea, making a wealth of experience available to Ruby developers for their own daily work."-Steve Metsker, Managing Consultant with Dominion Digital, Inc."This book provides a great demonstration of the key 'Gang of Four' design patterns without resorting to overly technical explanations. Written in a precise, yet almost informal style, this book covers enough ground that even those without prior exposure to design patterns will soon feel confident applying them using Ruby. Olsen has done a great job to make a book about a classically 'dry' subject into such an engaging and even occasionally humorous read."-Peter Cooper"This book renewed my interest in understanding patterns after a decade of good intentions. Russ picked the most useful patterns for Ruby and introduced them in a straightforward and logical manner, going beyond the GoF's patterns. This book has improved my use of Ruby, and encouraged me to blow off the dust covering the GoF book."-Mike Stok""Design Patterns in Ruby" is a great way for programmers from statically typed objectoriented languages to learn how design patterns appear in a more dynamic, flexible language like Ruby."-Rob Sanheim, Ruby Ninja, RelevanceMost design pattern books are based on C++ and Java. But Ruby is different-and the language's unique qualities make design patterns easier to implement and use. In this book, Russ Olsen demonstrates how to combine Ruby's power and elegance with patterns, and write more sophisticated, effective software with far fewer lines of code.After reviewing the history, concepts, and goals of design patterns, Olsen offers a quick tour of the Ruby language-enough to allow any experienced software developer to immediately utilize patterns with Ruby. The book especially calls attention to Ruby features that simplify the use of patterns, including dynamic typing, code closures, and "mixins" for easier code reuse.Fourteen of the classic "Gang of Four" patterns are considered from the Ruby point of view, explaining what problems each pattern solves, discussing whether traditional implementations make sense in the Ruby environment, and introducing Ruby-specific improvements. You'll discover opportunities to implement patterns in just one or two lines of code, instead of the endlessly repeated boilerplate that conventional languages often require."Design Patterns in Ruby" also identifies innovative new patterns that have emerged from the Ruby community. These include ways to create custom objects with metaprogramming, as well as the ambitious Rails-based "Convention Over Configuration" pattern, designed to help integrate entire applications and frameworks.Engaging, practical, and accessible, "Design Patterns in Ruby" will help you build better software while making your Ruby programming experience more rewarding.

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About the Author

Russ Olsen has been building software for more than twenty-five years. He has led projects through several generations of programming technologies, from FORTRAN to C to C++ to Java, and now Ruby. He has been using and teaching Ruby since 2002. Olsen writes the popular technology blog Technology As If People Mattered (http://www.russolsen.com).

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Product details

Hardcover: 384 pages

Publisher: Addison-Wesley Professional; 1 edition (December 20, 2007)

Language: English

ISBN-10: 0321490452

ISBN-13: 978-0321490452

Product Dimensions:

7.1 x 1 x 9.3 inches

Shipping Weight: 1.6 pounds (View shipping rates and policies)

Average Customer Review:

4.5 out of 5 stars

41 customer reviews

Amazon Best Sellers Rank:

#475,169 in Books (See Top 100 in Books)

Great introductory anecdotes. Actually relevant and engaging, unlike most other intros. The writing style is solid. The summary and comparison to non-ruby design pattersn by the Gang of Four are very useful. Sometimes I think the writing could be a bit better, as it can sometimes be hard to digest. I think more comparison and differentiation between patterns would be useful as a separate section, as some design pattersn are very similar, and often times hard to distinguish by isolated, separate explanations alone without explicit comparing.I'd recommend this book to people who have programmed some object oriented application, not brand new beginners to coding. Also, I recommend first reading Sandi Metz's object oriented programming in ruby first, as it familiarizes you with the design problems and solutions... which totally sets you up with the context and understanding that makes this amazing book on design patterns totally sink in better. This book is like gear 3, whereas Sandi's book may be considered gear 2 (gear 1 is just being familiar with ruby language or programming in general). It's much more effective to first reach your previous gear before going into higher gears.

After reading Russ Olsen's Eloquent Ruby years ago, I knew this was a guy who could write. I have recommended that book to numerous people since then, and recently when I was searching for it I found this book. It does not disappoint. If you have read the "gang of four" Design Patterns book you'll recognize most of what Olsen writes about here. But what is amazing and cool is that the book is for rubyists and he demonstrates patterns that are regularly relevant to those of us writing ruby professionally (that includes Rails). And of course there are opportunities to use the beauty of ruby to do in a few lines what I did in many in C++ and Java, so it continues in the vein of instruction I loved so much in Eloquent Ruby. There are even some ruby-specific patterns at the end. I have been writing ruby since 2008 or thereabouts and have written a lot of bad code, and read far more bad code. Read and understand Olsen's books and do the world a favor by seeing ways to follow clean, elegant, simple and regular patterns that make your ruby beautiful.

