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Design Patterns

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Design Pattern Katalog. Studienprojekt von Philipp Hauer. 2009 - 2010. © Zur KatalogübersichtStrategy, Observer, Decorator, Factory Method, Abstract Factory, Singleton, Command, Composite, Facade, State Literaturverzeichnis, Philipps Blog Design Pattern (Entwurfsmuster) sind bewährte Lösungswege für wiederkehrende Designprobleme in der Softwareentwicklung. Sie beschreiben die essenziellen Entwurfsentscheidungen (Klassen- und Objektarrangements). Durch den Einsatz von Design Pattern wird ein Entwurf flexibel, wiederverwendbar, erweiterbar, einfacher zu verwenden und änderungsstabil. In den Design Patterns manifestiert sich die jahrelange Berufserfahrung vieler Softewareentwicklern. Vorwort zu diesem Katalog Die primäre Zielgruppe dieses Katalogs sind Einsteiger in der Thematik der Design Pattern. Einführung: Anhand eines alltäglichen, intuitiven, nicht-technischen Beispiels wird das Design Pattern sukessive aufgebaut und/oder hergeleitet. Addyosmani/essential-js-design-patterns.

Writing Testable JavaScript. The engineering culture at Twitter requires tests. Lots of tests. I haven’t had formal experience with JavaScript testing before Twitter, so I’ve been learning a lot as I go. In particular, a number of patterns I used to use, write about, and encourage have turned out to be bad for writing testable code.

So I thought it would be worthwhile to share a few of the most important principles I’ve developed for writing testable JavaScript. The examples I provide are based on QUnit, but should be just as applicable to any JavaScript testing framework. Avoid Singletons One of my most popular posts was about using JavaScript Module Pattern to create powerful singletons in your application. For example, consider the following singleton module (contrived example, of course): With this module, we may wish to test the foo.bar method. When running this test suite, the assertion in the length test will fail, but it’s not clear from looking at it why it should.

Now, your test suite will look like this: A deep dive and analysis of the JavaScript Module pattern. Monday, March 15th, 2010 <>p>Ben Cherry has a really nice detailed analysis of the module pattern. He starts with the simple pattern that Crock-y documented back in the day….. and then goes on to discuss augmentation (loose and strict) and then deeper into some cool patterns: Nice work Ben!

Understanding Design Patterns in JavaScript. Today, we're going to put on our computer science hats as we learn about some common design patterns. Design patterns offer developers ways to solve technical problems in a reusable and elegant way. Interested in becoming a better JavaScript developer? Then read on. Republished Tutorial Every few weeks, we revisit some of our reader's favorite posts from throughout the history of the site.

Solid design patterns are the basic building block for maintainable software applications. A design pattern is a reusable software solution Simply put, a design pattern is a reusable software solution to a specific type of problem that occurs frequently when developing software. Patterns are proven solutions to software development problems patterns are scalable as they usually are structured and have rules that you should follow patterns are reusable for similar problems We'll get into some examples of design patterns further in to the tutorial. Take a look at the three examples above. JSPatterns.com. JavaScript Patterns. Learning JavaScript Design Patterns. Design patterns are reusable solutions to commonly occurring problems in software design.

They are both exciting and a fascinating topic to explore in any programming language. One reason for this is that they help us build upon the combined experience of many developers that came before us and ensure we structure our code in an optimized way, meeting the needs of problems we're attempting to solve. Design patterns also provide us a common vocabulary to describe solutions. This can be significantly simpler than describing syntax and semantics when we're attempting to convey a way of structuring a solution in code form to others. In this book we will explore applying both classical and modern design patterns to the JavaScript programming language.

Target Audience This book is targeted at professional developers wishing to improve their knowledge of design patterns and how they can be applied to the JavaScript programming language. Acknowledgments Credits Reading We already use patterns everyday.