Presents a catalog of simple solutions to commonly occurring design problems. These 23 patterns allow designers to create more reusable designs without having to rediscover the design solutions themselves. The authors begin by describing what patterns are, and how they may be able to help you design object-oriented software.
Design Patterns is based on the idea that there are only such a lot of design problems in computer programming. This book identifies some common program-design problems–such as adapting the interface of one object to that of another object or notifying an object of a change in another object’s state–and explains the best ways (not at all times the obvious ways) that the authors know to solve them. The idea is that you’ll use the authors’ sophisticated design ideas to solve problems that you incessantly waste time solving over and over again in your own programming.
The authors have get a hold of some ingenious ways to solve some common vexations among object-oriented programmers. Want to build a page-layout program that embeds inline images among characters of various sizes? How about building a program that converts files of one format to another? Chances are, some programmer already has thought of a better solution than you’re going to and the recipes you want are here. Solutions are presented in generalised diagrams of data and logic structures. The idea is that you’ll take the concepts presented here and adapt them–in whatever language you use–to your individual situation. You may have to read one of the most chapters several times before you fully understand them, but when you find a solution in this book, it’s going to make your job easier and your results more elegant. —Jake Bond
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