Preface

Design patterns are among the most powerful methods of building large software systems. With an increasing focus on optimized software architecture and design, it is important that software architects think about optimizations in object creation, code structure, and interaction between objects at the architecture or design level. This makes sure that the cost of software maintenance is low, and code can be easily reused and is adaptable to change. Moreover, providing frameworks for reusability and separation of concerns is key to software development today.