Design Patterns Elements of Reusable Object Oriented



10 thoughts on “Design Patterns Elements of Reusable Object Oriented Software Addison Wesley Professional Computing Series

  1. Adnan Ali Adnan Ali says:

    Read to understand patterns but please think for yourself when you code


  2. Michael Michael says:

    I know this is an unpopular opinion but I think the concept of a design pattern is just this side of bogus Part of the issue is that the languages the industry has chosen have weak powers of abstraction and thus these patterns seem necessary Perhaps it's becoming a cliche or became one 10 years ago? but I'm sure some haven't yet been exposed to this thought in a decent language like Lisp most of these design patterns are trivial The patterns are only there to make up for the problems with the languages of choiceFor me another issue is that the idea of design patterns is firmly linked in my brain with absurd Java APIs that reuire me to deal with XYZManagers and ABCHandlers and twenty different classes all for something that anyone sane would have just provided a handful of simple functions for On the other hand this post by Richard Gabriel is interesting design patterns are worth looking into after all just not in this book


  3. Noah Coad Noah Coad says:

    A must have primer for any developer working with object oriented code While it was a decent read from front to back though a bit long it is even useful as a reference Some of the terms are outdated by today's coding conventions but the principles still apply and it is a fair exercise in mentally converting between the lingo used in the book and what you may be familiar with in C# Java or another OOP One interesting aspect is that you can immediately start to see what programming patterns you're already using today in the frameworks and libraries you may be using on a daily basis Putting a name to these design patterns such as Factory Command etc helps to identify them and understand them so you as a developer know when best to apply them to your own code Certainly worth having on any OOP software developer's bookshelf


  4. Darcey Darcey says:

    Note This is a reference book; I didn't actually read it cover to cover I did read the first two chapters in full thoughFor the last couple years I've been working as a software engineer and I've found myself getting very confused by a lot of our Java code Why do we use dependency injection? What's a factory and why do we need them? It felt like everyone else on my team had gotten some memo that I didn't receiveIt turns out that everyone else on my team did get some memo that I didn't receive and that memo was this bookThis book describes the concept of design patterns which are broad overarching ways of structuring your code Design patterns are not about ensuring syntactic or algorithmic correctness; rather they're about writing your code in a way that makes it easily extensible restructurable and maintainable A design pattern is not something like use for loops for iteration; that's just a specification of the syntactic structure of the language And as far as I understand test your code using unit tests is not a design pattern since it's not really about code structure just a good testing practiceAn example of a design pattern is something like using a factory to make new instances of an object Suppose you have some interface Foo and an implementation of it called FooImpl And suppose you freuently need to create new instances of this You could pepper your code with Foo foo new FooImpl but then suppose you wrote a new better implementation of the Foo interface called FooImplImproved or something You would have to find each instance of new FooImpl and replace it with new FooImplImproved This is a pain So instead you could create an object called FooFactory which returns instances of Foo Then you could do something like Foo foo FooFactorycreate This create method would then just contain return new FooImpl Then when you wanted to change FooImpl to FooImplImproved you would only have to change it in one place in the FooFactorycreate methodI think I would have benefited from encountering this book in college before I ever worked as a professional software engineer But I wouldn't have fully understood or appreciated it then I still don't fully understand it but now that I've worked in industry I have a much better understanding of the need for maintainable codeThis book definitely changed how I think of programming software engineering And if I'm understanding correctly back when this book came out it changed how everyone thought about software engineering As far as I know this book introduced the concept of a design pattern The book tells you about all sorts of different design patterns but I think the main impact of the book was not teaching people individual design patterns but introducing them to the concept of a design pattern altogether Once you have that concept you can identify and use new design patterns easily The specific design patterns presented are certainly useful but the concept itself is importantAlso in the spirit of reading the history of philosophy backwards this book taught me a lot about what was known about software engineering back in the early 90s just based on what it felt like it needed to explain to its audience One thing that surprised me was that it went out of its way to explain the separation into interface based inheritance and implementation based inheritance I'd always taken that distinction for granted because it's built into Java which was my first language But I realized after reading this book that the distinction between implementing an interface and inheriting an implementation was not always obvious And in C that distinction is not a syntactic feature but merely a design pattern Which makes me wonder what it would look like if OO languages incorporated of these design patterns into their syntax Anyway program to the interface not the implementation was something I had only learned since starting at this job; it's not something that was covered during my undergrad education So I was glad this book went out of its way to emphasize its importanceAnyway this book absolutely gets 5 stars for introducing me and also the rest of the software engineering world to a new conceptual framework that allows software engineers to do a much better job I expect that I will return to this book very often and will always view it as a useful resource


