By Russ Olsen

Praise for Design styles in Ruby

"Design styles in Ruby files clever how you can get to the bottom of many difficulties that Ruby builders often come across. Russ Olsen has performed an excellent task of choosing vintage styles and augmenting those with more moderen styles that experience designated relevance for Ruby. He basically explains every one thought, creating a wealth of expertise on hand to Ruby builders for his or her personal day-by-day work."

—Steve Metsker, handling advisor with Dominion electronic, Inc.

"This publication presents an outstanding demonstration of the most important 'Gang of Four' layout styles with out resorting to overly technical motives. Written in an actual, but virtually casual kind, this ebook covers sufficient floor that even these with out past publicity to layout styles will quickly consider convinced utilizing them utilizing Ruby. Olsen has performed a good activity to make a e-book a couple of classically 'dry' topic into such an enticing or even sometimes funny read."

—Peter Cooper

"This e-book renewed my curiosity in knowing styles after a decade of excellent intentions. Russ picked the main helpful styles for Ruby and brought them in an easy and logical demeanour, going past the GoF's styles. This ebook has stronger my use of Ruby, and inspired me to blow off the dirt masking the GoF book."

—Mike Stok

"Design styles in Ruby is a smart method for programmers from statically typed objectoriented languages to profit how layout styles seem in a extra dynamic, versatile language like Ruby."

—Rob Sanheim, Ruby Ninja, Relevance

Most layout trend books are in keeping with C++ and Java. yet Ruby is different—and the language's special characteristics make layout styles more straightforward to enforce and use. during this publication, Russ Olsen demonstrates easy methods to mix Ruby's strength and style with styles, and write extra refined, potent software program with a long way fewer traces of code.

After reviewing the historical past, techniques, and objectives of layout styles, Olsen deals a brief journey of the Ruby language—enough to permit any skilled software program developer to right away make the most of styles with Ruby. The booklet particularly calls recognition to Ruby good points that simplify using styles, together with dynamic typing, code closures, and "mixins" for simpler code reuse.

Fourteen of the vintage "Gang of Four" styles are thought of from the Ruby standpoint, explaining what difficulties every one trend solves, discussing no matter if conventional implementations make experience within the Ruby atmosphere, and introducing Ruby-specific advancements. You'll realize possibilities to enforce styles in exactly one or traces of code, rather than the without end repeated boilerplate that traditional languages frequently require.

Design styles in Ruby additionally identifies cutting edge new styles that experience emerged from the Ruby group. those contain how you can create customized gadgets with metaprogramming, in addition to the formidable Rails-based "Convention Over Configuration" trend, designed to assist combine complete purposes and frameworks.

Engaging, sensible, and obtainable, Design styles in Ruby can assist you construct higher software program whereas making your Ruby programming event extra rewarding.

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Praise for layout styles in Ruby

"Design styles in Ruby records clever how one can unravel many difficulties that Ruby builders mostly come upon. Russ Olsen has performed an excellent task of choosing vintage styles and augmenting those with more moderen styles that experience targeted relevance for Ruby. He truly explains every one notion, creating a wealth of expertise on hand to Ruby builders for his or her personal day-by-day paintings. "

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"This booklet presents an exceptional demonstration of the major 'Gang of Four' layout styles with out resorting to overly technical causes. Written in an exact, but nearly casual kind, this e-book covers sufficient floor that even these with no past publicity to layout styles will quickly think convinced making use of them utilizing Ruby. Olsen has performed an outstanding task to make a booklet a few classically 'dry' topic into such a fascinating or even sometimes funny learn. "

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—Rob Sanheim, Ruby Ninja, Relevance

Most layout development books are in line with C++ and Java. yet Ruby is different—and the language's targeted characteristics make layout styles more uncomplicated to enforce and use. during this e-book, Russ Olsen demonstrates find out how to mix Ruby's energy and magnificence with styles, and write extra refined, powerful software program with a long way fewer strains of code.

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Fourteen of the vintage "Gang of Four" styles are thought of from the Ruby standpoint, explaining what difficulties each one trend solves, discussing no matter if conventional implementations make feel within the Ruby surroundings, and introducing Ruby-specific advancements. You'll realize possibilities to enforce styles in precisely one or traces of code, rather than the perpetually repeated boilerplate that traditional languages usually require.

Design styles in Ruby additionally identifies leading edge new styles that experience emerged from the Ruby neighborhood. those comprise how you can create customized items with metaprogramming, in addition to the bold Rails-based "Convention Over Configuration" trend, designed to aid combine whole functions and frameworks.

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Extra resources for Design Patterns in Ruby (Addison-Wesley Professional Ruby Series)

Sample text

Separate Out the Things That Change from Those That Stay the Same Software engineering would be a lot easier if only things would stay the same. We could build our classes serene in the knowledge that, once finished, they would continue to do exactly what we built them to do. Of course, things never stay the same, not in the wider world and certainly not in software engineering. Changes in computing hardware, operating systems, and compilers, combined with ongoing bug fixes and ever-migrating requirements, all take their toll.

That year, building on the work of Christopher Alexander, Kent Beck, and others, they published Design Patterns: Elements of Reusable Object-Oriented Software. The book was an instant hit, with the authors rapidly becoming famous (at least in software engineering circles) as the Gang of Four (GoF). The GoF did two things for us. First, they introduced most of the software engineering world to the idea of design patterns, where each pattern is a prepackaged solution to a common design problem. We should look around, they wrote, and identify common solutions to common problems.

You are betting that the database independence layer you so lovingly installed last year will be able to handle the database the system actually does move to: “What! Marketing wants us to support xyzDB? ” You are betting that your GUI internationalization will be able to deal with the specific languages that you need to support: “Gee, I didn’t realize that we would need to support a language that reads from right to left . ” Look at it this way: Barring a sharp blow to the head, as you stand here today you are as dumb as you ever will be.

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