If you have been programming for any extended period of time, I am sure you have started to see different patterns emerging out of your tasks. You may find you are doing the same thing over and over again, solving problems that you had previously solved in another project. These patterns can vary from smaller chunks of re-usable code, to manage the sending and receiving of email, all the way to watching over a part of your application and triggering notifications to another part of your application. This book, Design Patterns in Ruby takes several of the principles found in the widely known book, Design Patterns by The Gang of Four, and applies them to Ruby. It's a mixture of the theory behind the design patterns, and then hands-on practice applying it to your Ruby applications. While this book is centered around patterns in Ruby, it is not about teaching you Ruby. There is a brief primer in the beginning, but it comes with the understanding that you already know a little bit about the Ruby language. Now it's time to check out some of the patterns presented in this book.WHAT ARE PATTERNS?The book starts off with a chapter devoted to giving background to design patterns and how they can help you build better applications. This chapter isn't a history lesson. The main points of this chapter teach you about awareness. They teach you how to look at your applications, and when and where patterns could best be applied. He gives what he calls Patterns for Patterns while developing:Separate out the things that change from the things that stay the same.Program to an interface, not an implementation.Prefer composition over inheritance.Delegate, delegate, delegate.You ain't gonna need it.These principles provide us the glasses with which to look through as we assess our code. You will want to keep these in the back of your mind as you read through the rest of the book.WHAT IS RUBY?As I stated in the beginning, this book isn't about teaching you Ruby. However, the author does take the second chapter to walk you through the basics. This chapter simply shows you a bit of the syntax, types, and constructs. This intro is very brief, but probably enough to provide a reference throughout the rest of the book if you haven't worked with Ruby before. With this primer into Ruby, the author wraps up the first part of the book and we are now ready to move on to the 14 patterns covered in this book.THE PATTERNSSpotting patterns might not always be easy, even with the guidelines given in the first chapter. One of the strengths of this book is that each chapter poses a different problem and then tackles is using the suggested pattern. This allows you to see it in action, and allows you to get the wheels spinning on how the pattern is used and where else it could be used. After walking through each of the patterns, we are presented with a nice wrap-up of the pattern.This book is not very long in length, so I won't go into great detail with each of the patterns, as they are covered very well in each chapter. You need the context to understand how all of the pieces fit together. So, without providing too much information, here is a list of the patterns covered in the book:Template methodStrategyObserverCompositeIteratorCommandAdapterProxyDecoratorSingletonFactoryAbstract FactoryBuilderInterpreterIf you are like me, then you will have read these chapters and be left with a desire to instantly start researching, practicing, and applying what you have learned. But we aren't done quite yet, there is still one more section to go. We now know what the patterns look like. We have seen the examples done solely in Ruby. Everything makes sense. But can we do more? Now we shift gears to look at patterns found in the Ruby language itself.THE PATTERNS + RUBYThe Ruby language itself has several patterns that make programming Ruby fun and elegant. The last part of this book shows us a few of those patterns, as they can be used extensively while building your application patterns. If you have ever browsed through the Ruby on Rails source code, then you will have seen all of the patterns listed above, as well as the patterns in Ruby. Here are a few of those:Domain-Specific LanguagesMeta-programmingConvention over configurationRuby is such an elegant language to work with, and it is due in many parts to these patterns found within the language. These aren't patterns solely used by Ruby, but the English-like nature of Ruby makes it fun to both read and write with these patterns.PARTING THOUGHTSThis book fits nicely with the Addison Wesley Professional Ruby Series, but doesn't require you to read all other books in the series to fully comprehend. While the progression of this book was done very well, starting you off with a discussion of patterns and Ruby, then diving right into the patterns, I did find myself reading this book several times. I didn't read it several times because I didn't understand it, but simply to read with a new outlook on how and where these patterns could be applied, or are currently applied out in the wild. I find this book not only to be very informative, but also an excellent reference as I look to solve different problems. If you are a programmer, you should definitely read Design Patterns. If you are a Ruby programmer, you should then read Design Patterns in Ruby.

Design Patterns in Ruby is humorous at times and well thought out, covering 14 of the Gang of Four (GoF) design patterns. Since it's written with the Ruby language in mind, the examples take advantage of things like `method_missing` and were really clear to me since I write primarily in Ruby.As a newer software engineer, it's really valuable to recognize the patterns I've seen and used and to put names to them. I think it's intended audience is intermediate software engineers who are looking for new ways to structure their code and want to learn some terms that help articulate code structure to other engineers.

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Design Patterns in Ruby PDF

Design Patterns in Ruby PDF

Design Patterns in Ruby PDF

Design Patterns in Ruby PDF