  5. Erika RS Erika RS says:

    Design Patterns is a very important reference and its contents are also important but it is a rather dull book to read This is mainly because the bulk of the book contains a catalog of patterns Like most catalogs it works better when you come to it looking for something specificI have two main criticisms of the patterns themselves both of which stem from the time the book was written than from any inherent problems with the patterns First each pattern contains a list of benefits and conseuences This section never considers the pattern from the view point of testability This is a pity because most of the patterns in my opinion serve to make the relevant components easier to testA serious complaint is that many of the patterns show their age by suggesting implementation inheritance as a good way of implementing these patterns While implementation inheritance still has its place in the programmer's toolbox current wisdom shies away from using it merely because it is convenient Instead current belief leans toward preferring interfaces in the Java sense of only defining operations and not implementations and reserves implementation inheritance for when it provides a tangible benefitThat said most of the patterns still have a useful core even if some of the details of pattern structure or implementation should be modified to fit better into common practice Just remember though if you want to read through it you need will power or a reading group preferably both


  6. Matt Hooper Matt Hooper says:

    This is the classic software design patterns bookMuch of this material is assumed knowledge in many development shops so a understanding of this book is very valuable However there seems to be a design pattern mania and some developers take the information in this book a bit too literally and assume these patterns are inflexible The patterns themselves are of value but the bigger take away from this book is how to solve problems with object oriented languages This is an excellent resource for developers looking to familiarize themselves with common design techniuesThis book verges on being a reference For of a guide check out Head First Design Patterns see my review


  7. Milhouse Van Houten Milhouse Van Houten says:

    Capturing a wealth of experience about the design of object oriented software four top notch designers present a catalog of simple and succinct solutions to commonly occurring design problems Previously undocumented these 23 patterns allow designers to create flexible elegant and ultimately reusable designs without having to rediscover the design solutions themselves


  8. Daniel Daniel says:

    I'd recommend this book to any Object Oriented programmer who wants to be even remotely familiar with the approaches being used to write production systems these days The Design Pattern based approach to software engineering has definitely caught on and if you aren't familiar with at least the basic patterns you need to be not only to they make logical sense but real development teams use the pattern names often in discussions amongst multiple developers to describe the systemsconceptsetc being discussed If you're not familiar with them then you'll uickly get lost in the conversation et al There are other books on J2EE patterns or Unit Test Patterns etc but you need to be familiar with the basics first and THIS IS THE BOOK Commonly reffered to as the GoF or Gang of Four Book this is one hard cover that you MUST HAVE ON YOUR BOOKSHELF period


  9. Ahmed Salem Ahmed Salem says:

    Beautiful Book for very complicated topic for developers and software architects I liked the first chapter of introduction very much and one of the best trends I have learned from this book is that You don't have to use all design patterns in the software you are making just use what you think it is useful for the current situation and purpose of the current software you are working on nowMerged reviewBeautiful Book for very complicated topic for developers and software architects I liked the first chapter of introduction very much and one of the best trends I have learned from this book is that You don't have to use all design patterns in the software you are making just use what you think it is useful for the current situation and purpose of the current software you are working on now


  10. Steve Steve says:

    Ahhhh design patterns Most software engineers have probably used several of the patterns in this book without even realizing it Still I found it to be a useful validation of some of my design approaches as well as a valuable resource for streamlining my design Reading it cover to cover will put any software architect in a position to solve many design issues faster than they may have otherwise


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Design Patterns Elements of Reusable Object Oriented Software Addison Wesley Professional Computing Series ✴ [BOOKS] ⚡ Design Patterns Elements of Reusable Object Oriented Software Addison Wesley Professional Computing Series By Erich Gamma ✾ – Natus-physiotherapy.co.uk Capturing a wealth of experience about the design of object oriented software four top notch designers present a catalog of simple and succinct solutions to commonly occurring design problems Previous Capturing a wealth of experience Elements of Kindle Ï about the design of object oriented software four top notch designers present a catalog of simple and succinct solutions to commonly occurring design Design Patterns PDF \ problems Previously undocumented these patterns allow designers to create flexible elegant and ultimately reusable designs without having to rediscover the design solutions themselvesThe authors begin by describing what Patterns Elements of Epub Û patterns are and how they can help you design object oriented software They then go on to systematically name explain evaluate and catalog recurring designs in object oriented systems Patterns Elements of Reusable Object ePUB í With Design Patterns as your guide you will learn how these important patterns fit into the software development process and how you can leverage them to solve your own design problems most efficiently Each pattern describes the circumstances in which it is applicable when it can be applied in view of other design constraints and the conseuences and trade offs of using the pattern within a larger design All patterns are compiled from real systems and are based on real world examples Each pattern also includes code that demonstrates how it may be implemented in object oriented programming languages like C or Patterns Elements of Reusable Object ePUB í Smalltalk.